24AA65
2
64K 1.8V I C Smart Serial EEPROM
FEATURES
PACKAGE TYPES
PDIP
• Voltage operating range: 1.8V 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 I2C
compatible
A0
A1
1
2
8
7
VCC
NC
A2
3
4
6
5
SCL
SDA
• 8 byte page, or byte modes available
• 2 ms typical write cycle time, byte or page
• 64-byte line input cache for fast write loads
• Up to 8 devices may be connected to the same
bus for up to 512K bits total memory
• 100 kHz (1.8V) and 400 kHz (5.0V) compatibility
• Programmable block security options
• Programmable endurance options
• Schmitt trigger, filtered inputs for noise suppres-
sion
VSS
SOIC
1
2
8
A0
VCC
NC
7
6
5
A1
A2
3
4
• Output slope control to eliminate ground bounce
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Endurance:
SCL
SDA
VSS
- 10,000,000 E/W cycles guaranteed for a High
Endurance Block
- 1,000,000 E/W cycles guaranteed for a Stan-
dard Endurance Block
• Electrostatic discharge protection > 4000V
• Data retention > 200 years
BLOCK DIAGRAM
HV Generator
A0..A2
• 8-pin PDIP/SOIC packages
I/O
Control
Logic
Memory
Control
Logic
EEPROM ARRAY
•
Temperature ranges
- Commercial (C):
XDEC
Page Latches
0°C to +70°C
Buffer
DESCRIPTION
I/O
SCL
The Microchip Technology Inc. 24AA65 is a “smart” 8K x
8 Serial Electrically Erasable PROM. This device has
been developed for advanced, low power applications
such as personal communications, and provides the
systems designer with flexibility through the use of many
new user-programmable features. It is capable of opera-
tion down to 1.8V, the end-of-life voltage for 2 “AA” bat-
tery cells for most popular battery technologies.The
24AA65 offers a relocatable 4K bit block of ultra-high-
endurance memory for data that changes frequently. The
remainder of the array, or 60K bits, is rated at 1,000,000
ERASE/WRITE (E/W) cycles guaranteed. The 24AA65
features an input cache for fast write loads with a capac-
ity of eight pages, or 64 bytes. This device also features
programmable security options for E/W protection of crit-
ical data and/or code of up to fifteen 4K blocks. Func-
tional address lines allow the connection of up to eight
YDEC
SDA
Vcc
Vss
Sense AMP
R/W Control
24LC65's on the same bus for up to 512K bits contigu-
ous EEPROM memory. Advanced CMOS technology
makes this device ideal for low-power non-volatile code
and data applications. The 24AA65 is available in the
standard 8-pin plastic DIP and 8-pin surface mount
SOIC package.
I2C is a trademark of Philips Corporation.
Smart Serial is a trademark of Microchip Technology Inc.
1996 Microchip Technology Inc.
DS21056F-page 1
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