ACE24C256C Datasheet, PDF (3/20 Pages) ACE Technology Co., LTD. – Two-wire serial EEPROM

Block Diagram
ACE24C256C
Two-wire serial EEPROM
Pin Descriptions
Serial Clock (SCL): The SCL input is used to positive-edge clock data in and negative-edge clock data
out of each device.
Serial Data (SDA): The SDA pin is bidirectional 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 Addresses (E2, E1, E0): The E2, E1, and E0 pins are device address inputs. Typically, the E2,
E1, and E0 pins are for hardware addressing and a total of 8 devices can be connected on a single bus
system. If these pins are left floating, the E2, E1, and E0 pins will be internally pulled down to GND.
Write Control (WCB): The Write Control input, when WCB is connected directly to V_CC, all write
operations to the memory are inhibited. When connected to GND, allows normal write operations. If the
pin is left floating, the WCB pin will be internally pulled down to GND.
Pin Capacitance
Test Conditions: T_A = 25°C, F = 1MHz, V_CC = 5.0V.
Symbol
Parameter
C_I/O
Input/Output Capacitance (SDA)
C_IN
Input Capacitance (E0,E1,E2,WCB,SCL)
Max Units
8
pF
6
pF
Test Condition
V_I/O=GND
V_IN=GND
VER 1.2 3