Block Diagram

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 Maxi-

mum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the

device at these or any other conditions beyond those indi-

cated in the operational sections of this specification is not

implied. Exposure to absolute maximum rating conditions

for extended periods may affect device reliability.

Absolute Maximum Ratings*

The AT25128 is enabled through the Chip Select pin (CS)

and accessed via a 3-wire interface consisting of Serial

Data Input (SI), Serial Data Output (SO), and Serial Clock

(SCK). All programming cycles are completely self-timed,

and no separate ERASE cycle is required before WRITE.

BLOCK WRITE protection is enabled by programming the

status register with one of four blocks of write protection.

Separate program enable and program disable instruc-

tions are provided for additional data protection. Hardware

data protection is provided via the WP pin to protect

against inadvertent write attempts to the status register.

The HOLD pin may be used to suspend any serial commu-

nication without resetting the serial sequence.

Description (Continued)

2

AT25128