ACE24C04/08A
Two-wire Serial EEPROM
Ordering Information
ACE24C04/08A XX + X H
Halogen - free
U : Tube
T : Tape and Reel
Pb - free
DP : DIP-8
FM : SOP-8
TM : TSSOP-8
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
WP Pin Status
WP=V
CC
WP=GND
Part of the Array Protected
ACE24C04A
ACE24C08A
Full (4K) Array
Full (8K) Array
Normal Read / Write Operations
VER 1.5
3
ACE [ ACE TECHNOLOGY CO., LTD. ]
