AT24C02B Datasheet, PDF (2/26 Pages) ATMEL Corporation – Two-wire Serial EEPROM

Absolute Maximum Ratings
Operating Temperature ................................ –55C to +125C
Storage Temperature.................................... –65C to +150C
Voltage on Any Pin
with Respect to Ground ....................................–1.0V 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.
Figure 0-1.
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
1. 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/PAGE ADDRESSES (A2, A1, A0): The A2, A1 and A0 pins are device address inputs
that are hard wired for the AT24C02B. As many as eight 2K devices may be addressed on a sin-
gle bus system (device addressing is discussed in detail under the Device Addressing section).
WRITE PROTECT (WP): The AT24C02B has a write protect pin that provides hardware data
protection. The write protect pin allows normal read/write operations when connected to ground
2 AT24C02B
5126H–SEEPR–8/07