wms7171 Winbond Electronics Corp America, wms7171 Datasheet - Page 2

• Manufacturer Part Number: wms7171
• Description: Non-volatile Digital Potentiometers With Up/down 3-wire Interface, 10kohm, 50kohm, 100kohm Resistance 100 Taps Without / With Output Buffer
• Manufacturer: Winbond Electronics Corp America

1. GENERAL DESCRIPTION
The WMS7170/7171 is a single channel 100-tap non-volatile linear digital potentiometer available in
10K:, 50K: and 100K: resistance. The device consists of Up/Down serial interface, tap register,
decoder, resistor array, wiper switches, NV memory and control logics.
The WMS7170 device can be configured as a two-terminal variable resistor or a three-terminal voltage
divider without an output buffer, but the WMS7171 device, which has a built-in output buffer, can only
be configured as a three-terminal voltage divider. Both devices can be used in a wide variety of
applications.
The output of the potentiometer is determined by its wiper position, which varies linearly between its
end terminals, R
( CS , INC and U/ D ) through the Tap Register (TR). In addition, the wiper position can also be
stored into a non-volatile memory location (NVMEM0), which is then automatically recalled upon
power up.
2. FEATURES
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Drop-in replacement for many popular parts
Single linear-taper channel
100 taps
10K, 50K and 100K end-to-end resistance
V
Automatic recall of wiper position when power-on
Potentiometer control through Up/Down (3-wire) serial interface
Endurance 100,000 cycles
Data retention 100 years
Package options:
Industrial temperature range: -40° to 85°C
Single supply operation : 2.7V to 5.5V
SS
to V
-
DD
8-pin PDIP, SOIC or MSOP
A
/V
terminal voltages
A
and R
B
/V
B
. The wiper position, R
- 2 -
w
/V
w,
is controlled by Up/Down serial interface
WMS7170 / 7171