IS24C02E
TAbLE Of COnTEnTS
1 fEATURES .........................................................................................................3
2 DESCRIPTIOn ....................................................................................................4
3 PIn COnfIGURATIOn .......................................................................................5
4 PIn DESCRIPTIOnS ..........................................................................................6
5 bLOCK DIAGRAM .............................................................................................7
6 DEVICE OPERATIOn ........................................................................................8
7 TIMInG DIAGRAMS ..........................................................................................11
8 AbSOLUTE MAXIMUM RATInGS ...................................................................15
9 DC ELECTRICAL CHARACTERISTICS ..........................................................16
10 AC ELECTRICAL CHARACTERISTICS ........................................................17
11 ORDERInG InfORMATIOn ...........................................................................18
12 PACKAGE InfORMATIOn ..............................................................................19
13 REVISIOn HISTORY .......................................................................................22
2
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00A
11/24/09
IS24C02E
2K-bit
2-WIRE SERIAL CMOS EEPROM
1 fEATURES
• Two-Wire Serial Interface, I
2
C
TM
Compatible
– Bi-directional data transfer protocol
• Wide-voltage Operation
– Vcc = 1.8V to 5.5V
• Speed: 400 KHz (1.8V) and 1 MHz (2.5V~5.5V)
• Standby current: 1 mA
(max.), 1.8V
• Operating current: 3 mA (max.), 5.5V
• Hardware Data Protection
– Write Protect Pin
• Sequential & Random Read Features
• Memory organization: 2Kb (256 x 8)
• Page Size: 16 bytes
• Page write mode
– Partial page writes allowed
• Self timed write cycle: 5 ms (max.)
• Noise immunity on inputs, besides Schmitt trig-
ger
• High-reliability
– Endurance: 1 million cycles
– Data retention: 100 years
• Industrial temperature grade
• Packages: SOIC/SOP, TSSOP and uDFN
• Lead-free, RoHS, Halogen free, Green
ADVANCED INFORMATION
DECEMBER 2009
2 DESCRIPTIOn
The IS24C02E is an industrial standard electrically
erasable programmable read only memory (EEPROM)
device that utilizes the industrial standard 2-wire in-
terface for communications. The IS24C02E contains a
memory array of 2K bits (256x8), which is organized in
16-byte per page.
The EEPROM operates in a wide voltage range from
1.8V to 5.5V, which fits most application. The product
provides low-power operations and low standby current.
The device is offered in Lead-free, RoHS, halogen free
or Green package. The available package types are
8-pin SOIC/SOP, TSSOP and UDFN.
The IS24C02E is compatible to the standard 2-wire
bus protocol. The simple bus consists of Serial Clock
(SCL) and Serial Data (SDA) signals. Utilizing such bus
protocol, a Master device, such as a microcontroller,
can usually control one or more Slave devices, alike this
IS24C02E. The bit stream over the SDA line includes a
series of bytes, which identifies a particular Slave de-
vice, an instruction, an address within that Slave device,
and a series of data, if appropriate. The IS24C02E also
has a Write Protect function via WP pin to cease from
overwriting the data stored inside the memory array.
In order to refrain the state machine entering into a
wrong state during power-up sequence or a power
toggle off-on condition, a power on reset circuit is em-
bedded. During power-up, the device does not respond
to any instructions until the supply voltage (Vcc) has
reached an acceptable stable level above the reset
threshold voltage. Once Vcc passes the power on reset
threshold, the device is reset and enters into the Stand-
by mode. This would also avoid any inadvertent Write
operations during power-up stage. During power-down
process, the device will enter into standby mode, once
Vcc drops below the power on reset threshold voltage.
In addition, the device will be in standby mode after
receiving the Stop command, provided that no internal
write operation is in progress. Nevertheless, it is not rec-
ommended to send an command until the Vcc reaches
its operating level.
Copyright © 2009 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 or military, 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. 00A
11/24/09
3
IS24C02E
3 PIN CONFIGURATION
8-Pin SOIC, TSSOP
8-pad UDfn
A0
A1
A2
GND
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
(Top View)
4 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
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 wired with other open drain or open
collector outputs. However, the SDA pin requires a pull-up
resistor connected to the power supply.
A0, A1, A2
The A0, A1 and A2 are the device address inputs.
Typically, the A0, A1, and A2 pins are for hardware addressing
and a total of 8 devices can be connected on a single bus
system. When A0, A1, and A2 are left floating, the inputs are
internally defaulted to zero.
WP
WP is the Write Protect pin. While the WP pin is connected
to the power supply of IS24C02E, the entire array becomes
Write Protected (i.e. the device becomes Read only).
When WP is tied to Ground or left floating, the normal
write operations are allowed.
Vcc
Supply voltage
GnD
Ground of supply voltage
4
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00A
11/24/09
嵌入式系统
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