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AT24C32A_07 Datasheet, PDF (1/22 Pages) ATMEL Corporation – Two-wire Serial EEPROM 32K (4096 x 8) 64K (8192 x 8)
Features
• Low-Voltage and Standard-Voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
• Low-Power Devices (ISB = 6 µA @ 5.5V) Available
• Internally Organized 4096 x 8, 8192 x 8
• Two-wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 400 kHz (1.8V, 2.5V, 2.7V, 5V) Compatibility
• Write Protect Pin for Hardware Data Protection
• 32-byte Page Write Mode (Partial Page Writes Allowed)
• Self-timed Write Cycle (5 ms Max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• Automotive Devices Available
• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead Mini-MAP (MLP 2x3)
and 8-lead TSSOP Packages
• Lead-free/Halogen-free
• Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The AT24C32A/64A provides 32,768/65,536 bits of serial electrically erasable and
programmable 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 two-
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 AT24C32A/64A is
available in space saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ
SOIC, 8-lead Mini-MAP (MLP 2x3) and 8-lead TSSOP packages and is accessed via
a 2-wire serial interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V)
and 1.8V (1.8V to 5.5V) versions.
Two-wire
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32A(1)
AT24C64A(2)
Notes: 1. Not recommended for
new design; please
refer to AT24C32C.
2. Not recommended for
new design; please
refer to AT24C64C.
Table 1. Pin Configuration
Pin Name Function
A0 – A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
8-lead SOIC
8-lead Mini-MAP (MLP 2x3)
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
Bottom View
8-lead TSSOP
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
8-lead PDIP
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
3054T–SEEPR–1/07
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