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1997 Microchip Technology Inc. DS21222A-page 1
M

24LC01B/02B MODULES

FEATURES

• ISO 7816 Compliant pad locations
• Low power CMOS technology
- 1 mA active current typical
- 10

m

A standby current typical at 5.5V
• Organized as a single block of 128 bytes (128 x 8)
or 256 bytes (256 x 8)
• 2-wire serial interface bus, I

2

C™ compatible
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
• 2 ms typical write cycle time for page-write
• ESD protection > 4 kV
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
• Temperature ranges available:

DESCRIPTION

The Microchip Technology Inc. 24LC01B and 24LC02B
are 1K-bit and 2K-bit Electrically Erasable PROMs in
ISO modules for smart card applications. The devices
are organized as a single block of 128 x 8-bit or 256 x
8-bit memory with a two-wire serial interface. The
24LC01B and 24LC02B also have page-write capabil-
ity for up to 8 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

1K/2K I

2

C

™

Serial EEPROMs in ISO Micromodules