X24641 Datasheet, PDF (2/13 Pages) Xicor Inc. – 400 KHz 2-Wire Serial E 2 PROM

X24641
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.
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 E²PROM array.
PIN NAMES
Symbol
S₀, S₁, S₂
SDA
SCL
WP
V_SS
V_CC
PIN CONFIGURATION
Description
Device Select Inputs
Serial Data
Serial Clock
Write Protect
Ground
Supply Voltage
7026 FRM T01
8-LEAD SOIC
S0
S1
S2
VSS
1
8
2
7
X24641
3
6
4
5
VCC
WP
SCL
SDA
7026 FM 02
2