ace24c128 ACE Technology Co., LTD., ace24c128 Datasheet - Page 4

• Manufacturer Part Number: ace24c128
• Description: Two-wire Serial Eeprom
• Manufacturer: ACE Technology Co., LTD.

Ordering information
Serial Clock (SCL):
data out of each device.
Serial Data (SDA):
wire-ORed with any number of other open-drain or open-collector devices.
Device/Page Addresses (A2, A1, A0):
hardware compatibility with other ACE24CXXX/ACE24CXXX devices. When the pins are hardwired,
as many as eight 128K/256K devices may be addressed on a single bus system (device addressing is
discussed in detail under the Device Addressing section).If the pins are left floating, the A2, A1 and A0
pins will be internally pulled down to GND if the capacitive coupling to the circuit board Vcc plane is <
3pF, if coupling is > 3pF recommends connecting the address pins to GND.
Write Protect (WP):
operations when connected to ground (GND). When the Write Protect pin is connected to Vcc. All write
operations to the memory are inhibited. If the pin is left floating, the WP pin will be internally pulled is
< 3pF , if coupling is > 3pF, recommends connecting the pins to GND. Switching WP to Vcc prior to a
write operation creates a software write protected function.
Write Protect Description
The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock
The SDA pin is bi-directional for serial data transfer. This pin is open-drain driven and may be
The A2, A1 and A0 pins are device address inputs that are hardwired or left not connected for
The ACE24C128/256 has a Write Provides hardware data protection. The WP pin allows normal write
Selection Guide
WP Pin Status
ACE24C128/256 XX
WP=GND
WP=V
CC
Full (128K) Memory
Technology
+
ACE24C128
X H
Normal Read/Write Operations
Part of the Array Protected
U : Tube
T : Tape and Reel
Halogen-free
Pb - free
DP : PDIP-8
FM : SOP-8
TM : TSSOP-8
Full (256K) Memory
ACE24C256
Two-wire Serial EEPROM
ACE24C128/256
VER 1.2
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