AM24LC21B Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – Dual Mode, 1K-bits (128 x 8) 2-Wire Serial EEPROM

Dual Mode, 1K-bits (128 x 8) 2-Wire Serial EEPROM
AM24LC21B
(Preliminary)
Features
- Single supply with operation down to 2.5V
- Completely implements DDC1/DDC2 interface for
monitor identification, including recovery to DDC1
- Low power CMOS technology
- 1 mA typical active current
- 10 uA standby current typical at 5.5V
- 2-wire serial interface bus, I²C compatible
- 100Khz (2.5V) and 400Khz (5V) compatibility
- Self-timed write cycle (including auto-erase)
- Hardware write-protect pin
- Page-write buffer for up to eight bytes
- 1,000,000 erase/write cycles
- Data retention > 40 years
- 8-pin PDIP and SOP packages
- Available for extended temperature ranges
Commercial (C): 0°C to +70°C
Industrial (I): -40°C to +85°C
Pin Assignments
(Top View)
(Top View)
NC
NC
NC
VSS
1
8
2
7
3
6
4
5
PDIP Package
VCC
VCLK
SCL
SDA
NC
NC
NC
VSS
1
8
2
7
3
6
4
5
SOP Package
VCC
VCLK
SCL
SDA
Ordering Information
General Description
The AM24LC21B is a 128 x 8-bit dual-mode
Electrically Erasable PROM. This device is
designed for use in applications requiring storage
and serial transmission of configuration and control
information. Two modes of operation have been
implemented: transmit only mode and bi-directional
mode. Upon power-up, the device will be in the
transmit only mode, sending a serial bit stream of
the memory array contents, clocked by the VCLK
pin. A valid high to low transition on the SCL pin will
cause the device to enter the bi-directional mode,
with byte selectable read/write capability of the
memory array. The AM24LC21B is available in a
standard 8-pin PDIP and SOP package in both
commercial and industrial temperature ranges.
The difference between AM24LC21 and
AM24LC21B is the former has Write protection
function and the latter doesn’t have write protection
function.
Pin Descriptions
Name
Description
NC
No connection
VSS
Ground
SDA
Serial address/data I/O
VCLK Serial clock (transmit only mode)
VCC
Power supply
SCL
Serial clock (bi-directional mode)
Note. See pin descriptions (continued) at page 11/13 for more
detailed
AM24LC 21B X X X
Operating Voltage
LC : 2.5V~5.5V,CMOS
Type
1K Dual Mode
Temp. grade
Blank : 0^o C ~ +70^o C
I : ^{−40o C ~ +85o C}
Package
S : SOP-8L
N : PDIP-8L
Packing
Blank : Tube
A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.1 Jul 2, 2003
1/13