1. Features
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Low-voltage and Standard-voltage Operation
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– 1.8 (V
CC
= 1.8V to 5.5V)
Internally Organized as 16,384 x 8
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5.5V, 2.5V), and 400 kHz (1.8V) Compatibility
Write Protect Pin for Hardware and Software Data Protection
64-byte Page Write Mode (Partial Page Writes Allowed)
Self-timed Write Cycle (5 ms Max)
High Reliability
– Endurance: One Million Write Cycles
– Data Retention: 40 Years
Lead-free/Halogen-free
8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini MAP, 8-lead Ultra Lead
Frame Land Grid Array (ULA), 8-lead TSSOP, and 8-ball dBGA2 Packages
Die Sales: Wafer Form, Tape and Reel and Bumped Wafers
Two-wire Serial
EEPROM
128K (16,384 x 8)
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AT24C128B
2. Description
The AT24C128B provides 131,072 bits of serial electrically erasable and programma-
ble read-only memory (EEPROM) organized as 16,384 words of 8 bits each. The
device’s cascadable feature allows up to eight devices to share a common two-wire
bus. The device is optimized for use in many industrial and commercial applications
where low-power and low-voltage operation are essential. The devices are available
in space-saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead Ultra Thin Mini
MAP, 8-lead Ultra Lead Frame Land Grid Array (ULA), 8-lead TSSOP, and 8-ball
dBGA2 packages. In addition, the entire family is available in a 1.8V (5.5V to 3.6V)
version.
8-lead PDIP
8-lead SOIC
VCC
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Table 0-1.
Pin Name
Pin Configurations
Function
A0
A1
A2
GND
1
2
3
4
8
7
6
5
A0–A2
SDA
SCL
WP
GND
Address Inputs
Serial Data
Serial Clock Input
Write Protect
Ground
VCC
WP
SCL
SDA
VCC
WP
SCL
SDA
8-lead dBGA2
8
7
6
5
1
2
3
4
A0
A1
A2
GND
A0
A1
A2
GND
8-lead TSSOP
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
Bottom View
8-lead Ultra Lead Frame Land Grid Array
8
7
6
5
1
2
3
4
A0
A1
A2
GND
8-lead Ultra Thin Mini MAP
VCC
WP
SCL
SDA
8
7
6
5
1
2
3
4
A0
A1
A2
GND
Bottom View
Bottom View
Rev. 5296A–SEEPR–1/08
ATMEL [ ATMEL CORPORATION ]
