X9241A Xicor, X9241A Datasheet - Page 2

• Manufacturer Part Number: X9241A
• Description: Quad Digitally Controlled Potentiometer (XDCP)
• Manufacturer: Xicor

X9241A
PIN DESCRIPTIONS
Host Interface Pins
Serial Clock (SCL)
The SCL input is used to clock data into and out of the
X9241A.
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 guidelines for calculating typical
values on the bus pull-up resistors graph.
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
communication with the X9241A.
Potentiometer Pins
V
The R
connections
potentiometer.
V
The wiper outputs are equivalent to the wiper output of
a mechanical potentiometer.
REV 1.1.13 12/09/02
H
W
/R
/R
H
W
(V
H
the
(V
H0
and R
W0
/R
Address
H0
/R
on
L
—V
W0
inputs are equivalent to the terminal
—V
H3
either
/R
W3
input
H3
/R
), V
W3
end
L
)
/R
in
L
(V
of
order
L0
/R
a
L0
mechanical
—V
to
L3
initiate
www.xicor.com
/R
L3
)
PIN CONFIGURATION
PIN NAMES
PRINCIPLES OF OPERATION
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.
SCL
SDA
A0–A3
V
V
V
H0
L0
W0
/R
/R
/R
L0
H0
W0
Symbol
V
V
–V
V
–V
V
W1
V
V
W0
–V
H0
H1
L1
L0
L3
H3
/R
/R
/R
/R
/R
/R
SDA
V
W3
/R
W1
SS
W0
A0
A2
H0
/R
L1
L0
H1
/R
L3
H3
Characteristics subject to change without notice.
W3
,
DIP/SOIC/TSSOP
1
2
3
4
5
6
7
8
9
10
X9241A
Serial Clock
Serial Data
Address
Potentiometer Pins
(terminal equivalent)
Potentiometer Pins
(wiper equivalent)
20
19
18
17
16
15
14
13
12
11
Description
V
V
V
V
V
V
A1
A3
SCL
V
H2
L3
CC
W3
H3
W2
L2
/R
/R
/R
/R
/R
/R
L3
L2
H2
H3
W3
W2
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