product selection guide parameter WS57C51C-45 WS57C51C-55 WS57C51C-70 address access time (max) 45 ns 55 ns 70 ns cs to output valid time (max) 20 ns 25 ns 30 ns WS57C51C v cc a 10 a 11 a 12 a 13 cs1/v pp cs2 cs3 cs4 o 7 o 6 o 5 o 4 o 3 a 9 a 8 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 o 0 o 1 o 2 gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 a 12 a 13 cs1/v pp cs2 cs3 cs4 nc o 7 o 6 a 5 a 4 a 3 a 2 a 1 a 0 nc o 0 o 1 a 6 a 7 a 8 a 9 v cc a 10 a 11 o 2 nc o 3 nc o 4 o 5 1 432 32 31 30 29 28 27 26 25 24 23 22 21 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 gnd top view chip carrier cerdip pin configuration 4-11 military high speed 16k x 8 cmos prom/rprom key features ultra-fast access time pin compatible with am27s51 45 ns and n82hs1281 ? low power consumption immune to latch-up fast programming up to 200 ma esd protection exceeds 2000 v general description the WS57C51C is a high performance 128k uv erasable electrically r e-p rogrammable r ead o nly m emory (rprom). it is manufactured in an advanced cmos technology which enables it to operate at bipolar prom speeds while consuming only 25% of the power required by its bipolar counterparts. a further advantage of the WS57C51C over bipolar prom devices is the fact that it utilizes a proven eprom technology. this enables the entire memory array to be tested for switching characteristics and functionality after assembly. unlike devices which cannot be erased, every ws5751c in a windowed package is 100% tested with worst case test patterns both before and after assembly. the WS57C51C provides a low power alternative to those designs which are committed to a bipolar prom footprint. it is a direct drop-in replacement for a bipolar prom of the same architecture (16k x 8). no software, hardware or layout changes need be performed. pins cs1/ cs2 cs3 cs4 v cc outputs mode v pp read v il v il v ih v il v cc d out output disable v ih xxxv cc high z output xv ih xxv cc high z disable output xxv il xv cc high z disable output xxxv ih v cc high z disable program v pp v ih xxv cc d in program verify v il v il v ih v il v cc d out mode selection return to main menu
ordering information speed package package operating wsi part number type drawing temperature manufacturing range procedure WS57C51C-45cmb 45 32 pad cllcc c2 military mil-std-883c WS57C51C-45dmb 45 28 pin cerdip, 0.6" d2 military mil-std-883c WS57C51C-45tmb 45 28 pin cerdip, 0.3" t2 military mil-std-883c WS57C51C-55cmb 55 32 pad cllcc c2 military mil-std-883c WS57C51C-55dmb 55 28 pin cerdip, 0.6" d2 military mil-std-883c WS57C51C-55tmb 55 28 pin cerdip, 0.3" t2 military mil-std-883c WS57C51C 4-12 programming/algorithms/erasure/programmers refer to page 5-1 the WS57C51C is programmed using algorithm d shown on page 5-9. notes: 9. the actual part marking will not include the initials "ws." for complete data sheet and electrical specifications see page 2-47. return to main menu
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