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Agilent AFKC-xxxx Pluggable DWDM Transceiver for operation up to 2.7 Gb/s Part of the Agilent METRAK family
Data Sheet
* Optical switch and cross-connect * Metro core and access networks * Video Transport Systems Features * MSA Compliant (http://www.hotplugdwdm.org) * Low power dissipation <2 W typical * Controlled hot plugging * Mountable either through the front panel or directly on the host PCB * Integrated wavelength locker * Data rates from 155 Mb/s to 2.7 Gb/s (no internal data retiming) * Operation across C band on the 100 GHz ITU grid * Link optical power budget of 33 dB minimum * Dispersion performance allows links of up to 175 km * Compliant with SONET OC-48/ SDH STM-16 * Directly modulated, cooled, InGaAsP MQW DFB laser * High sensitivity APD based receiver * Automatic optical power control * Automatic wavelength control * Automatic internal APD bias generation and control * Received power monitor * AC-coupled CML compatible differential data input and output * Simplex LC optical connector receptacles * 70 way two-row electrical connector * Single +3.3 V power supply * Slow or fast TX_DISABLE
Description The MSA compliant transceivers are high performance, compact, cost effective modules for serial optical communications at data rates up to 2.7 Gb/s. They are designed to provide SONET/SDH compliant links at 2.488 Gb/s. They are also compatible with other standard data rates such as GbE. The optical power and receiver sensitivity allow for an optical power budget of 33 dB and the dispersion performance enables a range of link distances up to 175 km. The full range of C band wavelengths is available on the ITU 100 GHz grid. The benefits include the most compact multisourced package style available, hot pluggability and integrated power, wavelength and APD bias control. Device monitoring is provided via a 2-wire serial interface. System monitoring is via a loss of signal alarm. The transmitter section contains a cooled DFB laser and wavelength locker and has IEC 825 Class 1M and CDRH Class 1 eye safety. The receiver section uses an APD receiver for
excellent sensitivity across the whole of C band. Connectors Optical Connector Simplex LC optical connector receptacles. Electrical Connector 70 way two-row connector.
Applications * DWDM optical interfaces up to OC-48/STM-16 data rates with FEC * Optical transport platforms * Multi-service provisioning platform * Optical add/drop multiplexers
Functional Description A simplified schematic diagram of the transceiver is shown in Figure 1. The transmitter subassembly contains a directly modulated DFB, a wavelength locker, thermoelectric cooler (TEC), optical power monitor and thermistor. The microcontroller compares readings from the power monitor, wavelength locker and thermistor with factory-set values and corrects for any deviations over temperature and through life. Similarly, the bias voltage on the APD receiver is controlled to optimize datasheet performance.
Each transceiver can be individually addressed over the I2C bus (up to a limit of 8 per bus). The micro-controller can be interrogated and commands issued over the I2C bus (SDA and SCL lines). Alarms and Loss of Signal (LOS) are flagged by the appropriate pins (see Figure 4).
Package The package outline, pin out (Figures 2, 3 and 4) and rail system are compliant with the multisource agreement (www.hotplugdwdm.org). The rail system for front panel or inboard mounting provides connection to chassis ground for EMI purposes.
Tone Monitor Out
Tone In Slow Tx Disable Transmitter Sub-Assembly Laser Driver Tx Disable 2 Tx Data In
Module Enable Tx Alarm Micro Controller Rx Alarm 3 Add [2:0] SDA Bias SCL Tone Out Rx LOS APD Rx Post Amp 2 Rx Data Out
Module Sense
Figure 1. Simplified Transceiver Schematic
2
Figure 2. Mechanical Drawing
Definition of datums
Datum Description Module
A C D E H L Module Base Centre vertical plane of module Back surface of module bezel, safety hard stop Top surface of customer's PCB Leading edge of module PCB Vertical face of module hard stop, hard stop on rail
Figure 3. Detail Drawings
3
BOTTOM SIDE Pin Sequence Description 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 1 1 3 3 1 3 3 1 3 3 1 3 3 1 3 3 1 1 1 3 3 1 3 3 1 3 3 1 3 3 1 3 3 1 1 GROUND (TX) GROUND (TX) NC NC GROUND (TX) RESERVED RESERVED GROUND (TX) RESERVED RESERVED GROUND (TX) RESERVED RESERVED GROUND (TX) TX DATA (-ve) TX DATA (+ve) GROUND (TX) GROUND (TX) GROUND (RX) RESERVED RESERVED GROUND (RX) RESERVED RESERVED GROUND (RX) RESERVED RESERVED GROUND (RX) RX DATA (-ve) RX DATA (+ve) GROUND (RX) NC NC GROUND (RX) GROUND (RX)
TOP SIDE Pin Sequence Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 2 2 2 1 1 1 2 2 1 3 3 3 2 1 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2 2 2 1 1 1 VCC (TEC) VCC (TEC) VCC (TEC) GROUND (TEC) GROUND (TEC) GROUND (TEC) VCC (TX) VCC (TX) GROUND (DIGITAL) SDA SCL MODULE ENABLE VCC (DIGITAL) GROUND (DIGITAL) TX DISABLE TX ALARM TONE INPUT TONE OUTPUT RX ALARM RX LOS SLA-AD2 SLA-AD1 SLA-AD0 RESERVED RESERVED RESERVED SLOW TX DISABLE TONE MONITOR OUTPUT MODULE SENSE VCC (RX) VCC (RX) VCC (RX BIAS) GROUND (RX BIAS) GROUND (RX BIAS) GROUND (RX)
Top of the module PCB NOTE: NC RESERVED = =
Underside of the module PCB as viewed through top of module
NOT CONNECTED INTERNALLY RESERVED FOR FUTURE EXPANSION (THESE ARE "NO USER CONNECT")
Figure 4. Electrical Pad Layout and Pin Description
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Table 1. Pin Descriptions
Pin No
1:3 4:6 7:8 9
Pin Name
V CC (TEC) Gnd (TEC) V CC (Tx) Gnd (Digital)
Pin Description
Supply for TEC circuit, 3.3V5%. TEC ground. Supply for analogue Tx electronics, 3.3V5%. Connection to the (Digital) ground plane. Gnd (Digital) is common with Gnd (Tx) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF. 1 2 wire (I2C) serial data signal. The physical layer of the interface complies with the Philips specification 9397-750-00954 'The I2C Bus Specification.' The module is designed to operate in the standard data transfer mode. 2 wire (I2C) serial clock signal. The physical layer of the interface complies with the Philips specification 9397-750-00954 'The I2C Bus Specification.' The module is designed to operate in the standard data transfer mode. With the module plugged in the microcontroller is powered on by default, and always accessible. Connect Module Enable to +3.3V TTL logic high to enable the remaining on board electronics, and connect to TTL logic low to disable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled down to ground via 100k:. Supply for digital electronics, 3.3V5% Connection to the (Digital) ground plane. Gnd (Digital) is common with Gnd (Tx) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF. 1 Connect Tx Disable to +3.3V TTL logic high to disable the transmitter optical output and connect it to TTL logic low to enable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled up to Vcc via 100k:. Tx Alarm is flagged when an Alarm or Warning condition associated with the transmitter is encountered. In normal operation Tx Alarm is at TTL logic low, in a fault condition it is at +3.3V TTL logic high. For detailed operation see the truth tables in the Applications Note. Low frequency tone injection input. Internally ac coupled, with a 10k: input impedance. If unused this input should be connected to ground. See the Applications Note for further description. Low frequency tone recovery output. Internally ac coupled designed to drive a high impedance input, minimum 1k:. The output signal is dependent on received power and modulation depth. Rx Alarm is flagged when an alarm or warning condition associated with the receiver is encountered. In normal operation Rx Alarm is at TTL logic low, in a fault condition it is at +3.3V TTL logic high. For detailed operation see the truth tables in the Applications Note. LOS is a loss of power warning. On a modulated signal the LOS warning is asserted and de-asserted at the power levels specified in this data sheet. When asserted LOS will be at +3.3 V TTL logic high, when de-asserted it will be at TTL logic low.. Slave address bits that define the address of the module on the I2C Bus. Configured external to the module by the customer using +3.3V TTL logic levels.
10
SDA
11
SCL
12
Module Enable
13 14
V CC (Digital) Gnd (Digital)
15
TX_Disable
16
TX_Alarm
17
Tone Input
18
Tone Output
19
RX_Alarm
20
RX_LOS
21:23
SLA-AD2 SLA-AD1 SLA-AD0 Vendor Reserved Slow TX_Disable
24:26 27
Reserved for vendor specific functions. Do not connect Connect Tx Disable to +3.3V TTL logic high to disable the transmitter optical output and connect it to TTL logic low to enable. For detailed operation see the truth tables in the Applications Note. LVTTL interface internally pulled down to ground via 100k:. Slow TX_Disable can be used to switch off the laser with the power reducing from 90% to 10% of its operational value in >150 s and <1 ms. The tone monitor output provides a DC voltage proportional to the laser modulation current and an AC pkpk signal proportional to the tone current. This pin can be used to control the signal applied to the tone input and so maintain the modulation depth at the desired level.
28
Tone Monitor Output
5
Table 1. Pin Descriptions (continued)
Pin No
29
Pin Name
Module Sense
Pin Description
Internally pulled to ground via 1k:. Can be used by the customer to identify that a module has been plugged into the socket. Supply for the receiver analogue electronics, 3.3V5% Supply for the APD bias generator, 3.3V5%. Connection to the (Rx Bias) ground plane. This is an independent ground plane inside the module. 1 Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Not connected internally. Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Received data output +Internally ac coupled data outputs. CML compatible. Received data output -Internally ac coupled data outputs. CML compatible. Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Reserved for future functions, do not connect. Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Reserved for future functions, do not connect. Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Reserved for future functions, do not connect. Connection to the (Rx) ground plane. This is an independent ground plane inside the module. 1 Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Transmit data + Internally ac coupled and terminated. CML compatible. Transmit data - Internally ac coupled and terminated. CML compatible. Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Reserved for future functions, do not connect. Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Reserved for future functions, do not connect. Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Reserved for future functions, do not connect. Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1 Not connected internally. Connection to the (Tx) ground plane. Gnd (Tx) is common with Gnd (Digital) inside the module, this is ac coupled to the chassis ground with a capacitance of 100nF.1
30:31 32 33:34 35:37 38:39 40 41 42 43 44:45 46 47:48 49 50:51 52 53:54
VCC (Rx) VCC (Rx Bias) Gnd (Rx Bias) Gnd (Rx) NC Gnd (Rx) Rx Data (+ve) Rx Data (-ve) Gnd (Rx) Reserved Gnd (Rx) Reserved Gnd (Rx) Reserved Gnd (Rx) Gnd (Tx)
55 56 57
Tx data (+ve) Tx data (-ve) Gnd (Tx)
58:59 60
Reserved Gnd (Tx)
61:62 63
Reserved Gnd (Tx)
64:65 66
Reserved Gnd (Tx)
67:68 69:70
NC Gnd (Tx)
Note: Refer to relevant section of Applications note for recommended filter circuits and control and monitor functions truth table. 1. By maintaining separate signal and chassis grounds inside the module the user has maximum flexibility to couple the ground planes outside the module as appropriate to their system. If signal and chassis ground are required to be kept separate then the pins attaching the rail mechanism to the PCB should not be connected to signal ground.
6
Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parameter in isolation, all other parameters having values within the recommended operating conditions. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time. Exposure to the absolute maximum ratings for extended periods can adversely affect device reliability.
Parameter
Storage temperature Relative humidity (Non-condensing) Power supply voltage Data input voltage Receiver optical input power
Symbol
TS RH VCC VI PMAX
Minimum
-40 0 -0.5 -0.5
Typical
Maximum
+85 85 3.6 VCC +8
Units
C % V V dBm
Notes
1
Recommended Operating Conditions
Parameter
Case temperature Power supply voltage Power supply noise tolerance Slow TX + TX disable input voltage - low Slow TX + TX disable input voltage - high Module enable input voltage - low Module enable input voltage - high 0.8 VCC 0.8 VCC 0.15 VCC
Symbol
TC VCC PSNT
Minimum
-5 3.135
Typical
3.3
Maximum
+75 3.465 100 0.15 VCC
Units
C V mVPP V V V V
Notes
2,3
4 5, 6 5, 6 6 6
Transmitter Electrical Characteristics (Note 7)
Parameter
TX supply current (VCC TX) TEC supply current (VCC TEC) Digital supply current (V CC DIGITAL) Power dissipation TX Data input voltage (differential) TX ALARM output voltage - low TX ALARM output voltage - high TX disable assert time Slow TX Disable assert time
Symbol
ICC TX ICC TEC ICC DIGITAL PDISS VID
Minimum
Typical
Maximum
170 550 15
Units
mA mA mA W mVPP V V
Notes
8
1.1 400
2.3 1000 0.25
9 10 6 6 11 11
VCC - 0.5 10 150 1000
s s
Notes: 1. Duration of exposure to be less than 24 hours. 2. For details of recommended air flow and ambient temperature refer to Application Note. 3. See drawing for maximum case temperature point. 4. Between 10 Hz and 1 MHz and with required filter. 5. Laser is switched off when TX Disable is high. 6. For input current < 100 A. 7. Over specified case temperature range, power supply voltage range at end of life @ OC-48. 8. Maximum current in steady state max case temperature. Maximum current during warm up is 850 mA. 9. Maximum power dissipation is defined at worst case end of life, which maximum dissipation for every components, steady state currents and 75C case temperature. 10. Internally ac coupled and terminated (100 W). 11. Disable assert time is time taken to go from 90% to 10% of operational TX optical power.
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Receiver Electrical Characteristics (Note 7)
Parameter
RX supply current (V CC RX) APD supply current (VCC RX BIAS) Power dissipation RX DATA (CML differential) RX DATA (CML single ended) Data output Rise and fall time (20% to 80%) LOS low LOS high (asserted) LOS assert time Logic low to high LOS deassert time Logic high to low
Symbol
ICC RX ICC RX BIAS PDISS VDIFF VSE Tr/Tf LOSD LOSA tALOS tDLOS
Minimum
Typical
Maximum
240 70
Units
mA mA W mV mV ps V V
Notes
0.75 640 320 800 400
1.0 1000 500 150 0.25
9 12 12 12 13, 14 13, 14
VCC - 0.5 2.3 100 100
us us
Transmitter Optical Characteristics (Note 7)
Parameter
Data rate Average optical output power Optical extinction ratio Spectral side mode suppression ratio Relative intensity noise Optical output eye diagram Central frequency Channel spacing Deviation from central frequency Spectral characteristics under modulation ( -20 dB line width) Jitter generation
Symbol
PAVG ER SMSR RIN
Minimum
155 3 8.2 30
Typical
4.5 9.0
Maximum
2700 6
Units
Mb/s dBm dB dB
Notes
15
-140
dB/Hz
16
Compliant with eye mask Telcordia GR-253-CORE and ITU-T G.957 f0 'f 'O20 pk to pk RMS 196.1-0.1 i 100 6 0.2 0.4 70 7 2 -24 -40 THz GHz GHz nm mUI mUI dB dB dBm 18 19 20 17
Dispersion penalty Back reflection sensitivity Optical output power in 'off' state
DP
Notes: 12. Data outputs are internally ac coupled and require external termination at the inputs of the receiving equipment via a 100 W differential load. 13. LOS is LVTTL compatible. For multirate applications LOS may be detected for long "all-zeros" patterns. 14. For output current <2.5 mA, 15. Information on operation at 9 data rates below 155 Mb/s available on request. 16. Measured in the frequency range 100 MHz to 3 GHz. 17. ITU grid, i from 0 to 4. 18. Measured with 223-1 PRBS, 10-10 BER at 2.48832 Gb/s for link distances up to 110km (AFKC-XXXXD) and 175km (AFKC-xxxxE), over standard single mode fiber with maximum dispersion as defined in ITU-T G.957, Fig A.2 for G.652 fiber. 19. With no degradation of BER. 20. With TX disable asserted and/or module enable de-asserted.
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Receiver Optical Characteristics (Note 7)
Parameter
Data rate Optical input power LOS Deassert LOS Assert LOS Hysteresis Receiver optical reflectance Wavelength range
Symbol
PR PD PA PD - PA ROR
Minimum
155 -30
Typical
Maximum
2700 -6 -33
Units
Mb/s dBm dBm dBm
Notes
21 22
-45 0.5 4 -27 1500 1580
dB dB nm 23
Tone Parameter
Input Voltage Output Voltage Modulation Frequency Monitor Output Tone Penalty
Symbol
Minimum
0 0 50 0
Typical
Maximum
2.0 2.5 500 2.0 0.5
Units
VPP VPP kHz V dB
Notes
24 25 26 27 28
Serial Interface The physical layer of the interface complies with the Philips I2C Bus Specification. Addressing, command structure, static data, diagnostic monitoring, alarms and warnings are all MSA compliant. Electrical Characteristics
Parameter
I2C interface (SCL and SDA) I2C interface (SDA output)
Symbol
VIL VIH VOL VOH
Minimum
0 0.7 VCC 0 VCC - 0.5
Typical
Maximum
0.3 VCC VCC 0.5 VCC
Units
V V V V
Notes
29 29 29 29
Monitor Functions available over the Serial Interface
Parameter
Laser temperature Module temperature Laser bias current Laser modulation current TEC current Tx optical power Rx optical power APD bias voltage LOS Wavelength Start-up time-out Yes Yes (Note 30) Yes Yes If outside normal operating limits Note 31 If >50 GHz from ITU frequency If start time high Shut down Tx only Shut down Tx only If high If high Shut down Rx only
Monitor
Yes Yes Yes Yes
Warning
If low/high If high
Alarm
If low/high
Alarm Action
Shut down Tx and Rx
If high If low/high Shut down Tx only
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Notes: 21. Operation at 2.7 Gb/s and at data rates below 155 Mb/s at reduced sensitivity. Information available on request. 22. At 2.48832 Gb/s and 10 -10 error rate with a PRBS 223-1 input, with a TX source ER of 8.2 dB. 23. Results up to 1610 nm available on request. 24. 1 volt pk-pk input produces approximately 12% mod depth. Mod depth is defined at the optical output as 100*(pk-pk tone /average output power). 25. Tone output voltage. Output swing is dependent on level of optical input. Under fixed optical input conditions the output variation due to mod depth is linear. 26. Modulation frequency. -3 dB bandwidth. 27. The monitor output gives a DC voltage proportional to the modulation current and an AC pk-pk signal proportional to the tone current. Eg if DC level is 1 volt and AC signal is 120 mV then the tone is 12% of the modulation current. This pin is used by the customer to control the signal applied to the tone input and thereby adjust the mod depth to the desired level. 28. For modulation depth of 6% or less, at 2.48832 Gb/s and 10-10 error rate with a PRBS 223-1 input.. 29. 2-wire serial interfaces each require an external 4.7 k to 10 k pull up resistor to VCC. 30. Accurate to within 1.5 dB. 31. TX ALARM signal is high throughout the module's start up sequence.
10
Ordering Information
Code Link Distance (km)
110 175
DWDM Transceiver AFKC-x x x x x
D E
Code
9610 9600 9590 9580 9570 9560 9550 9540 9530 9520 9510 9500 9490 9480 9470 9460 9450 9440 9430 9420 9410 9400 9390 9380 9370
Frequency (THz)
196.10 196.00 195.90 195.80 195.70 195.60 195.50 195.40 195.30 195.20 195.10 195.00 194.90 194.80 194.70 194.60 194.50 194.40 194.30 194.20 194.10 194.00 193.90 193.80 193.70
Wavelength (nm)
1,528.77 1,529.55 1,530.33 1,531.12 1,531.90 1,532.68 1,533.47 1,534.25 1,535.04 1,535.82 1,536.61 1,537.40 1,538.19 1,538.98 1,539.77 1,540.56 1,541.35 1,542.14 1,542.94 1,543.73 1,544.53 1,545.32 1,546.12 1,546.92 1,547.72
Code
9360 9350 9340 9330 9320 9310 9300 9290 9280 9270 9260 9250 9240 9230 9220 9210 9200 9190 9180 9170 9160 9150 9140 9130 9120
Frequency (THz)
193.60 193.50 193.40 193.30 193.20 193.10 193.00 192.90 192.80 192.70 192.60 192.50 192.40 192.30 192.20 192.10 192.00 191.90 191.80 191.70 191.60 191.50 191.40 191.30 191.20
Wavelength (nm)
1,548.51 1,549.32 1,550.12 1,550.92 1,551.72 1,552.52 1,553.33 1,554.13 1,554.94 1,555.75 1,556.55 1,557.36 1,558.17 1,558.98 1,559.79 1,560.61 1,561.42 1,562.23 1,563.05 1,563.86 1,564.68 1,565.50 1,566.31 1,567.13 1,567.95
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Related Products AFKA-0006 Evaluation accessories for AFKC-XXXXD and AFKC-xxxxE. Consists of evaluation board, cables and GUI.
www.agilent.com/ semiconductors
For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6756 2394 India, Australia, New Zealand: (+65) 6755 1939 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (+65) 6755 2044 Taiwan: (+65) 6755 1843 Data subject to change. Copyright (c) 2004 Agilent Technologies, Inc. Obsoletes 5988-9525EN July 12, 2004 5989-1067EN

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