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