ACE93C46.56.66

Three-wire Serial EEPROM

VER 1.5

1

Description

The ACE93C46/56/66 provides 1024/2048/4096 bits of serial electrically erasable programmable read only memory

(EEPROM) organized as 64/128/256 words of 16 bits each, when the ORG pin is connected to VCC and 128/256/512

words of 8 bits each when it is tied to ground. The ACE93C46/56/66 is available in space-saving 8-lead PDIP, 8-lead

TSSOP and 8-lead JEDEC SOIC packages. The ACE93C46/56/66 is enabled through the Chip Select pin (CS), and

accessed via a 3-wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock (SK). Upon

receiving a Read instruction at DI, the address is decoded and the data is clocked out serially on the data output pin DO.

The WRITE cycle is completely self-timed and no separate erase cycle is required before write. The Write cycle is only

enabled when it is in the Erase/Write Enable state. When CS is

brought “high” following the initiation of a write cycle, the

DO pin outputs the Ready/Busy status.

Features

 Low-voltage operation

– 1.8 (VCC=1.8V to 5.5V)

 Three-wire serial Interface

 2MHz clock rate(5V) compatibility

 Self-timed write cycle (5 ms max)

 High-reliability

– Endurance: 1 Million write cycles

Data retention: 100 Years

Packaging Type

DIP-8

SOP-8

TSSOP-8

Pin Configurations

Pin Name

Function

CS

Chip select

SK

Serial Data Clock

DI

Serial Data Input

DO

Serial Data Output

GND

Ground

Vcc

Power Supply

ORG

Internal Organization

DC

Don

’t Connect