1996 Microchip Technology Inc.

Preliminary

DS21162B-page 1

FEATURES

• Single supply with operation down to 1.8V
- Maximum write current 3 mA at 6.0V
- Standby current 1

m

A max at 1.8V
• 2-wire serial interface bus, I

2

C



compatible
• 100 kHz (1.8V) and 400 kHz (5V) compatibility
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Hardware write protect
• 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
• Up to eight devices may be connected to the
same bus for up to 256K bits total memory
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Temperature ranges

DESCRIPTION

The Microchip Technology Inc. 24AA32A is a 4K x 8
(32K bit) Serial Electrically Erasable PROM capable of
operation across a broad voltage range (1.8V to 6.0V).
It has been developed for advanced, low power applica-
tions such as personal communications or data acqui-
sition. The 24AA32A also has a page-write capability of
up to 32 bytes of data. The 24AA32A is capable of both
random and sequential reads up to the 32K boundary.
Functional address lines allow up to eight 24AA32A
devices on the same bus, for up to 256K bits address
space. Advanced CMOS technology and broad voltage
range make this device ideal for low-power/low-voltage,
nonvolatile code and data applications. The 24AA32A
is available in the standard 8-pin plastic DIP and both
150 mil and 200 mil SOIC packages.
- Commercial (C): 0



C to +70



C

PACKAGE TYPE
BLOCK DIAGRAM
24AA32A
24AA32A
1
2
3
4
8
7
6
5
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
A0
A1
A2
Vss
1
2
3
4
8
7
6
5
Vcc
WP
SCL
SDA
PDIP
SOIC
HV GENERATOR
EEPROM
ARRAY
PAGE LATCHES
YDEC
XDEC
SENSE AMP
R/W CONTROL
MEMORY
CONTROL
LOGIC
I/O
CONTROL
LOGIC
WPA0..A2
SDA
SCL
VCC
VSS
WP
I/O

24AA32A

32K 1.8V I

2

C



Serial EEPROM

I

2

C is a trademark of Philips Corporation.

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