ACE24C04.08A

Two-wire Serial EEPROM

VER 1.2

3

Ordering Information

Selection Guide

ACE24C04/08A XX +

X

H

Pin Description

Serial Clock (SCL):

The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock

data out of each device.

Serial Data (SDA):

The SDA pin is bi-directional for serial data transfer. This pin is open-drain driven and may be

wire-ORed with any number of other open-drain or open-collector devices.

Device/Page Addresses (A2,A1)

The ACE24C04A uses the A2 and A1 inputs for hard wire addressing and a total of four 4K devices

may be addressed on a single bus system. The A0 pin is a no connect and can be connected to

ground (device addressing is discussed in detail under the Device Addressing section).

The ACE24C08A only uses the A2 input for hardware addressing and total of two 8K devices may be

addressed on a single bus system. The A0 and A1 pins are no connects and can be connected to

ground (device addressing is discussed in detail under the Device Addressing section).

Write Protect (WP):

The ACE24C04/08A has a Write Protect pin that provides hardware data protection. The Write Protect pin

allows normal read/write operations when connected to ground (GND). When the Write Protect pin is conceded

to Vcc the write protection feature is enabled.

Write Protect Description

Part of the Array Protected

WP Pin Status

ACE24C04A

ACE24C08A

Full (4K) Array

Full (8K) Array

WP=GND

Normal Read / Write Operations

Pb - free

U : Tube

T : Tape and Reel

DP : PDIP-8

FM : SOP-8

TM : TSSOP-8

Halogen - free