X9241A
PIN DESCRIPTIONS
Host Interface Pins
Serial Clock (SCL)
PIN CONFIGURATION
DIP/SOIC/TSSOP
V
V
/R
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
W0 W0
/R
The SCL input is used to clock data into and out of the
X9241A.
L0 L0
V
/R
W3 W3
V
/R
H0 H0
V
/R
L3 L3
A0
V
/R
H3 H3
Serial Data (SDA)
A2
A1
X9241A
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 guidelines for calculating typical
values on the bus pull-up resistors graph.
V
/R
W1 W1
A3
V
/R
L1 L1
SCL
V
/R
V
/R
W2 W2
H1 H1
SDA
V
V
/R
L2 L2
/R
V
H2 H2
SS
PIN NAMES
Symbol
Address
The Address inputs are used to set the least
significant 4 bits of the 8-bit slave address. A match in
the slave address serial data stream must be made
with the Address input in order to initiate
communication with the X9241A.
Description
Serial Clock
SCL
SDA
Serial Data
Address
A0–A3
V
V
/R –V /R
,
Potentiometer Pins
(terminal equivalent)
H0 H0 H3 H3
Potentiometer Pins
/R –V /R
L0 L0 L3 L3
V
/R –V /R
Potentiometer Pins
(wiper equivalent)
W0 W0 W3 W3
V /R (V /R —V /R ), V /R (V /R —V /R )
H
H
H0 H0
H3 H3
L
L
L0 L0
L3 L3
The R and R inputs are equivalent to the terminal
H
L
PRINCIPLES OF OPERATION
connections on either end of
potentiometer.
a
mechanical
The X9241A is a highly integrated microcircuit
incorporating four resistor arrays, their associated
registers and counters and the serial interface logic
providing direct communication between the host and
the XDCP potentiometers.
V /R (V /R —V /R )
W3 W3
W
W
W0 W0
The wiper outputs are equivalent to the wiper output of
a mechanical potentiometer.
Characteristics subject to change without notice. 2 of 18
REV 1.1.13 12/09/02
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XICOR [ XICOR INC. ]
