wms7140 Winbond Electronics Corp America, wms7140 Datasheet - Page 2

• Manufacturer Part Number: wms7140
• Description: Nonvolatile Digital Potentiometers With Up/down 3-wire Interface, 10kohm, 50kohm, 100kohm Resistance 16 Taps With Optional Output Buffer
• Manufacturer: Winbond Electronics Corp America

1. GENERAL DESCRIPTION
The WMS714x is a 16 non-volatile linear digital potentiometers available in 10K:, 50K: and 100K:
resistance values. The WMS7140/1 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
V
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.
The WMS7140/1 devices pin out the resistor wiper directly. The WMS7141 devices feature an output
buffer with 3mA minimum drive capability.
All the WMS7140/1 devices are single channel devices offered in 8-pin PDIP, SOIC and MSOP
packages. The WMS7140/1 devices operate over a wide operating voltage ranging from 2.7V to
5.5V.
2. FEATURES
A
and V
x
x
x
x
x
x
x
x
x
x
x
x
x
Drop-in replacements for many popular parts
Available output buffer for WMS7141 devices
Single linear-taper channel
16 taps
10K, 50K and 100K end-to end resistance
V
Non-volatile storage of wiper positions with power-on recall
Data storage and potentiometer control through Up/Down (3-wire) interface
Endurance 100,000 write cycles
Data retention 100 years
Package options:
Industrial temperature range: -40° ~ 85°C
Single supply operation 2.7V to 5.5V
SS
B
to V
o
terminal according to the content stored in the volatile Tap Register (TR) which is
DD
8-pin PDIP, SOIC or MSOP
terminal voltages
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WMS7140/1