Features
• Low-voltage and Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
• Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K),
1024 x 8 (8K) or 2048 x 8 (16K)
• Two-wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 100 kHz (1.8V) and 400 kHz (2.5V, 2.7V, 5V) Compatibility
• Write Protect Pin for Hardware Data Protection
• 8-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes
• Partial Page Writes Allowed
Two-wire
Serial EEPROM
1K (128 x 8)
• Self-timed Write Cycle (5 ms max)
• High-reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• Automotive Grade, Extended Temperature and Lead-free/Halogen-free Devices
Available
2K (256 x 8)
• 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 5-lead SOT23,
8-lead TSSOP and 8-ball dBGA2 Packages
• Die Sales: Wafer Form, Waffle Pack and Bumped Wafers
4K (512 x 8)
8K (1024 x 8)
16K (2048 x 8)
Description
The AT24C01A/02/04/08/16 provides 1024/2048/4096/8192/16384 bits of serial elec-
trically erasable and programmable read-only memory (EEPROM) organized as
128/256/512/1024/2048 words of 8 bits each. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage operation
are essential. The AT24C01A/02/04/08/16 is available in space-saving 8-lead PDIP,
8-lead JEDEC SOIC, 8-lead MAP, 5-lead SOT23 (AT24C01A/AT24C02/AT24C04), 8-
lead TSSOP, and 8-ball dBGA2 packages and is accessed via a Two-wire serial inter-
face. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to
5.5V) versions.
AT24C01A
AT24C02
AT24C04
AT24C08(1)
AT24C16(2)
8-lead TSSOP
8-lead SOIC
Table 1. Pin Configuration
A0
A1
1
2
3
4
8
7
6
5
VCC
WP
A0
A1
1
2
3
4
8
7
6
5
VCC
WP
Pin Name
A0 - A2
SDA
Function
A2
SCL
SDA
A2
SCL
SDA
Address Inputs
Serial Data
GND
GND
Note: 1. This device is not recom-
mended for new designs.
SCL
Serial Clock Input
Write Protect
No Connect
Ground
Please refer to AT24C08A.
8-ball dBGA2
8-lead MAP
2. This device is not recom-
mended for new designs.
Please refer to AT24C16A.
WP
8
7
6
5
1
2
3
4
A0
A1
A2
VCC
VCC 8
1 A0
2 A1
3 A2
4 GND
WP
SCL
SDA
WP 7
SCL 6
SDA 5
NC
GND
VCC
GND
Power Supply
Bottom View
8-lead PDIP
Bottom View
5-lead SOT23
A0
A1
1
2
3
4
8
7
6
5
VCC
WP
WP
SCL
GND
SDA
1
2
3
5
4
A2
SCL
SDA
VCC
GND
0180U–SEEPR–05/05
1