WMS7170/1

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1. GENERAL DESCRIPTION

The WMS717x is a 100 non-volatile linear digital potentiometers available in 10K

Ω, 50KΩ and 100KΩ

resistance values. The WMS7170/1 can be used as a three-terminal potentiometer or as a two

terminal variable resistor in a wide variety of applications.

The output of each potentiometer is determined by the wiper position, which varies in linearly between

programmed through Up/Down (Increment/Decrement) interface. The channel has one non-volatile

memory location (NVMEM0) that can be directly written to by users through the Up/Down interface.

Power-on recall is also built in so the content of the NVMEM0 to Tap Register is automatically loaded.

B

The WMS7170/1 devices pin out the resistor wiper directly. The WMS7171 devices feature an output

buffer with 3mA minimum drive capability.

All the WMS7170/1 devices are single channel devices offered in 8-pin PDIP, SOIC and MSOP

packages. The WMS7170/1 devices operate over a wide operating voltage ranging from 2.7V to

5.5V.

2. FEATURES

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Drop-in replacements for many popular parts

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Available output buffer for WMS7171 devices

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Single linear-taper channel

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100 taps

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10K, 50K and 100K end-to end resistance

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Non-volatile storage of wiper positions with power-on recall

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Data storage and potentiometer control through Up/Down (3-wire) interface

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Endurance 100,000 write cycles

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Data retention 100 years

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Package options:

o

8-pin PDIP, SOIC or MSOP

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Industrial temperature range: -40° ~ 85°C

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Single supply operation 2.7V to 5.5V