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Atmel Electronic Components Datasheet

AT24C128B Datasheet

Two-wire Serial EEPROM

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AT24C128B pdf
1. Features
Low-voltage and Standard-voltage Operation
– 1.8 (VCC = 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)
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
Table 0-1. Pin Configurations
Pin Name
Function
A0
A1
A2
GND
1
2
3
4
8 VCC
A0
7 WP
A1
6 SCL
A2
5 SDA GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
A0–A2
SDA
SCL
WP
GND
Address Inputs
Serial Data
Serial Clock Input
Write Protect
Ground
8-lead dBGA2
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
8-lead TSSOP
A0
A1
A2
GND
1
2
3
4
8 VCC
7 WP
6 SCL
5 SDA
Bottom View
8-lead Ultra Lead Frame Land Grid Array
VCC 8
1 A0
WP 7
2 A1
SCL 6
3 A2
SDA 5
4 GND
8-lead Ultra Thin Mini MAP
VCC 8
WP 7
SCL 6
SDA 5
1 A0
2 A1
3 A2
4 GND
Bottom View
Bottom View
Not Recommended
for New Design
Rev. 5296A–SEEPR–1/08


Atmel Electronic Components Datasheet

AT24C128B Datasheet

Two-wire Serial EEPROM

No Preview Available !

AT24C128B pdf
3. Absolute Maximum Ratings*
Operating Temperature  55C to +125C
Storage Temperature 65C to +150C
Voltage on Any Pin
with Respect to Ground  1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only;
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.
Figure 3-1. Block Diagram
VCC
GND
WP
SCL
SDA
START
STOP
LOGIC
LOAD
SERIAL
CONTROL
EN
H.V. PUMP/TIMING
LOGIC
DEVICE
COMP
DATA RECOVERY
ADDRESS
COMPARATOR
LOAD INC
A2
A1
R/W DATA WORD
EEPROM
A0 ADDR/COUNTER
DIN
DOUT
Y DEC
SERIAL MUX
DOUT/ACK
LOGIC
2 AT24C128B
5296A–SEEPR–1/08


Part Number AT24C128B
Description Two-wire Serial EEPROM
Maker ATMEL Corporation
Total Page 23 Pages
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