2

AT24C128SC/AT24C256SC

1661B–SEEPR–04/04

Figure 2. Block Diagram

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.

organized as 256/512 pages of 64-bytes each. Random word addressing requires a

14/15-bit data word address.

Absolute Maximum Ratings*

Operating Temperature

......................................−55°C to +125°C

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age to the device. This is a stress rating only;

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.

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