AT24C64B_07 Datasheet, PDF (2/16 Pages) ATMEL Corporation – 2-Wire Serial EEPROM 64K (8192 x 8)

Absolute Maximum Ratings*
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
*NOTICE:
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.
1. Block Diagram
VCC
GND
WP
SCL
SDA
A₂
A₁
A₀
START
STOP
LOGIC
LOAD
DEVICE
ADDRESS
COMPARATOR
SERIAL
CONTROL
EN
H.V. PUMP/TIMING
LOGIC
COMP
LOAD INC
DATA RECOVERY
R/W DATA WORD
ADDR/COUNTER
EEPROM
D_IN
D_OUT
Y DEC
SERIAL MUX
D_OUT/ACK
LOGIC
2. 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 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-
2 AT24C64B
3350E–SEEPR–9/07