1996 Microchip Technology Inc. DS21073E-page 1

FEATURES

• Voltage operating range: 2.5V to 6.0V
- Peak write current 3 mA at 6.0V
- Maximum read current 150

m

A at 6.0V
- Standby current 1

m

A typical
• Industry standard two wire bus protocol I

2

C




compatible
• 8 byte page, or byte modes available
• 2 ms typical write cycle time, byte or page
• 64-byte input cache for fast write loads
• Up to 8 devices may be connected to the same
bus for up to 512K bits total memory
• Including 100 kHz (2.5V) and 400 kHz (5.0V)
compatibility
• Programmable block security options
• Programmable endurance options
• Schmitt trigger, filtered inputs for noise suppres-
sion
• Output slope control to eliminate ground bounce
• Self-timed ERASE and WRITE cycles
• Power on/off data protection circuitry
• Endurance:
- 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
• 8-pin PDIP/SOIC packages
• Temperature ranges

DESCRIPTION

The Microchip Technology Inc. 24LC65 is a “smart” 8K
x 8 Serial Electrically Erasable PROM. This device
has been developed for advanced, low power applica-
tions such as personal communications, and provides
the systems designer with flexibility through the use of
many new user-programmable features. The 24LC65
offers a relocatable 4K bit block of ultra-high-endurance
memory for data that changes frequently. The remain-
der of the array, or 60K bits, is rated at 1,000,000
ERASE/WRITE (E/W) cycles guaranteed. The 24LC65
features an input cache for fast write loads with a
capacity of eight pages, or 64 bytes. This device also
features programmable security options for E/W protec-
tion of critical data and/or code of up to fifteen 4K
- Commercial (C): 0



C to +70



C
- Industrial (I) -40



C to +85



C
blocks. Functional address lines allow the connection of
up to eight 24LC65's on the same bus for up to 512K
bits contiguous EEPROM memory. Advanced CMOS
technology makes this device ideal for low-power non-
volatile code and data applications. The 24LC65 is
available in the standard 8-pin plastic DIP and 8-pin
surface mount SOIC package.
24LC65

64K 2.5V I

2

C



Smart Serial



EEPROM

PACKAGE TYPES
BLOCK DIAGRAM
24LC65
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
VCC
NC
SCL
SDA
24LC65
A0
A1
A2
VSS
1
2
3
4
8
7
6
5
VCC
NC
SCL
SDA
PDIP
SOIC
HV Generator
EEPROM ARRAY
Page Latches
Cache
YDEC
Vcc
Vss
I/O
Control
Logic
Memory
Control
Logic
SCL
SDA
A0..A2

XDEC
Sense AMP
R/W Control
I/O

I

2

C is a trademark of Philips Corporation.
Smart Serial is a trademark of Microchip Technology Inc.

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