Obsolete Device
Please use 24LC32A or 24LC65.
24LC32
32K 2.5V I
2
C
™
Smart Serial EEPROM
FEATURES
• Voltage operating range: 2.5V to 6.0V
- Peak write current 3 mA at 6.0V
- Maximum read current 150
µA
at 6.0V
- Standby current 1
µA
typical
• Industry standard two-wire bus protocol, I
2
C
compatible
- Including 100 kHz (2.5V) and 400 kHz (5V) modes
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Endurance:
- 10,000,000 Erase/Write cycles
guaranteed for High Endurance Block
- 1,000,000 E/W cycles guaranteed for
Standard Endurance Block
• 8 byte page, or byte modes available
• 1 page x 8 line input cache (64 bytes) for fast write
loads
• Schmitt trigger, filtered inputs for noise suppression
• Output slope control to eliminate ground bounce
• 2 ms typical write cycle time, byte or page
• Factory programming (QTP) available
• Up to 8 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/SOIC packages
• Temperature ranges
- Commercial (C):
0°C to +70°C
- Industrial (I):
-40° to +85°
PACKAGE TYPES
PDIP
A0
A1
A2
V
SS
1
2
3
4
24LC32
8
7
6
5
V
CC
NC
SCL
SDA
SOIC
1
2
3
4
24LC32
A0
A1
A2
V
SS
8
7
6
5
V
CC
NC
SCL
SDA
BLOCK DIAGRAM
A0 A1 A2
HV GENERATOR
DESCRIPTION
The Microchip Technology Inc. 24LC32 is a 4K x 8
(32K bit) Serial Electrically Erasable PROM capable of
operation across a broad voltage range (2.5V to 6.0V).
This device has been developed for advanced, low
power applications such as personal communications
or data acquisition. The 24LC32 features an input
cache for fast write loads with a capacity of eight 8-byte
pages, or 64 bytes. It also features a fixed 4K-bit block
of ultra-high endurance memory for data that changes
frequently. The 24LC32 is capable of both random and
sequential reads up to the 32K boundary. Functional
address lines allow up to eight 24LC32 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, non-
volatile code and data applications. The 24LC32 is
available the standard 8-pin in plastic DIP and 8-pin
surface mount SOIC package.
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
XDEC
EEPROM
ARRAY
PAGE LATCHES
I/O
SCL
CACHE
SDA
V
CC
V
SS
YDEC
SENSE AMP
R/W CONTROL
I
2
C is a trademark of Philips Corporation. Smart Serial is a trademark of Microchip Technology Inc.
2004 Microchip Technology Inc.
DS21072G-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
