(Features
• Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 1.8 to 5.5V)
• Internally Organized 4096 x 8, 8192 x 8
• 2-Wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bi-directional Data Transfer Protocol
• 1 MHz (5.0V) and 400 KHz (1.8V 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
• Lead-free/Halogen-free Devices
• 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Lead Frame Land Grid Array (ULA), 8-lead
TSSOP, 8-lead Ultra Thin Mini-MAP (MLP2x3), and 8-ball dBGA2 Packages.
• Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
Description
The AT24C32C/64C 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 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 AT24C32C/64C is
available in space saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Lead Frame
Land Grid Array (ULA), 8-lead TSSOP, 8-lead Ultra Thin Mini-MAP (MLP2x3) and, 8-
ball dBGA2 packages and is accessed via a 2-wire serial interface. In addition, the
entire family is available in 1.8V (1.8 to 5.5V) version.
Pin Configurations
8-lead Ultra Thin
8-lead Ultra Lead Frame
Mini-MAP (MLP 2x3) Land Grid Array (ULA)
Pin Name
A0 - A2
SDA
Function
Address Inputs
Serial Data
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
SCL
Serial Clock Input
Bottom View
Bottom View
WP Write Protect
8-ball dBGA2
8-lead TSSOP
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
Bottom View
8-lead SOIC
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 A0 1
7 WP
A1 2
6 SCL A2 3
5 SDA GND 4
8 VCC
7 WP
6 SCL
5 SDA
2-Wire
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32C
AT24C64C
Not Recommended
for New Design
5298A–SEEPR–1/08
