IS24C32A ISSI [Integrated Silicon Solution, Inc], IS24C32A Datasheet - Page 2

• Manufacturer Part Number: IS24C32A
• Description: 64K-bit/32K-bit 2-WIRE SERIAL CMOS EEPROM
• Manufacturer: ISSI [Integrated Silicon Solution, Inc]

IS24C32A/B
IS24C64A/B
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTIONS
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-Ored 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 that are
hardwired or left not connected for hardware compatibility
with the 24C16. When pins are hardwired, as many as eight
32K/64K 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.
2
A0-A2
SDA
SCL
WP
Vcc
GND
GND
SDA
SCL
Vcc
WP
A0
A1
A2
Address Inputs
Serial Address/Data I/O
Serial Clock Input
Write Protect Input
Power Supply
Ground
5
6
7
1
2
3
4
8
nMOS
SLAVE ADDRESS
COMPARATOR
REGISTER &
WORD ADDRESS
COUNTER
ACK
CONTROL
LOGIC
PIN CONFIGURATION
8-Pin DIP, SOIC, TSSOP, and MSOP
WP
WP is the Write Protect pin. The input level determines if all,
partial, or none of the array is protected from modifications.
Write Protection
WP
GND or floating
Vcc
Integrated Silicon Solution, Inc. — 1-800-379-4774
GND
Clock
DI/O
A0
A1
A2
Array Addresses Protected
IS24C32A/64A
Entire Array
1
2
3
4
None
TIMING & CONTROL
>
HIGH VOLTAGE
GENERATOR,
DECODER
REGISTER
EEPROM
ARRAY
DATA
Y
IS24C32B
-FFFh
None
C00h
8
7
6
5
ISSI
VCC
WP
SCL
SDA
IS24C64B
-1FFFh
1800h
None
04/12/06
Rev. A
®