IS24C02A IS24C04A
IS24C08A IS24C16A
2K-bit/4K-bit/8K-bit/16K-bit
2-WIRE SERIAL CMOS EEPROM
fEATURES
• Two-Wire Serial Interface, I
2
C
TM
Compatible
– Bi-directional data transfer protocol
• Wide Voltage Operation
– Vcc = 1.8V to 5.5V
• 400 KHz (2.5V) and 1 MHz (5.0V) Compatible
• Low Power
– Standby Current less than 1 µA (1.8V)
– Read Current less than 2 mA (5.0V)
– Write Current less than 3 mA (5.0V)
• Hardware Data Protection
– Write Protect Pin
• Sequential Read Feature
• Filtered Inputs for Noise Suppression
• Self time write cycle with auto clear
5 ms max @ 2.5V
• Memory Organization
–IS24C02A: 256x8 (one block of 256 bytes)
–IS24C04A: 512x8 (two blocks of 256 bytes)
–IS24C08A: 1024x8 (four blocks of 256 bytes)
–IS24C16A: 2048x8 (eight blocks of 256 bytes)
• 16 Byte Page Write Buffer
• High Reliability
–Endurance: 1,000,000 Cycles
–Data Retention: 100 Years
• Industrial temperature grade
• Packages: SOIC/SOP, TSSOP, PDIP, MSOP,
DFN, CSP
DESCRIPTIOn
The IS24C02A, IS24C04A, IS24C08A, and
IS24C16A are EEPROM devices that use the
industrial standard 2-wire interface for communica-
tions. The IS24C02A, IS24C04A, IS24C08A, and
IS24C16A contain a memory array of 2K-bits (256
x 8), 4K-bits (512 x 8), 8K-bits (1,024 x 8), and
16K-bits (2,048 x 8), respectively. Each device is
organized into 16 byte pages for page write mode.
This EEPROM operates in a wide voltage range of
1.8V to 5.5V to be compatible with most application
voltages. ISSI designed this device family to be a
practical, low-power 2-wire EEPROM solution. The
devices are offered in Lead-free, RoHS, halogen
free or Green. The available package types are
8-pin SOIC/SOP, TSSOP, PDIP, MSOP, DFN and
CSP.
The IS24C02A/04A/08A/16A maintains compat-
ibility with the popular 2-wire bus protocol, so it is
easy to use in applications implementing this bus
type. The simple bus consists of the Serial Clock
wire (SCL) and the Serial Data wire (SDA). Using
the bus, a Master device such as a microcontroller
is usually connected to one or more Slave devices
such as this device. The bit stream over the SDA
line includes a series of bytes, which identifies a
particular Slave device, an instruction, an address
within that Slave device, and a series of data, if ap-
propriate. The IS24C02A/04A/08A/16A has a
Write Protect pin (WP) to allow blocking of any
write instruction transmitted over the bus.
Copyright © 2008 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without
notice. ISSI products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for critical medical or surgical equip-
ment, aerospace systems, or for other applications planned to support or sustain life. It is the customer's obligation to optimize the design in their own products for the best
performance and optimization on the functionality and etc. ISSI assumes no liability arising out of the application or use of any information, products or services described
herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and prior placing orders for products.
Integrated Silicon Solution, Inc. — www.issi.com
Rev. L
08/06/09
3
IS24C02A IS24C04A
PIN CONFIGURATION
IS24C08A
IS24C16A
PIN CONFIGURATION
8-pad Dfn
8-Pin SOIC, TSSOP, MSOP, PDIP
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
A0 1
A1 2
A2 3
GND 4
(Top View)
8 VCC
7 WP
6 SCL
5 SDA
PIn DESCRIPTIOnS
A0-A2
SDA
SCL
WP
Vcc
GND
Address Inputs
Serial Address/Data I/O
Serial Clock Input
Write Protect Input
Power Supply
Ground
The IS24C04A 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 a no connect in the IS24C04A. When
the A1 or A2 input is left floating, the input internally defaults
to zero.
The IS24C08A only uses the 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 no connects in the
IS24C08A. When the A2 input is left floating, the input internally
defaults to zero.
These pins are not used by IS24C16A . The A0, A1, and A2
pins are no connects in the IS24C16A.
WP
WP is the Write Protect pin. If the WP pin is tied to V
cc
on
the IS24C02A, IS24C04A, IS24C08A and IS24C016A,
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.
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.
A0, A1, A2
The A0, A1 and A2 are the device address inputs.The IS24C02A
uses the A0, A1, and A2 for hardware addressing and a total
of 8 devices may be used on a single bus system. When
the A0, A1, or A2 inputs are left floating, the input internally
defaults to zero.
Integrated Silicon Solution, Inc. — www.issi.com
Rev. L
08/06/09
5
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