Low Voltage UV EPROM and OTP EPROM
M27W256
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM
Features
■ 2.7V to 3.6V Supply Voltage in Read Operati...
Description
M27W256
256 Kbit (32Kb x 8) Low Voltage UV EPROM and OTP EPROM
Features
■ 2.7V to 3.6V Supply Voltage in Read Operation
■ Access Time:
– 70 ns at VCC = 3.0V to 3.6V
t(s) – 80 ns at VCC = 2.7V to 3.6V
■ Pin Compatible with M27C256B
uc ■ Low Power Consumption: d – 15 µA Max. Standby Current ro ) – 15 mA Max. Active Current at 5 MHz P t(s ■ Programming Time 100 µs/byte lete uc ■ High Reliability CMOS Technology d – 2,000V ESD Protection so ro – 200 mA Latchup Protection Immunity b P ■ Electronic Signature - O te – Manufacturer Code: 20h ) le – Device Code: 3dh OObbssoolleettee PPrroodduucctt((ss) - Obso ■ ECOPACK® packages available
28
1
FDIP28W (F)
28
1
PDIP28 (B)
PLCC32 (K)
TSOP28 (N) 8 x 13.4 mm
April 2006
Rev 3
1/23
www.st.com
1
Contents
Contents
M27W256
1
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Two-line output control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 System considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
t(s) 2.5 Programming . . . . . . . . . . . . . . . . . ....
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