X24320
Xicor E2PROMs are designed and tested for applications
requiring extended endurance. Inherent data
retention is greater than 100 years.
PIN NAMES
Symbol
Description
S0, S1, S2
Device Select Inputs
SDA
SCL
WP
Serial Data
Serial Clock
Write Protect
Ground
PIN DESCRIPTIONS
Serial Clock (SCL)
The SCL input is used to clock all data into and out of the
device.
VSS
VCC
NC
Supply Voltage
No Connect
Serial Data (SDA)
SDA is a bidirectional pin used to transfer data into and
out of the device. It is an open drain output and
7035 FM T01
may be wire-ORed with any number of open drain or open
collector outputs.
PIN CONFIGURATION
An open drain output requires the use of a pull-up
resistor. For selecting typical values, refer to the Pull-
Not to scale
up resistor selection graph at the end of this data
sheet.
8-Lead DIP/SOIC
S
S
1
2
8
7
0
V
CC
WP
Device Select (S0, S1, S2)
The device select inputs (S0, S1, S2) are used to set the first
three bits of the 8-bit slave address. This
1
X24320
* .197”
S
6
5
2
3
4
SCL
SDA
V
SS
allows up to eight devices to share a common bus. These
inputs can be static or actively driven. If used
* .244”
statically they must be tied to VSS or VCC as appropriate.
If actively driven, they must be driven with
CMOS levels (driven to VCC or VSS).
14-Lead TSSOP
S
14
13
12
11
1
2
0
V
CC
S
WP
1
Write Protect (WP)
The Write Protect input controls the Hardware Write
Protect feature. When held LOW, Hardware Write
NC
3
4
NC
NC
.200”
X24320
NC
NC
10
9
5
6
7
NC
Protection is disabled. When this input is held HIGH, and the
WPEN bit in the Write Protect Register is set
S
2
SCL
SDA
V
SS
8
HIGH, the Write Protect Register is protected, preventing
changes to the Block Lock Protection and
.252”
WPEN bits.
* SOIC Measurement
7035 FM 02
2
ICMIC [ IC MICROSYSTEMS ]
