b28v201/808 1/2 complete data available on data-on-disc cd-rom or at www.st.com M28W201 2 mbit (256kb x8, bulk) low voltage flash memory data briefing 2.7v to 3.6v supply voltage 12v programming voltage fast access time: 100ns byte programming time: 10 m s typical (presto f algorithm) electrical chip erase in 1s range low power consumption active current: 15ma max. stand-by current: 7 m a typ. 10,000 program/erase cycles integrated erase/program-stop timer otp compatible packages and pinouts 20 years data retention defectivity below 1ppm/year electronic signature manufacturer code: 20h device code: f5h description the M28W201 flash memory product is a non- volatile memories which may be erased electrically at the chip level and programmed byte-by-byte. it is organised as 256 kbytes. it uses a command register architecture to select the operating modes and thus provide a simple microprocessor inter- face. the device is offered in plcc32 and tsop32 (8 x 20mm) package. ai02060 18 a0-a17 w dq0-dq7 v pp v cc M28W201 g e v ss 8 logic diagram plcc32 (k) a0 - a17 address inputs dq0 - dq7 data inputs / outputs e chip enable g output enable w write enable v pp program supply v cc supply voltage v ss ground signal names tsop32 (n) 8 x 20 mm
2/2 a1 a0 dq0 a7 a4 a3 a2 a6 a5 a13 a10 a8 a9 dq7 a14 a11 g e dq5 dq1 dq2 dq3 dq4 dq6 a17 w a16 a12 v pp v cc a15 ai02062 M28W201 (normal) 8 1 9 16 17 24 25 32 v ss tsop pin connections M28W201 ai02061 a17 a13 a10 dq5 17 a1 a0 dq0 dq1 dq2 dq3 dq4 a7 a4 a3 a2 a6 a5 9 w a8 1 a16 a9 dq7 a12 a14 32 v pp v cc M28W201 a15 a11 dq6 g e 25 v ss lcc pin connections example: M28W201 -150 n 1 tr operating voltage w 2.7v to 3.6v speed -100 (1) 100ns -120 120ns -150 150ns -200 200ns package k plcc32 n tsop32 8 x 20mm temp. range 1 0 to 70 c 5 20 to 85 c 6 40 to 85 c option tr tape & reel packing notes: 1. this speed is obtained with a supply voltage range of v cc = 3.3v 0.3v and a load capacitance at 30pf. devices are shipped from the factory with the memory content erased (to ffh). ordering information scheme for a list of available options or for further informa- tion on any aspect of this device, please contact the stmicroelectronics sales officenearest to you.
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