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X9316 반도체 회로 부품 판매점

E 2 POT Nonvolatile Digital Potentiometer



Xicor 로고
Xicor
X9316 데이터시트, 핀배열, 회로
Low Noise, Low Power, 32 Taps
X9316
E2POT™ Nonvolatile Digital Potentiometer
FEATURES
• Low Micropower CMOS
—VCC = 3V to 5.5V
—Active Current, 50µA (Increment) Max
—Standby Current, 400µA (Store) Max
• Low Noise
• 31 Resistive Elements
—Temperature Compensated
± 20% End to End Resistance Range
—–5V to +5V
• 32 Wiper Tap Points
—Wiper Positioned via Three-Wire Interface
—Similar to TTL Up/Down Counter
—Wiper Position Stored in Nonvolatile
Memory and Recalled on Power-Up
• 100 Year Wiper Position Data Retention
• X9316Z = 1K
• X9316W = 10K
• Packages
—14-Lead PDIP
—14-Lead SOIC
FUNCTIONAL DIAGRAM
DESCRIPTION
The Xicor X9316 is a solid state “micropower” nonvolatile
potentiometer and is ideal for digitally controlled resis-
tance trimming in battery-powered systems.
The X9316 is a resistor array composed of 31 resistive
elements. Between each element and at either end are
tap points accessible to the wiper element. 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 subse-
quent power-up operation.
The resolution of the X9316 is equal to the maximum
resistance value divided by 31. As an example, for the
X9316W (10K) each tap point represents 323.
All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.
U/D 5-BIT
INC UP/DOWN
CS COUNTER
CMOS SWITCH
VH
5-BIT
NONVOLATILE
MEMORY
VCC
VSS
V+
V–
STORE AND
RECALL
CONTROL
CIRCUITRY
E2POT™ is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
7000-1.5 7/16/97 T6/C0/D6 SH
ONE
OF
THIRTY-
TWO
WIPER
POSITION
DECODER
1
RESISTOR
ARRAY
VL
VW
7000 FRM F01
Characteristics subject to change without notice


X9316 데이터시트, 핀배열, 회로
X9316
PIN DESCRIPTIONS
VH and VL
The high (VH) and low (VL) terminals of the X9316 are
equivalent to the fixed terminals of a mechanical potenti-
ometer. The minimum voltage is Vand the maximum is
V+. It should be noted that the terminology of VL and 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.
VW
VW is the wiper terminal, equivalent to the movable termi-
nal 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 100.
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or decre-
mented.
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 X9316
will be placed in the low power standby mode until the
device is selected once again.
V+, V(Analog positive/negative power supply)
The V+ and Vpins supply an external voltage to the
wiper position decoder.
PIN CONFIGURATION
NC
INC
U/D
VH
VSS
V
NC
14-LEAD DIP/SOIC
1 14
2 13
3 12
4 X9316 11
5 10
69
78
NC
VCC
CS
VL
VW
V+
NC
7000 FRM 02
PIN NAMES
Symbol
VH
VW
VL
VSS
VCC
U/D
INC
CS
V+
V
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Input
Increment Input
Chip Select Input
Positive Analog Voltage
Negative Analog Voltage
7000 FRM T01.1
2




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