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1997 Microchip Technology Inc. DS21225A-page 1
M

24LC32A MODULE

FEATURES

• ISO 7816 compliant contact locations
• Single supply with operation down to 2.5V
- Maximum write current 3 mA at 6.0V
- Maximum read current 150

m

A at 6.0V
- Standby current 1

m

A max at 2.5V
• Two wire serial interface bus, I

2

C



compatible
• 100 kHz (2.5V) and 400 kHz (5V) compatibility
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• 1,000,000 ERASE/WRITE cycles



guaranteed
• 32 byte page or byte write modes available
• Schmitt trigger inputs for noise suppression
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Temperature ranges:

DESCRIPTION

The Microchip Technology Inc. 24LC32A is a 4K x 8
(32K bit) Serial Electrically Erasable PROM in an ISO
micromodule for use in smart card applications. The
device has a page-write capability of up to 32 bytes.

ISO MODULE LAYOUT
BLOCK DIAGRAM

- Commercial: 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
I/O

32K I

2

C™ Serial EEPROM in ISO Micromodule

I

2

C is a trademark of Philips Corporation.