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IS24C128A-2PI Datasheet(PDF) 3 Page - Integrated Silicon Solution, Inc

Part # IS24C128A-2PI
Description  128K-bit/ 256K-bit 2-WIRE SERIAL CMOS EEPROM
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Manufacturer  ISSI [Integrated Silicon Solution, Inc]
Direct Link  http://www.issi.com
Logo ISSI - Integrated Silicon Solution, Inc

IS24C128A-2PI Datasheet(HTML) 3 Page - Integrated Silicon Solution, Inc

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Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
3
ADVANCEDINFORMATION
Rev. 00B
06/27/06
ISSI®
IS24C128A
IS24C256A
PIN CONFIGURATION
8-Pin DIP and SOIC
SCL
This input clock pin is used to synchronize the data transfer
to and from the device.
SDA
The SDA is a Bi-directional pin used to transfer addresses
and data into and out of the device. The SDA pin is an open
drain output and can be wire Or'ed with other open drain or
open collector outputs. The SDA bus
requires a pullup
resistor to Vcc.
1
2
3
4
8
7
6
5
A0
A1
A2
GND
VCC
WP
SCL
SDA
PIN DESCRIPTIONS
A0-A2
Address Inputs
SDA
Serial Address/Data I/O
SCL
Serial Clock Input
WP
Write Protect Input
Vcc
Power Supply
NC
No Connect
GND
Ground
A0, A1, A2
The A0, A1, and A2 are the device address inputs that are
hardwired or left not connected for hardware compatibility
with the IS24C32A/64A. When pins are hardwired, as many
as eight 256K devices may be addressed on a single bus
system. When the pins are not hardwired, the default values
of A0, A1, and A2 are zero.
WP
WP is the Write Protect pin. If the WP pin is tied to Vcc
the entire array becomes Write Protected (Read only).
When WP is tied to GND or left floating, normal read/write
operations are allowed to the device.


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