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Atmel Electronic Components Datasheet



AT24C32A

Two-wire Serial EEPROM



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AT24C32A pdf
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
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
VCC
WP
SCL
SDA
8
7
6
5
1 A0
2 A1
3 A2
4 GND
Bottom View
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
8-lead PDIP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
3054T–SEEPR–1/07
1



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AT24C32A pdf
Absolute Maximum Ratings*
Operating Temperature..................................–55°C to +125°C
Storage Temperature .....................................–65°C to +150°C
Voltage on Any Pin
with Respect to Ground .................................... –1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
Figure 1. Block Diagram
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
2 AT24C32A/64A
3054T–SEEPR–1/07



Part Number AT24C32A
Description Two-wire Serial EEPROM
Maker ATMEL - ATMEL
Total Page 22 Pages
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