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X9261US24 Datasheet(PDF) 3 Page - Intersil Corporation

Part # X9261US24
Description  Dual Digitally-Controlled Potentiometers
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X9261US24 Datasheet(HTML) 3 Page - Intersil Corporation

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3
FN8171.4
October 12, 2006
SYSTEM LEVEL APPLICATIONS
• Adjust the contrast in LCD displays
• Control the power level of LED transmitters in
communication systems
• Set and regulate the DC biasing point in an RF
power amplifier in wireless systems
• Control the gain in audio and home entertainment
systems
• Provide the variable DC bias for tuners in RF wire-
less systems
• Set the operating points in temperature control
systems
• Control the operating point for sensors in industrial
systems
• Trim offset and gain errors in artificial intelligent
systems
PIN CONFIGURATION
PIN ASSIGNMENTS
PIN DESCRIPTIONS
Bus Interface Pins
SERIAL OUTPUT (SO)
SO is a serial data output pin. During a read cycle,
data is shifted out on this pin. Data is clocked out by
the falling edge of the serial clock.
SERIAL INPUT
SI is the serial data input pin. All opcodes, byte
addresses and data to be written to the pots and pot
registers are input on this pin. Data is latched by the
rising edge of the serial clock.
SERIAL CLOCK (SCK)
The SCK input is used to clock data into and out of the
X9261.
SO
A0
NC
NC
VCC
RL0
1
2
3
4
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
HOLD
SCK
NC
NC
NC
NC
VSS
RW1
RH1
RL1
SOIC/TSSOP
X9261
NC
14
13
11
12
NC
RH0
RW0
CS
A1
SI
WP
Pin
(SOIC/
TSSOP)
Symbol
Function
1
SO
Serial Data Output for SPI bus
2
A0
Device Address for SPI bus.
3
NC
No Connect.
4
NC
No Connect.
5
NC
No Connect.
6
NC
No Connect.
7VCC
System Supply Voltage
8RL0
Low Terminal for Potentiometer 0.
9RH0
High Terminal for Potentiometer 0.
10
RW0
Wiper Terminal for Potentiometer 0.
11
CS
Device Address for SPI bus.
12
WP
Hardware Write Protect
13
SI
Serial Data Input for SPI bus
14
A1
Device Address for SPI bus.
15
RL1
Low Terminal for Potentiometer 1.
16
RH1
High Terminal for Potentiometer 1.
17
RW1
Wiper Terminal for Potentiometer 1.
18
VSS
System Ground
19
NC
No Connect
20
NC
No Connect
21
NC
No Connect
22
NC
No Connect
23
SCK
Serial Clock for SPI bus
24
HOLD
Device select. Pause the SPI serial bus.
X9261


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