M
24AA64/24LC64
64K I C CMOS Serial EEPROM
2 ™
DEVICE SELECTION TABLE
PACKAGE TYPE
PDIP
Part
Number
Vcc
Range
Max Clock
Frequency
Temp
Ranges
A0
1
8
Vcc
†
24AA64
24LC64
1.8-5.5V
2.5-5.5V
400 kHz
I
A1
A2
2
3
7
6
WP
‡
400 kHz
I, E
SCL
†
‡
100 kHz for Vcc < 2.5V.
100 kHz for E temperature range.
Vss
4
5
SDA
FEATURES
• Low power CMOS technology
- Maximum write current 3 mA at 5.5V
- Maximum read current 400 µA at 5.5V
- Standby current 100 nA typical at 5.5V
• 2-wire serial interface bus, I2C compatible
• Cascadable for up to eight devices
• Self-timed ERASE/WRITE cycle
SOIC
8
1
A0
A1
VCC
WP
7
6
5
2
3
4
SCL
SDA
A2
VSS
• 32-byte page or byte write modes available
• 5 ms max write cycle time
• Hardware write protect for entire array
• Output slope control to eliminate ground bounce
• Schmitt trigger inputs for noise suppression
• 1,000,000 erase/write cycles guaranteed
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
TSSOP
1
8
WP
SCL
2
3
4
7
6
5
Vcc
A0
SDA
Vss
A2
A1
• 8-pin PDIP, SOIC (150 and 208 mil) and TSSOP
packages; 14-pin SOIC package
• Temperature ranges:
BLOCK DIAGRAM
- Industrial (I):
- Automotive (E)
-40°C to +85°C
-40°C to +125°C
WP
A0…A2
HV GENERATOR
DESCRIPTION
I/O
CONTROL
LOGIC
MEMORY
CONTROL
LOGIC
EEPROM
ARRAY
XDEC
The Microchip Technology Inc. 24AA64/24LC64
(24xx64*) is a 8K x 8 (64K bit) Serial Electrically Eras-
able PROM capable of operation across a broad volt-
age range (1.8V to 5.5V). It has been developed for
advanced, low power applications such as personal
communications or data acquisition. This device also
has a page-write capability of up to 32 bytes of data.
This device is capable of both random and sequential
reads up to the 64K boundary. Functional address lines
allow up to eight devices on the same bus, for up to 512
Kbits address space. This device is available in the
standard 8-pin plastic DIP, 8-pin SOIC (150 and
208 mil), and 8-pin TSSOP.
PAGE LATCHES
I/O
SCL
YDEC
SDA
VCC
VSS
SENSE AMP
R/W CONTROL
I2C is a trademark of Philips Corporation.
*24xx64 is used in this document as a generic part number for the 24AA64/24LC64 devices.
1998 Microchip Technology Inc.
DS21189B-page 1