M
24AA01/02
2 ™
1K 1.8V I C Serial EEPROM
FEATURES
PACKAGE TYPES
• Single supply with operation down to 1.8V
• Low power CMOS technology
PDIP
- 1 mA active current typical
A0
A1
1
2
8
7
VCC
WP
- 10 µA standby current typical at 5.5V
- 3 µA standby current typical at 1.8V
• Organized as a single block of 128 bytes (128 x 8)
or 256 bytes (256 x 8)
• 2-wire serial interface bus, I2C compatible
A2
3
4
6
5
SCL
SDA
• Schmitt trigger, filtered inputs for noise suppres-
sion
VSS
• Output slope control to eliminate ground bounce
• 100 kHz (1.8V) and 400 kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
SOIC
• 2 ms typical write cycle time for page-write
• Hardware write protect for entire memory
• Can be operated as a serial ROM
1
2
8
7
A0
A1
VCC
• ESD protection > 3,000V
WP
• 1,000,000 ERASE/WRITE cycles guaranteed
• Data retention > 200 years
3
4
6
5
A2
SCL
SDA
• 8-pin DIP or SOIC package
VSS
• Available for extended temperature ranges
- Commercial (C):
- Industrial (I):
0°C to +70°C
-40°C to +85°C
DESCRIPTION
BLOCK DIAGRAM
The Microchip Technology Inc. 24AA01 and 24AA02
are 1K bit and 2K bit Electrically Erasable PROMs.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.
Low-voltage design permits operation down to 1.8 volts
with standby and active currents of only 3 µA and 1 mA,
respectively.The 24AA01 and 24AA02 also have page-
write capability for up to 8 bytes of data. The 24AA01
and 24AA02 are available in the standard 8-pin DIP
and 8-pin surface mount SOIC packages.
WP
HV GENERATOR
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
EEPROM
ARRAY
XDEC
PAGE LATCHES
SDA
SCL
YDEC
VCC
VSS
SENSE AMP
R/W CONTROL
I2C is a trademark of Philips Corporation
1998 Microchip Technology Inc.
DS21052H-page 1
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