ACE24C32_1 Datasheet, PDF (3/13 Pages) ACE Technology Co., LTD. – Two-wire Serial EEPROM

Technology
Ordering information
Selection Guide
ACE24C32/64 XX + X
U : Tube
T : Tape and Reel
Pb - free
DM : TDFN
ACE24C32/64
Two-wire Serial EEPROM
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, A0):
The A2, A1 and A0 pins are device address inputs that are hardwired or left not connected for
hardware compatibility with other ACE24CXX/ACE24CXX devices. When the pins are hardwired, as
many as eight 32K/64K 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):
The ACE24C32/64 has a Write Provides hardware data protection. The WP pin allows normal write 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
WP Pin Status
Part of the Array Protected
ACE24C32
ACE24C64
WP=V_CC Full (32K) Memory Full (64K) Memory
WP=GND
Normal Read/Write Operations
VER 1.3 3