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PRELIMINARY DATA

June 1999

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

M35080

8 Kbit Serial SPI Bus EEPROM

With Incremental Registers

s

Compatible with SPI Bus Serial Interface

(Positive Clock SPI Modes)

s

Single Supply Voltage: 4.5 V to 5.5 V

s

5 MHz Clock Rate (maximum)

s

Sixteen 16-bit Incremental Registers

s

BYTE and PAGE WRITE (up to 32 Bytes)

(except for the Incremental Registers)

s

Self-Timed Programming Cycle

s

Hardware Protection of the Status Register

s

Resizeable Read-Only EEPROM Area

s

Enhanced ESD Protection

s

1 Million Erase/Write Cycles (minimum)

s

40 Year Data Retention (minimum)

DESCRIPTION

The M35080 device consists of 1024x8 bits of low

power

EEPROM,

fabricated

with

STMicroelectronics’ proprietary High Endurance

Double Polysilicon CMOS technology.

The device is accessed by a simple SPI-compati-

ble serial interface. The bus signals consist of a

serial clock input (C), a serial data input (D) and a

serial data output (Q), as shown in Table 1.

The device is selected when the chip select input

(S) is held low. Data is clocked in during the low to

high transition of the clock, C. Data is clocked out

during the high to low transition of the clock.

Figure 1. Logic Diagram

AI02143

S

VCC

M35080

VSS

W

Q

C

D

Table 1. Signal Names

C

Serial Clock

D

Serial Data Input

Q

Serial Data Output

S

Chip Select

W

Write Protect

Supply Voltage

Ground

PSDIP8 (BN)

0.25 mm frame

SO8 (MN)

150 mil width

8

1

8

1