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description the afct-57v6nsz transceiver is a specially customised low-cost and hot-pluggable sfp msa-compliant optical interconnect module for gigabit ethernet applications at transmission distances up to 40km [1, 2]. the afct-57v6nsz implements the serial portion of the physical layer, and supports the features shown below the afct-57v6nsz features diferential serial i/o inter - face lines that are ac-coupled signals. avagos design of the long wavelength sfp module uses a 1550 nm distributed feedback (dfb) laser diode (ld) and takes advantage of an integrated preamplifer/photo-detector. the afct-57v6nsz also contains transmitter, receiver and control electronics. singlemode optical fber, with lc connectors, is rec - ommended as the communication media. the afct- 57v6nsz has a digital diagnostic monitoring (ddm) function in accordance with sff-8472 [3] which allows monitoring operating temperature, supply voltage, laser bias current, transmitter optical output power and opti - cal received power in real time via a serial-id interface. on the following page, table1 lists the general specifca - tions for the afct-57v6nsz sfp. figure 1 shows a simplifed block diagram of the afct- 57v6nsz electronics. related products ? afbr-5715z family: 850 nm 1.25 gbd 3.3 v multimode sfp gigabit ether - net transceivers with dmi ? afct-5715z: 1.25 gbd ethernet (1000base-lx) sfp with dmi features ? gigabit ethernet transceiver ? rohs compliant ? ieee 802.3z, 1000base-zx ? extended transmission distance up to 40 km ? compliant with sfp multi source agreement (msa) ? duplex-lc optical interface ? 1550 nm dfb-ld ? serial id ? digital diagnostic monitoring interface ? bail delatch for easy removal from cage ? available in industrial temperature range (-40 to +85c) ? immune to esd, rf felds, and vcc noise ? designed for very low rf emissions ? class 1 laser safety ? ac-coupled diferential serial i/o interface ? single +3.3 volt supply operation ? low power dissipation applications ? ethernet switches ? multi-service switches and routers ? broadband aggregation and wireless infrastructure ? switched backplane applications ? high speed interface for server farms ? metro access switch gbe connections afct-57v6nsz small form factor pluggable (sfp) lc optical transceiver for 1.25gbd ethernet at extended link lengths (up to 40km) data sheet
2 figure 1. afct-57v6nsz simplifed block diagram table 1. general afct-57v6nsz specifcations parameter 1000base-zx* unit nominal bit rate 1.25 gbps link loss budget 17 db minimum required link loss 0 db bit error ratio(ber) <10 -12 - fiber core diameter 9 m m operating range(max) 40 km ? optical specifcations are modifed to realize 40 km transmission in singlemode fber. dfb-ld dc bias circuit optical outpu t rd + rd - td + td - 100 ohm tz amp apc pd mod_def[1] tx_faul t vccr vcct ve t veer sd a scl sc l sda module definition (a0h) digital diagnostic monitoring interface (a2h) monitor optica l connector modulation bias circuit control circuit circuit mod_def[2] tx_disabl e transmitter rx_lo s limiting amp level d etector pin-pd optical connecto r optical input receiver vcc slow start
3 table 2. absolute maximum ratings parameter symbol min max unit supply voltage vcc -0.3 4.0 v relative humidity * rh 5 85 % tx_disable input voltage vin -0.5 vcc+0.5 v storage temperature ts -40 +85 c ? no condensation table 3. recommended operating conditions parameter symbol min typ max unit supply voltage vcc 3.135 3.3 3.465 v ripple and noise - - - 100 mvp-p operating case temperature afct-57v6nsz afct-57v6ansz t c t c -5 -40 - - 70 85 c ? measured with a sinusoidal signal from 100 hz to 2 mhz at the input of the recommended power supply flter shown in figure 13. handling precautions avago advises that precautions be taken to avoid elec - trostatic discharge (esd) during handling, assembly, and testing of the afct-57v6nsz. degradation or damage can occur if proper guidelines for handling esd sensitive devices are not followed. this could result in an inoper - able device or unsafe operation as described above. in particular, avoid getting particulate or solvent contami - nation onto the optical surfaces of the laser and photo- detector assemblies. it is also strongly recommended that the lc connector receptacle be covered when not in use. excessive force when installing and extracting the afct- 57v6nsz should be avoided. refer to the sfp application note [6] for additional handling information. absolute maximum ratings operation of the afct-57v6nsz beyond the absolute maximum ratings listed in table 2 can degrade or dam - age the product. with the exception of laser safety, it is not implied that the product will function above the recommended operating conditions. it is possible to reduce the reliability and lifetime of the device if the recommended operating conditions are exceeded (see table 3). recommended operating conditions table 3 lists the conditions under which the afct- 57v6nsz is tested and should be operated. it is possible to reduce the reliability and lifetime of the device if these ratings are exceeded for extended periods. functional operation should be restricted to these recommended operating conditions. optical description table 4 describes the performance of the transmitter por - tion of the afct-57v6nsz over the operating conditions. table 5 describes the performance of the receiver portion of the afct-57v6nsz over the operating conditions. the optical pulse characteristics of the transmitter are specifed in the form of an eye pattern. when measured in accordance with [2], the mask shown in figure 2 evalu - ates rise time, fall time, overshoot and undershoot.
4 figure 2. transmitter eye mask table 4. transmitter optical specifcations parameter symbol min typ max unit spectral center wavelength l c 1500 1550 1580 nm -20db spectral width dl 20 - - 0.5 nm side mode suppression ratio smsr 30 - - db optical output power, average* p o -4 - 0 dbm extinction ratio er 9 - - db rise/fall time** tr/tf - - 260 ps total jitter (tj) tj - - 0.28 ui optical waveform - compliant with ieee 802.3z eye mask (refer to figure 2) - disable optical output power - - - -35 dbm ? smf 9/125 ?? 20 % - 80 % edge rate without flter table 5. receiver optical specifcations parameter symbol min typ max unit spectral center wavelength l c 1270 - 1600 nm receiver saturation pmax 0 - . dbm minimum receiver sensitivity pmin . - -21 dbm rx_los assert level los a -35 - . dbm rx_los de-assert level los d . - -24.5 dbm rx_los hysteresis los hys 0.5 2 . db return loss rl 12 - . db ? receiver sensitivity is measured at the center of the eye for ber=1x10-12 using prbs 2^7-1 130 100 80 50 20 0 -2 0 22 37.5 62.5 78 0 10 0 normalized amplitude (%) normalized time (% of unit interval)
5 table 6. electrical characteristics parameter symbol min typ max unit supply current i cc - - 300 ma inrush current* linrush - - 30 ma ? greater than the steady state value table 7. control/status signal characteristics parameter symbol min max unit tx_disable input voltage - high v ih 2.0 vcct v tx_disable input voltage - low v il 0 0.8 v tx_fault output voltage - high v oh host_vcc-0.5 host_vcc v tx_fault output voltage - low v ol 0 0.4 v rx_los output voltage C high v oh host_vcc-0.5 host_vcc v rx_los output voltage C low v ol 0 0.4 v mod_def[2] (sda) output voltage C low v ol . 0.4 v mod_def[1] (scl) input voltage C high v ih vcct, (vccr) x 0.7 . v mod_def[1] (scl) input voltage C low v il - vcct(vccr) x 0.3 v table 8. td+/- input signal requirements parameter symbol min typ max unit input amplitude, diferential v i 200 . 2400 mv p-p input impedance, diferential r i . 100 . w deterministic jitter dj . . 0.10 ui total jitter ?? tj . . 0.24 ui mark ratio . . 50 . % ? ac-coupled. ?? tj = rj + dj. at ber = 10-12 table 9. rd+/- output signal characteristics parameter symbol min typ max unit output amplitude, diferential* v o 600 - 1200 mvp-p output impedance, diferential r o - 100 - w ? ac-coupled. electrical description the supply current of the afct-57v6nsz is described in table 6 below. the inrush current is defned as the ad - ditional inrush due to hot plugging. the characteristics for the control and status signals are shown in table 7. output status signals, tx_fault and rx_los, are all open-collector/drain, and the levels indi - cated assuming 4.7k-10k ohm pull-up resistor to host_vcc is present. the levels of mod_def [1] and mod_def [2] are also indicated assuming that they are pulled up with a 4.7k-10k ohm resistor to +3.3 v on host board. table 8 indicates the voltage levels required to be delivered by the host to the transmitter diferential serial data input td+/-. table 9 indicates the voltage level output from the receiver diferential serial data output rd+/-.
6 figure 3. sfp transceiver electrical pad layout veet td- td+ veet vcct vccr veer rd+ rd- veer 20 19 18 17 16 15 14 13 12 11 veet tx_fault tx_disable rx_los veer veer 1 2 3 4 5 6 7 8 9 10 top of board bottom of board (as view through top of board) rate_select mod_def[0] mod_def[1] mod_def[2] hot-plugging sequence the ground, vcc and other pins designated as the se - quence (1) pins engage frst during hot-plugging. the sequence (2) pins connect second during hot-plugging followed by the sequence (3) pins. conversely, when the module is unplugged from the host system, the se - quence (3) pins disengages before the sequence (2) pins disengages and then followed by the sequence (1) pins. inserting or removing the afct-57v6nsz will disrupt data transmission. this disruption occurs when the downstream receiver (e.g. deserializer phase-lock-loop) resynchronizes to a diferent bitstream signal. when this occurs, the downstream system will recognize the asso - ciated error (e.g. comma detect, loss-of-light, disparity, crc, and frame errors). it is the responsibility of the system integrator to assure that no thermal, energy, or voltage hazard exists during the hot-plug-unplug sequence. it is also the responsibility of the system integrator and end-user to minimize static electricity and the probability of esd events by careful design. pin description a brief description of all of the electrical connector pins follows. the connector has staged contacts, so that hot-plug - ging can be performed. see table 10. table 10. pinout pin no. sequence description pin no sequence description 1 1 veet 11 1 veer 2 3 tx_fault 12 3 rd- 3 3 tx_disable 13 3 rd+ 4 3 mod_def[2] 14 1 veer 5 3 mod_def[1] 15 2 vccr 6 3 mod_def[0] 16 2 vcct 7 3 rate_select 17 1 veet 8 3 rx_los 18 3 td+ 9 1 veer 19 3 td- 10 1 veer 20 1 veet
7 pin defnitions td+/td- transmit data in and inverted transmit data in are diferential input to the transmitter. they are internally ac- coupled into an equivalent load of ri diferential, as shown in figure 13. tx_disable active high ttl input, with internal 10k w pull- up resistor to vcc. asserting the transmitter disable will deactivate the laser within the assert time. the truth table shown describes the state of the module, and table 11 indicates the timing of tx_disable. rd+/rd- received data out and inverted received data out are diferential serial output from the receiver. these are ac-coupled 100 ohm diferential lines which should be terminated with a 100 ohm (diferential) at the user serdes, as shown in figure 13. ac coupling is done inside the module and is thus not required on the host board. rx_los active high open collector/drain output which indicates a loss-of-signal condition (los). when the aver - age optical power received by the module is below the assert level, rx_los is indicated according to the truth table below, and table 11 indicates the timing of rx_los. rx_los requires a 4.7k-10k ohm pull-up resistor external to the module, i.e., in the host system host_vcc, as shown in figure 13. the pull-up voltage is between 2.0 v and vccr(vcct) + 0.3 v. rate_select not connected. tx_fault active high open collector/drain output which indicates a fault in the module. this can be (1) failure of the laser driver or (2) end-of-life of the laser. under these conditions, the laser will be de - activated within the assert time. tx_fault also requires a 4.7k-10k ohm pull-up resistor external to the module, i.e. in the host system host_vcc, as shown in figure 13. the pull-up voltage is between 2.0 v and vcct(vccr) + 0.3 v. conditions (1) and (2) are latched, and for diagnostic pur - poses only, may be reset by toggling tx_disable high for at least t_reset. see table 11 and figure 8. mod_def[0:2] the afct-57v6nsz has a serial id func - tion which provides information about the transceivers capabilities, standard interfaces, manufacturer and other information, and has a digital diagnostic monitoring function, per sff-8472 [3], which allows monitoring op - erating temperature, supply voltage, laser bias current, transmitter optical output power and optical received power in real time. these functions are provided via a two wire serial eeprom interface. mod_def[0] is connected to ground inside the module. mod_def[1] is the serial clock signal input. mod_def[2] is the data output/input.
8 timing characteristics of control and status i/o the timing characteristics of the control and status line are listed in table 11 and figure 4 to 10. table 11. timing characteristics of control and status i/o parameter symbol min max unit condition tx_disable assert time t_of - 10 s time from rising edge of tx_disable to when the optical output falls below 10 % of nominal tx_disable negate time t_on - 1 ms time from falling edge of tx_disable to when the modu - lated optical output rises above 90% of nominal time to initialize, including reset of tx_fault t_init - 300 ms from power on or negation of tx_fault using tx_dis - able tx_fault assert time t_fault - 100 s time from fault to tx_fault on tx_disable to reset t_reset 10 - s time tx_disable must be held high to reset tx_fault rx_los assert time t_losson - 100 s time from los state to rx_los assert rx_los negate time t_lossof - 100 s time from non-los state to rx_los deassert serial id clock rate f_clock - 100 khz -
9 figure 4. power on initialization of sfp transceiver, tx_disable negated t_init tx_disable vcc > 2.97 v tx_fault transmitted signal t_init tx_disable vcc > 2.97 v tx_fault transmitted signal tx_disable tx_fault transmitted signal t_off t_on occurrence of transmitter safety fault tx_disable tx_fault transmitted signal t_fault figure 5. power on initialization of sfp transceiver, tx_disable asserted figure 6. sfp tx_disable timing during normal operation figure 7. detection of transmitter safety fault condition t_reset t_init * occurrence of transmitter safety fault tx_disable tx_fault transmitted signal * sfp will clear tx_fault in < t_init if the fault is transient t_fault t_reset t_init * occurrence of transmitter safety fault tx_disable tx_fault transmitted signal * sfp will clear tx_fault in < t_init if the fault is transient t_lossoff t_losson occurrence of loss of signal (los) rx_los figure 8. successful recovery from transient safety fault condition figure 9. unsuccessful recovery from safety fault condition figure 10. timing of rx_los detection
10 table 12. serial id: data fields - 2-wire address a0h base id fields data address field size (byte) name of feld description of field context (hex) 0 1 identifer sfp 03h 1 1 ext. identifer sfp 04h 2 1 connector lc 07h 3 8 transceiver 00h 4 00h 5 00h 6 1000base-lx 02h 7 00h 8 00h 9 00h 10 00h 11 1 encoding 8b/10b 01h 12 1 br, nominal x 100 mbits/sec 0ch 13 1 reserved 00h 14 1 length (9m) - km 40 x 1 km 28h 15 1 length (9m) longer than 25.4 km ffh 16 1 length (50m) not supported - 00h 17 1 length (62.5m) not supported - 00h 18 1 length (copper) not supported - 00h 19 1 reserved 00h 20 16 vendor name a 41 21 v 56 22 a 41 23 g 47 24 o 4f 25 20h 26 20h 27 20h 28 20h 29 20h 30 20h 31 20h 32 20h 33 20h 34 20h 35 20h serial identifcation the serial identifcation (id) at 2 wire serial bus address 1010000x (a0h) provides access to identifcation in - formation that describes the transceivers capabilities, standard interfaces, manufacturer, and other information. the serial interface uses the 2-wire serial cmos e2prom protocol defned for the atmel at24c01a/02/04 family of components or equivalent components. the informa - tion obtained from the afct-57v6nsz via the serial id is shown in table 12.
11 table 12. serial id: data fields - 2-wire address a0h (continued) base id fields data address field size (byte) name of feld description of field context (hex) 36 1 reserved 00h 37 3 vendor oui 00-17-6a 00h 38 17h 39 6ah 40 16 vendor pn a 41 41 f 46 42 c 43 43 t 54 44 - 2d 45 5 35 46 7 37 47 v 56 48 5 35 49 n 4e 50 s 53 51 z 5a 52 20h 53 20h 54 20h 55 20h 56 4 vendor rev. note 1 57 note 1 58 note 1 59 note 1 60 2 laser wavelength 1550 nm 06h 61 0eh 62 1 reserved 00h 63 1 cc base check code note 2 notes: 1. these addresses are reserved for vendor revision. 2. data address 63 is the check sum for byte 0 to byte 62 (base id fields).
12 table 12.- serial id: data fields - 2-wire address a0h (continued) extended id fields data address field size (byte) name of feld description of field context (hex) 64 2 function 00h 65 tx_disable, tx_fault, rx_los 1ah 66 1 br, max. unspecifed 00h 67 1 br, min. unspecifed 00h 68 16 vendor s/n note 3 69 note 3 70 note 3 71 note 3 72 note 3 73 note 3 74 note 3 75 note 3 76 note 3 77 note 3 78 note 3 79 note 3 80 note 3 81 note 3 82 note 3 83 note 3 84 8 data code year (ascii code) note 4 85 note 4 86 digits of month (ascii code) note 4 87 note 4 88 day of month (ascii code) note 4 89 note 4 90 vendor specifc lot code (ascii code) note 4 91 note 4 92 1 diagnostic monitoring type -digital diagnositic monitoring-inter - nally calibrated-average power 68h 93 1 enchanced option -alarm/warning flags implemented- soft tx_fault and rx_los monitor - ing f0h 94 1 sff-8472 compliance includes functionality described in rev 9.3 sff8472 01h 95 1 cc_ext check code for extended id fields note 5 vendor specific id fields 96-255 160 00h notes: 3. these addresses are reserved for vendor sn (serial number). 4. these addresses are reserved for date code information 5. data address 95 is the check sum for byte 64 to byte 94 (extended id fields).
13 table 13. diagnostic parameters diagnostic parameter range lsb accuracy address note min. max. transceiver temperature(temp) -15 [oc] +105 [oc] 1/256 [oc] 3 [oc] 96-97 a 16 bit signed twos complement value supply voltage (voltage) +2.97 [v] +3.63 [v] 100 [v] 3 [%] 98-99 a 16 bit unsigned integer tx bias current (bias) 0 [ma] +95 [ma] 2.0 [a] 10 [%] 100-101 a 16 bit unsigned integer tx optical output power (tx power) -6 [dbm] +2 [dbm] 0.1 [w] 3 [db] 102-103 a 16 bit unsigned integer rx optical input power (rx power) -25 [dbm] +3 [dbm] 0.1 [w] 3 [db] 104-105 a 16 bit unsigned integer table 14. alarm and warning thresholds parameter unit warning alarm low high low high transceiver temperature oc -5 +70 -10 +75 supply voltage v +3.1 +3.5 +3 +3.6 tx bias current ma 5 80 3 90 tx optical output power dbm -4 0 -7 +3 rx optical input power dbm -21 0 -22 +1 digital diagnostic monitoring 2 wire serial bus address 1010001x (a2h) is used to access measurement of transceiver temperature, internally mea - sured supply voltage, tx bias current, tx optical output power and rx optical input power which are shown in table 13. each diagnostic parameter has a corresponding high alarm, low alarm, high warning and low warning threshold which are shown in table 14. alarm fags indi - cate conditions likely to be associated with an inopera - tional link and cause for immediate action. warning fags indicate conditions outside the normally guaranteed bounds but not necessarily causes of immediate link fail - ures. it is recommended that detection of an asserted fag bit should be verifed by a second read of the fag at least 100 msec later. the detail contents of the 2 wire address a2h are shown in table 15 to 21.
14 table 15. alarm and warning thresholds (2-wire address a2h) address # bytes name description 00-01 2 temp high alarm msb at low address 02-03 2 temp low alarm msb at low address 04-05 2 temp high warning msb at low address 06-07 2 temp low warning msb at low address 08-09 2 voltage high alarm msb at low address 10-11 2 voltage low alarm msb at low address 12-13 2 voltage high warning msb at low address 14-15 2 voltage low warning msb at low address 16-17 2 bias high alarm msb at low address 18-19 2 bias low alarm msb at low address 20-21 2 bias high warning msb at low address 22-23 2 bias low warning msb at low address 24-25 2 tx power high alarm msb at low address 26-27 2 tx power low alarm msb at low address 28-29 2 tx power high warning msb at low address 30-31 2 tx power low warning msb at low address 32-33 2 rx power high alarm msb at low address 34-35 2 rx power low alarm msb at low address 36-37 2 rx power high warning msb at low address 38-39 2 rx power low warning msb at low address 40-55 16 reserved reserved for future monitored quantities
15 table 16. calibration constants for external calibration option (2-wire address a2h) address # bytes name description content 56-59 4 rx_pwr(4) single precision foating point calibration data -rx optical power. bit 7 of byte 56 is msb. bit 0 of byte 59 is lsb. 0 60-63 4 rx_pwr(3) single precision foating point calibration data -rx optical power. bit 7 of byte 60 is msb. bit 0 of byte 63 is lsb. 0 64-67 4 rx_pwr(2) single precision foating point calibration data, rx optical power. bit 7 of byte 64 is msb, bit 0 of byte 67 is lsb. 0 68-71 4 rx_pwr(1) single precision foating point calibration data, rx optical power. bit 7 of byte 68 is msb, bit 0 of byte 71 is lsb. 1 72-75 4 rx_pwr(0) single precision foating point calibration data, rx optical power. bit 7 of byte 72 is msb, bit 0 of byte 75 is lsb. 0 76-77 2 tx_i(slope) fixed decimal (unsigned) calibration data, laser bias current. bit 7 of byte 76 is msb, bit 0 of byte 77 is lsb. 1 78-79 2 tx_i(ofset) fixed decimal (signed twos complement) calibration data, laser bias current. bit 7 of byte 78 is msb, bit 0 of byte 79 is lsb. 0 80-81 2 tx_pwr(slope) fixed decimal (unsigned) calibration data, transmitter coupled output power. bit 7 of byte 80 is msb, bit 0 of byte 81 is lsb. 1 82-83 2 tx_pwr(ofset) fixed decimal (signed twos complement) calibration data, transmitter coupled output power. bit 7 of byte 82 is msb, bit 0 of byte 83 is lsb. 0 84-85 2 t(slope) fixed decimal (unsigned) calibration data, internal module tempera - ture. bit 7 of byte 84 is msb, bit 0 of byte 85 is lsb. 1 86-87 2 t(ofset) fixed decimal (signed twos complement) calibration data, internal module temperature. bit 7 of byte 86 is msb, bit 0 of byte 87 is lsb. 0 88-89 2 v(slope) fixed decimal (unsigned) calibration data, internal module supply voltage. bit 7 of byte 88 is msb, bit 0 of byte 89 is lsb. 1 90-91 2 v(ofset) fixed decimal (signed twos complement) calibration data, internal module supply voltage. bit 7 of byte 90 is msb. bit 0 of byte 91 is lsb. 0 92-94 3 reserved reserved 95 1 checksum byte 95 contains the low order 8 bits of the sumof bytes 0-94.
16 table 17. a/d values and status bits (2 wire address a2h) byte bit name description converted analog values. calibrated 16 bit data 96 all temperature msb internally measured module temperature. 97 all temperature lsb 98 all vcc msb internally measured supply voltage in transceiver. 99 all vcc lsb 100 all tx bias msb internally measured tx bias current. 101 all tx bias lsb 102 all tx power msb measured tx output power. 103 all tx power lsb 104 all rx power msb measured rx input power. 105 all rx power lsb 106 all reserved msb reserved for 1st future defnition of digitized analog input 107 all reserved lsb reserved for 1st future defnition of digitized analog input 108 all reserved msb reserved for 2nd future defnition of digitized analog input 109 all reserved lsb reserved for 2nd future defnition of digitized analog input optional status/control bits 110 7 tx disable state digital state of the tx_disable input pin. 110 6 soft tx disable read/write bit that allows software disable of laser. 110 5 reserved 110 4 rx rate select state digital state of the sfp rx rate select input pin.not supported. 110 3 soft rx rate select read/write bit that allows software rx rate select.not supported. 110 2 tx fault digital state of the tx_fault output pin. 110 1 los digital state of the rx_los output pin. 110 0 data ready bar indicates transceiver has achieved power up and databit remains high until data is ready to be read at whichdevice sets the bit low. 111 7-0 reserved reserved.
17 table 18. alarm and warning flag bits (2-wire address a2h) byte bit name description reserved optional alarm and warning flag bits 112 7 temp high alarm set and latch when internal temperature exceeds high alarm level ? 112 6 temp low alarm set and latch when internal temperature is below low alarm level ? 112 5 vcc high alarm set and latch when internal supply voltage exceeds high alarm level ? 112 4 vcc low alarm set and latch when internal supply voltage is below low alarm level ? 112 3 tx bias high alarm set and latch when tx bias current exceeds high alarm level ? 112 2 tx bias low alarm set and latch when tx bias current is below low alarm level ? 112 1 tx power high alarm set and latch when tx output power exceeds high alarm level ? 112 0 tx power low alarm set and latch when tx output power is below low alarm level ? 113 7 rx power high alarm set and latch when received power exceeds high alarm level ? 113 6 rx power low alarm set and latch when received power is below low alarm level ? 113 5 reserved alarm 113 4 reserved alarm 113 3 reserved alarm 113 2 reserved alarm 113 1 reserved alarm 113 0 reserved alarm 114 all reserved 115 all reserved 116 7 temp high warning set and latch when internal temperature exceeds high warning level ? 116 6 temp low warning set and latch when internal temperature is below low warning level ? 116 5 vcc high warning set and latch when internal supply voltage exceeds high warning level ? 116 4 vcc low warning set and latch when internal supply voltage is below low warning level ? 116 3 tx bias high warning set and latch when tx bias current exceeds high warning level ? 116 2 tx bias low warning set and latch when tx bias current is below low warning level ? 116 1 tx power high warning set and latch when tx output power exceeds high warning level ? 116 0 tx power low warning set and latch when tx output power is below low warning level ? 117 7 rx power high warning set and latch when received power exceeds high warning level ? 117 6 rx power low warning set and latch when received power is below low warning level ? 117 5 reserved warning 117 4 reserved warning 117 3 reserved warning 117 2 reserved warning 117 1 reserved warning 117 0 reserved warning 118 all reserved 119 all reserved ? latch state cleared on read, power cycle or the host toggles tx_disable.
18 table 19. vendor specifc memory address and user eeprom (2-wire address a2h) byte # byte name description 120-127 8 vendor specifc 00h. 128-247 120 user eeprom user writable eeprom 248-255 8 00h table 20. bit weights (c) for temperature reporting registers most signifcant byte (byte 96) least signifcant byte (byte 97) d7 d6 d5 d4 d3 d2 d1 d0 d7 d6 d5 d4 d3 d2 d1 d0 sign 64 32 16 8 4 2 1 1/2 1/4 1/8 1/16 1/32 1/64 1/128 1/256 table 21. digital temperature format temputer binary hexadecimal decimal fraction high byte low byte high byte low byte +127.996 +127 255/256 01111111 11111111 7f ff +125.000 +125 01111101 00000000 7d 00 +25.000 +25 00011001 00000000 19 00 +1.004 +1 1/256 00000001 00000001 01 01 +1.000 +1 00000001 00000000 01 00 +0.996 +255/256 00000000 11111111 00 ff +0.004 +1/256 00000000 00000001 00 01 0.000 0 00000000 00000000 00 00 -0.004 -1/256 11111111 11111111 ff ff -1.000 -1 11111111 00000000 ff 00 -25.000 -25 11100111 00000000 e7 00 -40.000 -40 11011000 00000000 d8 00 -127.996 -127 255/256 10000000 00000001 80 01 -128.000 -128 10000000 00000000 80 00
19 figure 11. serial id and digital diagnostic memory map timing characteristics of serial id/ddm the timing characteristics of the serial id /ddm are listed in table 22 and figure 12. table 22. timing characteristics of serial id / ddm parameter symbol min max unit scl clock rate f_clock . 100 khz bus free time between stop and start condition t buf 4.7 . s start condition hold time t hd:sta 4.0 . s start condition setup time t su:sta 4.7 . s low period of scl clock t low 4.7 . s high period of scl clock t high 4.0 . s data hold time t hd:dat 0 . ns data setup time t su:dat 250 . ns rise time t r . 1.0 s 2 wire addrress 1010000x (a0h) 255 127 95 0 255 127 95 0 55 119 247 2 wire addrress 1010001x (a2h) serial id defined by sfp msa (96 bytes) vendor specific (32 bytes) alarm and warning thresholds (56 bytes) cal constants (40 bytes) real time diagnostic interface (24 bytes) vendor specific (8 bytes) reserved in sfp msa (128 bytes) user writable eeprom (120 bytes) vendor specific (8 bytes)
20 figure 12. serial id and ddm timing figure 13. recommended power supply filter and example of sfp host board schematic t su:sto thd:sta t su:sta t su:dat t high t f thd:dat t r t low t hd:sta t buf repeated start start stop sda scl laser driver 100 ohm td+ td- vcct vc cr rd+ rd- serdes ic 100 ohm protocol ic rx_los protocol vcc pld/pal +3.3 v ve et ve er note 1 +3.3 v 1 uh 1 uh 10 uf 10 uf 0.1 uf 0.1 uf 0.1 uf 10 uf sfp module host board 4.7k-10k ohm recommended power supply filter tx_fault tx_disable preamp & postamp rate_select 4.7k-10k ohm 4.7k-10k ohm 4.7k-10k ohm 4.7k-10k ohm serial id & ddm mod_def[2] mod_def[0] mod_def[1] note 1: consult the serdes manufacturer for the termination method. t wr st ar t c ond it io n sda sc l st op cond it ion ac k d0 wo rd n
21 figure 14. afct-57v6nsz mechanical outline drawing laser eye safety the avago technologies afct-57v6nsz module is a class 1 laser product under the requirements of iec 60825- 1:1993+a1:1997+a2:2001 and u. s. 21 cfr 1040.10 and 1040.11 except for deviations pursuant to laser notice no. 50, dated july 26, 2001, when used as specifed by avago. class 1 products are considered to be safe. caution -use of controls or adjustment or performance of procedures other than those specifed herein may result in hazardous radiation exposure. any modifca - tion, adjustment, or use of the afct-57v6nsz module not specifed by avago may void the certifcation of the product and constitute an act of new manufacturing of a laser product under 21 cfr subchapter j, and as such will require recertifcation by the new manufacturer. this includes operation beyond the absolute maximum rat - ings listed in table 2. connectors and cables the optical interface of the afct-57v6nsz is a duplex lc connector which is described in tia/eia focis document [5]. pc-polished ferrules are recommended in mating cables for the afct-57v6nsz. the electrical connection is provided by a card edge connector which mates with a corresponding socket [1]. in addition the transceiver fts a cage assembly [1] which also functions as an emi shield. contact an avago sales ofce for cable, electrical connector, cage and accessory ordering information. physical description figure 14 shows the mechanical outline of the avago afct-57v6nsz sfp. for a complete description of the footprint standards, refer to the msa specifcation [1]. 140.1 [0.5510.004 13,20.1 [0.5160.04] 55,50.20 [2.1580.008] 1,48 [0.058] 8.450.1 [0.3330.004] 12.70.1 [0.5000.004] 6,250.05 [0.2460.002] 14,46 +0,1-0 [0.569] 13,70.1 [0.5390.004] area for dust cap avag o afct-5745xxx z ####nmlaser pro d country of origin yyww s/n:######## 21cfr(j) class1 rx tx 15.5 [0.610] notes: 1. bail delatch is colored blue for sonet/single-mode identification.
regulatory information this product is under testing with respect to american and european product safety and electromagnetic com - patibility regulations. for further information regarding regulatory certifcation, refer to the sfp regulatory speci - fcation [7] and sfp application note [6], or contact the avago sales ofce. references [1] small form-factor pluggable (sfp) transceiver multi source agreement, september 14, 2000 [2] ieee 802.3z media access control (mac) parameters, physical layer, repeater and management parameters for 1000mb/s operation. [3] sff-8472, digital diagnostic monitoring interface for optical transceivers, draft revision 9.3, august 1, 2002 [4] a. widmer & p. franaszek, a dc-balanced, partitioned- block, 8b/10b transmission code ibm journal of research & development, vol. 27, no. 5, pg. 440-451, (sept. 1983). [5] tia/eia-604-10, focis 10, fiber optic connector in - termateability standard, 1999 for product information and a complete list of distributors, please go to our web site: www.avagotech.com avago, avago technologies, and the a logo are trademarks of avago technologies in the united states and other countries. data subject to change. copyright ? 2005-2009 avago technologies. all rights reserved. obsoletes av01-0655en av02-0620en - april 14, 2009 figure 15. mounting drawing 1,70.9 [0.070.4] 3,50.3 [0.140.01] 41,730.5 [1.640.02] 15 max [0.59] 11.6 ref [0.46] 0,35 ref [0.01] below pcb 15,250.1 [0.600.004 10,40.1 0.410.004 10 ref [0.39] to pcb 16.250.1 [0.640.004] min pitch 9,8 max [0.39] notes: 1. bail delatch is colored blue for sonet/single-mode identification. bezel area for dust cap msa specified bezel dimension are in millimeters [inches] pcb cage assembly

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