M27C256B-10B1X STMICROELECTRONICS [STMicroelectronics], M27C256B-10B1X Datasheet

M27C256B-10B1X

Manufacturer Part Number

M27C256B-10B1X

Description

256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

1.M27C256B-10B1X.pdf (16 pages)

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DESCRIPTION

The M27C256B is a 256 Kbit EPROM offered in

the two ranges UV (ultra violet erase) and OTP

(one time programmable). It is ideally suited for mi-

croprocessor systems and is organized as 32,768

by 8 bits.

The FDIP28W (window ceramic frit-seal package)

has a transparent lid which allows the user to ex-

pose the chip to ultraviolet light to erase the bit pat-

tern. A new pattern can then be written to the

device by following the programming procedure.

For applications where the content is programmed

only one time and erasure is not required, the

M27C256B is offered in PDIP28, PLCC32 and

TSOP28 (8 x 13.4 mm) packages.

August 2002

5V ± 10% SUPPLY VOLTAGE in READ

OPERATION

ACCESS TIME: 45ns

LOW POWER CONSUMPTION:

– Active Current 30mA at 5MHz

– Standby Current 100µA

PROGRAMMING VOLTAGE: 12.75V ± 0.25V

PROGRAMMING TIME: 100µs/word

ELECTRONIC SIGNATURE

– Manufacturer Code: 20h

– Device Code: 8Dh

256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

Figure 1. Logic Diagram

A0-A14

FDIP28W (F)

PLCC32 (C)

V CC

M27C256B

V SS

V PP

M27C256B

PDIP28 (B)

TSOP28 (N)

8 x 13.4 mm

Q0-Q7

AI00755B

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