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M95128-RMW3

256/128 Kbit Serial SPI Bus EEPROM With High Speed Clock

STMicroelectronics 

M95256

M95128

256/128 Kbit Serial SPI Bus EEPROM

With High Speed Clock

PRELIMINARY DATA

s SPI Bus Compatible Serial Interface

s Supports Positive Clock SPI Modes

s 5 MHz Clock Rate (maximum)

s Single Supply Voltage:

– 4.5V to 5.5V for M95xxx

– 2.7V to 3.6V for M95xxx-V

– 2.5V to 5.5V for M95xxx-W

– 1.8V to 3.6V for M95xxx-R

s Status Register

s Hardware and Software Protection of the Status

Register

s BYTE and PAGE WRITE (up to 64 Bytes)

s Self-Timed Programming Cycle

s Resizeable Read-Only EEPROM Area

s Enhanced ESD Protection

s 100,000 Erase/Write Cycles (minimum)

s 40 Year Data Retention (minimum)

DESCRIPTION

These SPI-compatible electrically erasable

programmable memory (EEPROM) devices are

organized as 32K x 8 bits (M95256) and 16K x 8

bits (M95128), and operate down to 2.7 V (for the

8

1

PSDIP8 (BN)

0.25 mm frame

8

1

SO8 (MN)

150 mil width

Figure 1. Logic Diagram

VCC

14

1

TSSOP14 (DL)

169 mil width

8

1

SO8 (MW)

200 mil width

Table 1. Signal Names

C

Serial Clock

D

Serial Data Input

Q

Serial Data Output

S

Chip Select

W

Write Protect

HOLD

Hold

VCC

Supply Voltage

VSS

Ground

D

C

S

W

HOLD

M95xxx

VSS

Q

AI01789C

March 2000

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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