at24c64b ATMEL Corporation, at24c64b Datasheet - Page 2

• Manufacturer Part Number: at24c64b
• Description: 2-wire Serial Eeprom 64k 8192 X 8
• Manufacturer: ATMEL Corporation

Absolute Maximum Ratings*
1. Block Diagram
2. Pin Description
2
Operating Temperature...................................... -55 to +125°C
Storage Temperature ......................................... -65 to +150°C
Voltage on Any Pin
with Respect to Ground ....................................... -1.0 to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
AT24C64B
GND
VCC
SDA
SCL
WP
A
A
A
2
1
0
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 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 (A2, A1, A0): The A2, A1 and A0 pins are device address inputs that are
hard wired or left not connected for hardware compatibility with other AT24CXX devices. When
the pins are hardwired, as many as eight 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 cou-
D
IN
COMPARATOR
START
LOGIC
ADDRESS
STOP
DEVICE
LOAD
D
OUT
R/W
ADDR/COUNTER
DATA WORD
COMP
LOAD
Y DEC
*NOTICE:
CONTROL
SERIAL
LOGIC
INC
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
EN
H.V. PUMP/TIMING
DATA RECOVERY
SERIAL MUX
EEPROM
D
LOGIC
OUT
/ACK
3350E–SEEPR–9/07