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1997 Microchip Technology Inc. DS21224A-page 1
M

24LC08B/16B MODULES

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

m

A 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)
• 2-wire serial interface bus, I

2

C



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
VSS
SDASCL
VDD
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
SDA SCL
VCC
VSS

8K/16K I

2

C

™

Serial EEPROMs in ISO Micromodules

I

2

C is a trademark of Philips Corporation.