X9418 Xicor, X9418 Datasheet - Page 2

• Manufacturer Part Number: X9418
• Description: Dual Digitally Controlled Potentiometers
• Manufacturer: Xicor

X9418
PIN DESCRIPTIONS
Host Interface Pins
Serial Clock (SCL)
The SCL input is used to clock data into and out of the
X9418.
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.
Device Address (A
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 X9418. A maximum of 16
devices may occupy the 2-wire serial bus.
Potentiometer Pins
V
The V
terminal connections on either end of a mechanical
potentiometer.
V
The wiper outputs are equivalent to the wiper output of
a mechanical potentiometer.
Hardware Write Protect Input (WP)
The WP pin when low prevents nonvolatile writes to
the Data Registers.
Analog Supplies V+, V-
The Analog Supplies V+, V- are the supply voltages
for the XDCP analog section.
REV 1.1.5 7/23/02
H
W
/R
/R
H
W
H
the
(V
/R
(V
H0
H
W0
/R
Address
and V
/R
H0
W0
—V
—V
L
H1
0
/R
– A
/R
W1
L
input
3
H1
inputs are equivalent to the
)
/R
), V
W1
L
)
in
/R
L
(V
order
L0
/R
L0
to
—V
L1
initiate
www.xicor.com
/R
L1
)
PIN CONFIGURATION
PIN NAMES
SCL
SDA
A0-A3
V
V
V
WP
V+,V-
V
V
NC
H0
L0
W0
CC
SS
/R
/R
/R
Symbol
L0
H0
W0
–V
–V
R
R
R
–V
R
R
R
R
R
R
L1
W0
W1
W1
H1
H0
H1
H1
L0
L1
L1
W1
/R
/V
/V
/V
SDA
/V
/V
SDA
/V
SCL
/R
V
/V
/V
/V
V
V
WP
NC
NC
NC
W0
W1
/R
CC
A2
A1
A1
W1
L1
H0
H1
SS
H1
SS
A3
V-
L0
L1
L1
H1
Characteristics subject to change without notice.
W1
,
10
11
12
10
11
12
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
DIP/SOIC
Serial Clock
Serial Data
Device Address
Potentiometer Pins
(terminal equivalent)
Potentiometer Pins
(wiper equivalent)
Hardware Write Protection
Analog Supplies
System Supply Voltage
System Ground
No Connection
TSSOP
X9418
X9418
13
14
14
13
24
23
22
21
20
19
18
17
16
24
23
22
21
20
19
18
17
16
15
5
Description
V+
NC
NC
NC
A0
NC
A3
SCL
NC
NC
NC
V-
WP
A2
V
V
V
V
NC
NC
NC
V+
A0
NC
W0
H0
L0
CC
/R
/R
/R
L0
H0
W0
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