View MA15530CC_7722229.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

eroflex circuit t echnology C data bus modules for the future ? scd15330 rev a 3/16/99 features ? mil-std-1553 compatible ? 1.25 megabit/sec maximum data rate ? sync identification and lock-in ? clock recovery ? manchester ii encode / decode ? separate encoder and decoder sections ? low operating power ? military temperature range -55c to +125c ? monolithic C single chip C construction ? available in commercial and industrial temperature ranges ? several package and quality options (consult factory for details) ? direct replacement for the obsolete harris hd15530-9/-2/8 and gec plessey marconi ma15530 / mas15530 parts 1 general description the ma15530 is a high performance cmos integrated circuit used to implement mil-std-1553 and similar manchester ii encoded, time division multiplexed, serial data protocols. the device is divided into two independent sections, encoder and decoder, with a common master reset. the function of the encoder section is to produce the sync pulse and parity bit, and encode the data bits. the decoder section recognizes the sync pulse, decodes the data bits and checks for parity. the mas15530 is fully guaranteed to support the 1 mhz data rate of mil-std-1553 over the full temperature and supply voltage ranges. the device interfaces with cmos, ttl or n-channel support circuitry and operates from a standard 5 volt supply. the circuit can also be used in many party line digital data communications applications where high reliability command and control signals are required. using aeroflex transceivers products (4400 series) the bit error rates (ber) and word error rates (wer) of mil-std-1553 can be achieved (refer to mil-std-1553 multiplex applications handbook "mil-hdbk-1553"). cmos manchester encoder / decoder circuit technology www.aeroflex.com v dd encoder clock send clock in send data sync select encoder enable serial data in bipolar one out output inhibit bipolar zero out ? 6 out master reset valid word encoder shift clock take data serial data out decoder clock bipolar zero in bipolar one in unipolar data in decoder shift clock command/data sync decoder reset v ss figure 1: pin assignments 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 ma15530
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 2 master reset vss send clock in ? 6 out v dd output inhibit ? 6 encoder clock bit former character send data send data in encoder enable sync select encoder shift clock bipolar one out bipolar zero out 23 14 22 13 12 21 2 18 19 20 15 17 16 24 8 6 3 4 1 9 5 7 10 13 11 unipolar data in bipolar one in bipolar zero in decoder clock master reset command / data sync take data serial data out valid word decoder shift clock decoder reset finder transition counter check parity identifier character figure 2: encoder block diagram figure 3: decoder block diagram clock bit rate synchronizer bit counter ? 2
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 3 pin designations pin input output enc dec function comment 1 33 valid word a 'high' signals the receipt of a valid word 2 33 encoder shift clock shifts data into the encoder on a 'low' to 'high' transition 3 33 take data 'high' during data reception after the sync pulse is identified 4 33 serial data out nrz output of received data 5 33 decoder clock clock for the transition finder and synchronizer which generates the clock for the rest of the decoder 6 33 bipolar zero in should be 'high' when the bus is in a negative state. must be tied 'high' when the unipolar input is used 7 33 bipolar one in should be 'high' when the bus is in a positive state. must be tied 'low' when the unipolar input is used 8 33 unipolar data in input for unipolar data to the transition finder. must be tied 'low' when not used 9 33 decoder shift clock provides the decoder clock divided by 12, synchronized by the recovered serial data 10 33 command/data sync this output indicates the type of synchronizing character received as follows: if a data synchronizing character was received, this pin is low while the data is decoded. if a command synchronizing character was received, this pin is high during data decoding 11 33 decoder reset a 'high' during a decoder shift clock rising edge resets the bit counter 12 CC 33 v ss ground 13 333 master reset a 'high" clears the counters in both sections 14 33 ? 6 out provides the encoder clock divided by 6 15 33 bipolar zero out provides an active 'low' output to the zero or negative sense of a bipolar line driver 16 33 output inhibit a 'low' inhibits the bipolar zero ou t and bipolar one out by forcing them to inactive, 'high', states 17 33 bipolar one out provides an active 'low' output to the one or positive sense of a bipolar line driver 18 33 serial data in receives serial data at the rate of the encoder shift clock 19 33 encoder enable a 'high' starts the encode cycle provided that the previous cycle is complete 20 33 sync select a 'high' selects the command sync and a 'low' selects the data sync 21 33 send data provides an active 'high' to enable the external serial data source 22 33 send clock in clock input at 2 times the data rate 23 33 encoder clock input to the divide by 6 circuit 24 CC 33 v dd positive supply figure 4: pin designations
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 4 dc characteristics and ratings absolute maximum ratings parameter min max units v dd 37 v input voltage vss - 0.3 v dd + 0.3v v operating temperature -55 +125 c storage temperature -65 +150 c figure 5: absolute maximum ratings dc characteristics sym parameter min typ max units test conditions v ih logic "1" input voltage 70%v dd -- v v il logic "0" input voltage - - 30%v dd v v ihc logic "1" input voltage (clock) v dd - 0.5v - - v v ilc logic "0" input voltage (clock) - - v ss + 0.5v v i il input leakage current -1.0 +1.0 a 0v < v in < v dd v oh logic "1" output voltage 2.4 - - v i oh = -3 ma v ol logic "0" output voltage - - 0.4 v i ol = 1.8 ma i ddsb standby supply current - 0.5 2.0 ma output open v in = v dd = 5.5v i ddop operating supply current - 8.0 10.0 ma v dd = 5.5v, f = 1mhz c in input capacitance - 5.0 7.0 pf c out output capacitance - 8.0 10.0 pf v dd = 5v 10%, over full operating temperature range. figure 6: dc characteristics
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 5 ac characteristics sym parameter limits figure 7: encoder electrical characteristics min max units f ec encoder clock frequency 015mhz f esc send clock frequency 02.5mhz t ecr encoder clock rise time -8ns t ecf encoder clock fall time -8ns f ed data rate 01.25mhz t mr master reset pulse width 150 - ns t e 1 shift clock delay - 125 ns t e 2 serial data setup time 75 - ns t e 3 serial data hold time 75 - ns t e 4 enable setup time 90 - ns t e 5 enable pulse width 100 - ns t e 6 sync setup time 55 - ns t e 7 sync pulse width 150 - ns t e 8 send data delay 050ns t e 9 bipolar output delay - 130 ns 1. v dd = 5v 10%, over full operating temperature range. 2. c l =50pf. sym parameter limits figure 8: decoder electrical characteristics min typ max units f dc decoder clock frequency 0-15mhz t dcr decoder clock rise time --8mhz t dcf decoder clock fall time --8ns f dd data rate 0 - 1.25 mhz t dr decoder reset pulse width 150 - - ns t drs decoder reset setup time 75 - - ns t mr master reset pulse width 150 - - ns t d 1 bipolar data pulse width t dc + 10 - - ns t d 2 sync transition span -18t dc -ns t d 3 one-zero overlap --t dc - 10 ns t d 4 short data transition span -6t dc -ns t d 5 long data transition span -12t dc -ns t d 6 sync delay (on) -20 - 110 ns t d 7 take data delay (on) 0 - 110 ns t d 8 serial data out delay - - 80 ns t d 9 sync delay (off) 0 - 110 ns t d 10 take data delay (off) 0 - 110 ns t d 11 valid word delay 0 - 110 ns 1. v dd = 5v 10%, over full operating temperature range. 2. c l =50pf. 3. t dc = decoder clock period = 1/f dc
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 6 encoder operation the encoder requires a single clock with a frequency of twice the desired data rate applied at the send clock input. an auxiliary divide by six counter is provided on chip which can be utilised to produce the send clock by dividing the decoder clock. the encoder's cycle begins when encoder enable is high during a failing edge of encoder shift clock ? . this cycle lasts for one word length or twenty encoder shift clock periods. at the next low-to-high transition of the encoder shift clock, a high at sync select input actuates a command sync or a low will produce a data sync for that word - . when the encoder is ready to accept data, the send data output will go high and remain high for sixteen encoder shift clock periods ? . during these sixteen periods the data should be clocked into the serial data input with every low-high transition of the encoder shift clock ? - . after the sync and the manchester ii coded data are chip transmitted through the bipolar one and bipolar zero outputs, the encoder adds on an additional bit which is the parity for that word . at any time a low in output inhibit input will force both bipolar outputs to a high state but will not affect the encoder in any other way. to abort the encoder transmission a positive pulse must be applied at master reset. anytime after or during this pulse, a low to high transition on send clock clears the internal counters and initializes the encoder for a new word. figure 9: encoder operation
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 7 figure 10: decoder operation decoder operation the decoder requires a single clock with a frequency of 12 times the desired data rate applied at the decoder clock input. the manchester ii coded data can be presented to the decoder in one of two ways. the bipolar one and bipolar zero inputs will accept data from a comparator sensed transformer coupled bus as specified in mil-std-1553. the unipolar data input can only accept non-inverted manchester ii coded data (e.g.from bipolar zero out of an encoder). the decoder is free running and continuously monitors its data input lines for a valid sync character and two valid manchester data bits to start an output cycle.. when a valid sync is recognized ? , the type of sync is indicated on command/data sync output. if the sync character was a command sync, this output will go high - and remain high for sixteen decoder shift clock periods ? , otherwise it will remain low. the take data output will go high and remain high - - ? while the decoder is transmitting the decoded data through serial data out. the decoded data available at serial data out is in a nrz format. the decoder shift clock is provided so that the decoded bits can get shifted into an external register on every low-to-high transition of this clock - - ? . after all sixteen decoded bits have been transmitted ? the data is checked for odd parity. a high on valid word output indicates a successful reception of a word without any manchester or parity errors. at this time the decoder is looking for a new sync character to start another output sequence. at any time in the above sequence, a high input on decoder reset during a low-to-high transition of decoder shift clock will abort transmission and initialize the decoder to start looking for a new sync character.
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 8 figure 11: encoder timing diagram
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 9 figure 12: decoder timing diagram bipolar zero in = 1 notes: 1. unipolar in = 0 2. bipolar one in = 0
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 10 figure 13: decoder timing details
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 11 figure 14: character formats figure 15: word formats
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 12 figure 16: 24-lead ceramic dil (solder seal) - package style c
aeroflex circuit technology scd15530 rev a 3/16/99 plainview ny (516) 694-6700 13 figure 17: 24-lead ceramic flatpack (solder seal) - package style cf
aeroflex circuit technology scd15330 rev a 3/16/99 plainview ny (516) 694-6700 14 ordering information model number part number ma15530xx see below or contact factory circuit technology specifications subject to change without notice. aeroflex circuit technology 35 south service road plainview new york 11803 telephone: (516) 694-6700 fax: (516) 694-6715 toll free inquiries: 1-(800)the-1553 part number breakdown ma15530 x x package type c ceramic dil (figure 16) cf flatpack (figure 17) l lcc * n naked die * p plastic dip * rel level b class b operating temperature (figure 5) -55c to +125c c commercial (0c to+70c) i industrial (-40c to +85c) s space * * contact factory for details

▲Up To Search▲

Price & Availability of MA15530CC

	To Download MA15530CC Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .