IS24C01-2PI datasheet(3/13 Pages) ISSI

3 / 13 page

Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774

Rev. D

06/25/02

IS24C01

IS24C02

IS24C04

IS24C08

IS24C16

ISSI®

PIN DESCRIPTIONS

A0-A2

Address Inputs

SDA

Serial Address/Data I/O

SCL

Serial Clock Input

Write Protect Input

Vcc

Power Supply

GND

Ground

SCL

This input clock pin is used to synchronize the data

transfer to and from the device.

SDA

TheSDAisaBi-directionalpinusedtotransferaddressesanddata

intoandoutofthedevice. TheSDApinisanopendrainoutputand

can be wire-Ored with other open drain or open collector outputs.

The SDA bus requires a pullup resistor to Vcc.

A0, A1, A2

TheA0,A1andA2arethedeviceaddressinputs.TheIS24C01and

IS24C02 use the A0, A1, and A2 for hardware addressing and a

total of 8 devices may be used on a single bus system.

PIN CONFIGURATION

8-Pin DIP and SOIC

8 Pin TSSOP (1K, 2K, 4K and 8K)

8-Pin MSOP (1K, 2K)

GND

VCC

SCL

SDA

The IS24C04 uses A1 and A2 pins for hardwire addressing and

a total of four devices may be addressed on a single bus system.

The A0 pin is not used by IS24C04. This pin can be left floating

or tied to GND or Vcc.

The IS24C08 only use A2 input for hardwire addressing and a

total of two devices may be addressed on a single bus system.

The A0 and A1 pins are not used by IS24C08. They may be left

floating or tied to either GND or Vcc.

These pins are not used by IS24C16. A0 and A1 may be left

floating or tied to either GND or Vcc. A2 should be tied to either

GND or Vcc.

WP is the Write Protect pin. On the 24C01, 24C02, IS24C04

and 24C08, if the WP pin is tied to VCC the entire array

becomes Write Protected (Read only). On the 24C16, if the

WP pin is tied to Vcc the upper half 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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