product selection guide parameter WS57C191C/291c-35 WS57C191C/291c-45 WS57C191C/291c-55 address access time (max) 35 ns 45 ns 55 ns cs to output valid time (max) 20 ns 20 ns 20 ns military high speed 2k x 8 cmos prom/rprom key features ultra-fast access time pin compatible with am27s191/291 ? t acc = 35 ns and n82s191 bipolar proms ? cs = 20 ns immune to latch-up low power consumption ?up to 200 ma fast programming esd protection exceeds 2000v available in 300 and 600 mil dip general description the WS57C191C/291c is an extremely high performance 16k 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. the WS57C191C/291c is also configured in the standard bipolar prom pinout which provides an easy upgrade path for systems which are currently using bipolar proms. the WS57C191C is packaged in a conventional 600 mil dip package. the ws57c291c is packaged in a space saving 300 mil dip package configuration. WS57C191C/291c pins cs1/v pp cs2 cs3 v cc outputs mode read v il v ih v ih v cc d out output disable v ih xxv cc high z output xv il xv cc high z disable program v pp xxv cc d in program verify v il v ih v ih v cc d out output disable xxv il v cc high z v cc a 8 a 9 a 10 cs1/v pp cs2 cs3 o 7 o 6 o 5 o 4 o 3 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 24 23 22 21 20 19 18 17 16 15 14 13 top view cerdip mode selection pin configuration 4-3 return to main menu
ordering information speed package package operating wsi part number (ns) type drawing temperature manufacturing range procedure WS57C191C WS57C191C-35dmb 35 24 pin cerdip, 0.6" d1 military mil-std-883c WS57C191C-45dmb 45 24 pin cerdip, 0.6" d1 military mil-std-883c WS57C191C-55dmb 55 24 pin cerdip, 0.6" d1 military mil-std-883c ws57c291c ws57c291c-35tmb 35 24 pin cerdip, 0.3" t1 military mil-std-883c ws57c291c-45tmb 45 24 pin cerdip, 0.3" t1 military mil-std-883c ws57c291c-55tmb 55 24 pin cerdip, 0.3" t1 military mil-std-883c WS57C191C/291c 4-4 programming/algorithms/erasure/programmers refer to page 5-1 note: 9. the actual part marking will not include the initials "ws." the WS57C191C and ws57c291c are programmed using algorithm d shown on page 5-9. for complete data sheet and electrical specifications see page 2-7. return to main menu
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