24AA32A/24LC32A
32K I2C™ Serial EEPROM
Device Selection Table
Description
The Microchip Technology Inc. 24AA32A/24LC32A
Part
VCC
Max Clock
Temp
(24XX32A*) is a 32 Kbit Electrically Erasable PROM.
The device is organized as four blocks of 8K x 8-bit
memory with a 2-wire serial interface. Low-voltage
design permits operation down to 1.8V, with standby
and active currents of only 1 µA and 1 mA,
respectively. It has been developed for advanced, low-
power applications such as personal communications
or data acquisition. The 24XX32A also has a page write
capability for up to 32 bytes of data. Functional address
lines allow up to eight devices on the same bus, for up
to 256 Kbits address space. The 24XX32A is available
in the standard 8-pin PDIP, surface mount SOIC,
TSSOP and MSOP packages.
Number
Range
Frequency
Ranges
24AA32A
24LC32A
1.8-5.5
2.5-5.5
400 kHz(1)
400 kHz
I
I, E
Note 1: 100 kHz for VCC <2.5V
Features
• Single supply with operation down to 1.8V
• Low-power CMOS technology
- 1 mA active current typical
- 1 µA standby current (max.) (I-temp)
• Organized as 4 blocks of 8K bits (32K bit)
• 2-wire serial interface bus, I2C™ compatible
• Cascadable for up to eight devices
Package Types
ROTATED TSSOP
(24AA32AX/24LC32AX)
PDIP/SOIC/TSSOP/MSOP
• Schmitt Trigger inputs for noise suppression
• Output slope control to eliminate ground bounce
A0 1
A1 2
A2 3
Vss 4
8 Vcc
7 WP
6 SCL
5 SDA
8
7
6
5
1
2
3
4
WP
Vcc
A0
SCL
SDA
Vss
A2
• 100 kHz (<2.5V) and 400 kHz (≥2.5V)
compatibility
A1
• Self-timed write cycle (including auto-erase)
• Page write buffer for up to 32 bytes
• 2 ms typical write cycle time for page write
• Hardware write-protect for entire memory
• Can be operated as a serial ROM
• Factory programming (QTP) available
• ESD protection > 4,000V
Block Diagram
A0
WP
A1 A2
HV Generator
• 1,000,000 erase/write cycles
I/O
Control
Logic
Memory
Control
Logic
• Data retention > 200 years
EEPROM
XDEC
Array
• 8-lead PDIP, SOIC, TSSOP and MSOP packages
• Standard and Pb-free finishes available
• Available temperature ranges:
Page Latches
I/O
- Industrial (I): -40°C to +85°C
SCL
YDEC
- Automotive (E): -40°C to +125°C
SDA
Vcc
Sense Amp.
R/W Control
VSS
*24XX32A is used in this document as a generic part number for the 24AA32A/24LC32A devices.
2003 Microchip Technology Inc.
DS21713D-page 1