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WMS7201100S Datasheet(PDF) 2 Page - Winbond

Part # WMS7201100S
Description  256-TAP NON-VOLATILE DIGITAL POTENTIOMETER
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

WMS7201100S Datasheet(HTML) 2 Page - Winbond

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WMS7201
- 2 -
1. GENERAL DESCRIPTION
The WMS7201 is a 256-tap, single-channel non-volatile digital potentiometer available in 10K
Ω, 50KΩ
and 100K
Ω end-to-end resistances. These devices can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of applications.
The output of the potentiometer is determined by the wiper position, which varies linearly between VA
and VB terminal according to the content stored in the volatile Tap Register (TR). The settings of the
TR can be provided either directly by the user through the industry standard SPI interface, or by the
non-volatile memory (NVMEM0~3) where the previous settings are stored. When changes are made
to the TR to establish a new wiper position, the value of the setting can be saved into any non-volatile
memory location (NVMEM0~3) by executing a NVMEM save operation. Upon powerup the content of
the NVMEM0 is automatically loaded to the Tap Register.
The WMS7201 contains a single potentiometer in 8-pin PDIP, SOIC, MSOP or 10 pin TSSOP
packages and can operate over a wide operating voltage range from 2.7V to 5.5V. A selectable output
buffer is built-in for those applications where an output buffer is required.
2. FEATURES
256 taps for the potentiometer
End-to-end resistance available in 10K
Ω, 50KΩ and 100KΩ
Selectable output buffer for each channel
SPI Serial Interface for data transfer and potentiometer control
Daisy-chain operation for multiple devices (10-pin TSSOP package only)
Nonvolatile storage of four wiper positions per channel with power-on recall from NVMEM0
Low standby current (1
µA Max. with output buffer inactive)
Endurance 100K typical stores per bit
Register Data Retention 100 years
Industrial temperature range: -40 ~ 85
°C
Wide operating voltage range: 2.7V ~ 5.5V
Package option:
8-pin MSOP, 8-pin SOIC, 8-pin PDIP, 10-pin TSSOP


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