© 1997 Microchip Technology Inc.

DS21224A-page 1

FEATURES

• ISO 7816 compliant contact locations

• Single supply with operation from 2.5-5.5V

• Low power CMOS technology

- 1 mA active current typical

- 10

µA standby current typical at 5.5V

• Organized as 4 or 8 blocks of 256 bytes

(4 x 256 x 8) or (8 x 256 x 8)

™ compatible

• Schmitt trigger inputs for noise suppression

• Output slope control to eliminate ground bounce

• 100 kHz (2.5V) and 400kHz (5V) compatibility

• Self-timed write cycle (including auto-erase)

• Page-write buffer for up to 16 bytes

• 2 ms typical write cycle time for page-write

• ESD protection > 4,000V

• 1,000,000 ERASE/WRITE cycles guaranteed

• Data retention > 200 years

• Temperature range

DESCRIPTION

The Microchip Technology Inc. 24LC08B/16B are 8K

and 16K bit Electrically Erasable PROMs in ISO mod-

ules for smart card applications. The device is orga-

nized as four or eight blocks of 256 x 8-bit memory with

a 2-wire serial interface. The 24LC08B and 24LC16B

also have a page-write capability for up to 16 bytes of

data.

ISO MODULE LAYOUT

BLOCK DIAGRAM

- Commercial (C):

0˚C to

+70˚C

SDA

SCL

HV GENERATOR

EEPROM

ARRAY

PAGE LATCHES

YDEC

XDEC

SENSE AMP

R/W CONTROL

MEMORY

CONTROL

LOGIC

I/O

CONTROL

LOGIC

SDA

SCL