X24128P-1.8 查看數據表（PDF） - Xicor -> Intersil
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X24128P-1.8 Datasheet PDF : 17 Pages
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X24128
Xicor E2PROMs are designed and tested for applica-
tions 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 VSS or VCC as appro-
priate. If actively driven, they must be driven with
CMOS levels (driven to VCC or VSS).
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
WPEN bits.
PIN NAMES
Symbol
S0, S1, S2
SDA
SCL
WP
VSS
VCC
NC
PIN CONFIGURATION
Description
Device Select Inputs
Serial Data
Serial Clock
Write Protect
Ground
Supply Voltage
No Connect
7027 FM T01
Not to scale
.344”
S0
S1
NC
NC
NC
S2
VSS
14 Lead SOIC
1
14
2
13
3
12
4
11
X24128
5
10
6
9
7
8
.244”
VCC
WP
NC
NC
NC
SCL
SDA
.394”
S0
S1
NC
NC
NC
NC
S2
VSS
16 Lead SOIC
1
16
2
15
3
14
4
13
X24128
5
12
6
11
7
10
8
9
.244”
VCC
WP
NC
NC
NC
NC
SCL
SDA
.430”
S0
S1
S2
VSS
8 Lead PDIP
1
8
2
7
X24128
3
6
4
5
.325”
VCC
WP
SCL
SDA
7027 FM 02
2
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