X24641S8-1.8 XICOR [Xicor Inc.], X24641S8-1.8 Datasheet - Page 2

• Manufacturer Part Number: X24641S8-1.8
• Description: 400 KHz 2-Wire Serial E 2 PROM
• Manufacturer: XICOR [Xicor Inc.]

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 (S
The device select inputs (S
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
priate. If actively driven, they must be driven with
CMOS levels.
Write Protect (WP)
The Write Protect input controls the Hardware Write
Protect feature. When held LOW, Hardware Write
Protection is disabled and the device can be written
normally. When this input is held HIGH, Write Protec-
tion is enabled, and nonvolatile writes are disabled to
the upper quadrant of the E
X24641
0
, S
1
, S
2
)
2
0
PROM array.
, S
1
, S
SS
2
or V
) are used to set
CC
as appro-
2
PIN NAMES
PIN CONFIGURATION
Symbol
S
SDA
SCL
WP
V
V
0
SS
CC
, S
V SS
1
, S
S 0
S 1
S 2
2
8-LEAD SOIC
1
2
3
4
X24641
Device Select Inputs
Serial Data
Serial Clock
Write Protect
Ground
Supply Voltage
8
7
6
5
Description
V CC
WP
SCL
SDA
7026 FM 02
7026 FRM T01