eeprom的wp 引脚_EEPROM 24c32数据手册
1
Features
•
Low-Voltage and Standard-Voltage Operation
–
5.0 (V
CC
= 4.5V to 5.5V)
–
2.7 (V
CC
= 2.7V to 5.5V)
–
2.5 (V
CC
= 2.5V to 5.5V)
–
1.8 (V
CC
= 1.8V to 5.5V)
•
Low-Power Devices (I
SB
= 2
=
µA @ 5.5V) Available
•
Internally Organized 4096 x 8, 8192 x 8
•
2-Wire Serial Interface
•
Schmitt Trigger, Filtered Inputs for Noise Suppression
•
Bidirectional Data Transfer Protocol
•
100 kHz (1.8V
, 2.5V
, 2.7V) and 400 kHz (5V) Clock Rate
•
Write Protect Pin for Hardware Data Protection
•
32-Byte Page Write Mode (Partial Page Writes Allowed)
•
Self-Timed Write Cycle (10 ms max)
•
High Reliability
–
Endurance: 1 Million Write Cycles
–
Data Retention: 100 Years
–
ESD Protection: >3,000V
•
Automotive Grade and Extended Temperature Devices Available
•
8-Pin JEDEC PDIP
, 8-Pin JEDEC SOIC, 8-Pin EIAJ SOIC,
and 8-pin TSSOP Packages
Description
The AT24C32/64 provides 32,768/65,536 bits of serial electrically erasable and pro-
grammable read only memory (EEPROM) organized as 4096/8192 words of 8 bits
each. The device’s cascadable feature allows up to 8 devices to share a common 2-
wire bus. The device is optimized for use in many industrial and commercial applica-
tions where low power and low voltage operation are essential. The AT24C32/64 is
available in space saving 8-pin JEDEC PDIP, 8-pin JEDEC SOIC, 8-pin EIAJ SOIC,
and 8-pin TSSOP (AT24C64) packages and is accessed via a 2-wire serial interface.
In addition, the entire family is available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to 5.5V),
2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) versions.
2-Wire
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32
AT24C64
Rev. 0336G–04/01
2-Wire, 32K
Serial E
2
PROM
Pin Configurations
Pin Name
Function
A0 - A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
8-Pin PDIP
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
8-Pin SOIC
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
8-Pin TSSOP
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
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