X24F128 Datasheet, PDF (2/16 Pages) Xicor Inc. – 2-Wire SerialFlash with Block Lock TM Protection

X24F128
Xicor SerialFlash Memories are designed and tested
for applications requiring extended endurance.
Inherent data retention is greater than 100 years.
PIN DESCRIPTIONS
Serial Clock (SCL)
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 (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
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 appro-
priate. If actively driven, they must be driven with
CMOS levels.
Program Protect (PP)
The Program Protect input controls the Hardware
Program Protect feature. When held LOW, hardware
program protection is disabled and the device can be
programmed normally. When this input is held HIGH,
and the PPEN bit in the Program Protect Register is
set HIGH, program protection is enabled, and nonvola-
tile writes are disabled to the selected blocks as well
as the Program Protect Register itself.
PIN NAMES
Symbol
S₀, S₁, S₂
SDA
SCL
PP
V_SS
V_CC
NC
PIN CONFIGURATION
Description
Device Select Inputs
Serial Data
Serial Clock
Program Protect
Ground
Supply Voltage
No Connect
7012 FRM T01
S0
S1
S2
VSS
8-LEAD DIP
1
8
2
7
X24F128
3
6
4
5
VCC
PP
SCL
SDA
S0
S1
NC
NC
NC
NC
S2
VSS
16-LEAD SOIC
1
16
2
15
3
14
4
13
X24F128
5
12
6
11
7
10
8
9
VCC
PP
NC
NC
NC
NC
SCL
SDA
7012 ILL F02.1
2