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PDF X9C303 Data sheet ( Hoja de datos )

Número de pieza X9C303
Descripción Digitally Controlled Potentiometer
Fabricantes Xicor 
Logotipo Xicor Logotipo



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No Preview Available ! X9C303 Hoja de datos, Descripción, Manual

APPLICATION NOTE
AVAILABLE
AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN92
Terminal Voltage ±5V, 100 Taps, Log Taper
X9C303
Digitally Controlled Potentiometer (XDCP)
FEATURES
• Solid-state potentiometer
• Three-wire serial interface
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements, log taper
—Temperature compensated
—End to end resistance, ±15%
—Terminal voltages, ±5V
• Low power CMOS
—VCC = 5V
—Active current, 3mA max.
—Standby current, 750µA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• X9C303, 32 k
• Packages
www.DataSheet4U.com — 8-lead TSSOP
—8-lead SOIC
—8-pin DIP
DESCRIPTION
The Xicor X9C303 is a digitally controlled potentiome-
ter (XDCP). The device consists of a resistor array,
wiper switches, a control section, and nonvolatile
memory. The wiper position is controlled by a three-
wire interface.
The resistor array is composed of 99 resistive ele-
ments. Between each element and at either end are
tap points accessible to the wiper terminal. The posi-
tion 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 potentio-
meter or as a two-terminal variable resistor in a wide
variety of applications ranging from control, to signal
processing, to parameter adjustment. Digitally-
controlled potentiometers provide three powerful appli-
cation advantages; (1) the variability and reliability of a
solid-state potentiometer, (2) the flexibility of com-
puter-based digital controls, and (3) the use of nonvol-
atile memory for potentiometer settings retention.
BLOCK DIAGRAM
U/D
INC
CS
7-Bit
Up/Down
Counter
7-Bit
Nonvolatile
Memory
Store and
Recall
VCC
VSS
Control
Circuitry
XDCPis a trademark of Xicor, Inc.
REV 1.1 4/27/01
99
98
97
96
One
of
One-
Hundred
Decoder
2
1
0
RH/VH
Transfer
Gates
Resistor
Array
RL/VL
RW/VW
www.xicor.com
Characteristics subject to change without notice. 1 of 10

1 page




X9C303 pdf
X9C303
Test Circuit #1
VH
VS Test Point
VW
VL
Test Circuit #2
VH
Test Point
VW
Force
VL Current
Circuit #3SPICE Macro Model
RTOTAL
RH RL
CH
CW CL
10pF
10pF
25pF
RW
RECOMMENDED OPERATING CONDITIONS
Temperature
Commercial
Industrial
Military
Min.
0°C
–40°C
–55°C
Max.
+70°C
+85°C
+125°C
Supply Voltage
X9C303
Limits
5V ±10%
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.)
Symbol
ICC
ISB
ILI
VIH
VIL
RW
VH
VL
CIN(2)
CH/CL/CW
Parameter
VCC active current
Standby supply current
CS, INC, U/D input leakage
current
CS, INC, U/D input HIGH
voltage
CS, INC, U/D input LOW
voltage
Wiper resistance
VH terminal voltage
VL terminal voltage
CS, INC, U/D input capacitance
Potentiometer capacitance
Min.
2
–1
–5
–5
Limits
Typ.1
1
Max.
3
200 750
±10
VCC + 1
0.8
40 100
+5
+5
10
10/10/25
Unit
mA
µA
µA
V
V
V
V
pF
pF
Test Conditions
CS = VIL, U/D = VIL or VIH and
INC = 0.4V to 2.4V @ max. tCYC
CS = VCC – 0.3V, U/D and INC
= VSS or VCC – 0.3V
VIN = VSS to VCC
Max. Wiper Current ±1mA
VCC = 5V, VIN = VSS,
TA = 25°C, f = 1MHz
See Circuit 3
Standard Parts
Part Number
X9C303
Maximum Resistance
32K
Notes: (1) Typical values are for TA = 25°C and nominal supply voltage.
(2) This parameter is periodically sampled and not 100% tested.
Wiper Increments
Log Taper
Minimum Resistance
40Typical
REV 1.1 4/27/01
www.xicor.com
Characteristics subject to change without notice. 5 of 10

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