X9312 15V Datasheet

X9312 Datasheet, PDF, Equivalent


Part Number

X9312

Description

Terminal Voltage 0V to 15V

Manufacture

Intersil Corporation

Total Page 9 Pages
Datasheet
Download X9312 Datasheet


X9312
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Digitally Controlled Potentiometer
(XDCP™)
FEATURES
• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +15V
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance range ± 20%
• Low power CMOS
—VCC = 5V
—Active current, 3mA max.
—Standby current, 1mA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• RTOTAL values = 10kΩ, 50kΩ, and 100k
• Packages
—8-lead SOIC and DIP
BLOCK DIAGRAM
X9312
Terminal Voltage 0V to +15V, 100 Taps
March 15, 2005
FN8176.0
DESCRIPTION
The Intersil X9312 is a digitally controlled
potentiometer (XDCP). The device consists of a
resistor array, wiper switches, a control section, and
nonvolatile memory. The wiper position is controlled
by a 3-wire interface.
The potentiometer is implemented by a resistor array
composed of 99 resistive elements and a wiper
switching network. Between each element and at
either end are tap points accessible to the wiper
terminal. The position of the wiper element is
controlled by the CS, U/D, and INC inputs. The
position of the wiper can be stored in nonvolatile
memory and then be recalled upon a subsequent
power-up operation.
The device can be used as a three-terminal
potentiometer or as a two-terminal variable resistor in
a wide variety of applications including:
– control
– parameter adjustments
– signal processing
VCC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
VSS (Ground)
General
U/D
INC
CS
RH/VH
RW/VW
RL/VL
VCC
VSS
7-Bit
Up/Down
Counter
7-Bit
Nonvolatile
Memory
Store and
Recall
Control
Circuitry
99
98
97
One 96
of
One
Hundred
Decoder
2
1
0
Transfer
Gates
Resistor
Array
Detailed
RH/VH
RL/VL
RW/VW
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

X9312
www.DataSheet4U.com
X9312
PIN DESCRIPTIONS
RH/VH and RL/VL
The high (RH/VH) and low (RL/VL) terminals of the
X9312 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is 0V
and the maximum is +15V. The terminology of RL/VL
and RH/VH references the relative position of the
terminal in relation to wiper movement direction
selected by the U/D input and not the voltage potential
on the terminal.
R /V
WW
Rw/Vw is the wiper terminal and is equivalent to the
movable terminal of a mechanical potentiometer. The
position of the wiper within the array is determined by
the control inputs. The wiper terminal series resistance
is typically 40.
Up/Down (U/D)
The U/D input controls the direction of the wiper
movement and whether the counter is incriminated or
decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling
INC will move the wiper and either increment or
decrement the counter in the direction indicated by the
logic level on the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the X9312
will be placed in the low power standby mode until the
device is selected once again.
PIN CONFIGURATION
INC
U/D
RH/VH
VSS
DIP/SOIC
18
2 X9312 7
36
45
VCC
CS
RL/VL
RW/VW
PIN NAMES
Symbol
RH/VH
RW/VW
RL/VL
VSS
VCC
U/D
INC
CS
Description
High terminal
Wiper terminal
Low terminal
Ground
Supply voltage
Up/Down control input
Increment control input
Chip select control input
PRINCIPLES OF OPERATION
There are three sections of the X9312: the input
control, counter and decode section; the nonvolatile
memory; and the resistor array. The input control
section operates just like an up/down counter. The
output of this counter is decoded to turn on a single
electronic switch connecting a point on the resistor
array to the wiper output. Under the proper conditions
the contents of the counter can be stored in
nonvolatile memory and retained for future use. The
resistor array is comprised of 99 individual resistors
connected in series. At either end of the array and
between each resistor is an electronic switch that
transfers the potential at that point to the wiper.
The wiper, when at either fixed terminal, acts like its
mechanical equivalent and does not move beyond the
last position. That is, the counter does not wrap
around when clocked to either extreme.
The electronic switches on the device operate in a
“make before break” mode when the wiper changes
tap positions. If the wiper is moved several positions,
multiple taps are connected to the wiper for tIW (INC to
VW change). The RTOTAL value for the device can
temporarily be reduced by a significant amount if the
wiper is moved several positions.
When the device is powered-down, the last wiper
position stored will be maintained in the nonvolatile
memory. When power is restored, the contents of the
memory are recalled and the wiper is set to the value
last stored.
2 FN8176.0
March 15, 2005


Features www.DataSheet4U.com ESIGNS NEW D NT R O F NDED CEME COMME NDED REPLA enter at E R T O N tC COMME Data Suppor il.com/t sc NO RE nical Sheet h s c r e T te r n w.i t ou contac TERSIL or ww IN 8 8 1- 8 ® X9312 Terminal Voltage 0V to +15V , 100 Taps March 15, 2005 FN8176.0 Dig itally Controlled Potentiometer (XDCP ) FEATURES • • • • Solid-state potentiometer 3-wire serial interface Terminal voltage, 0 to +15V 100 wiper t ap points —Wiper position stored in n onvolatile memory and recalled on power -up 99 resistive elements —Temperatur e compensated —End to end resistance range ± 20% Low power CMOS —VCC = 5V —Active current, 3mA max. —Standby current, 1mA max. High reliability — Endurance, 100,000 data changes per bit —Register data retention, 100 years RTOTAL values = 10kΩ, 50kΩ, and 100 kΩ Packages —8-lead SOIC and DIP D ESCRIPTION The Intersil X9312 is a digi tally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory..
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