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WMS7100

Winbond
Part Number WMS7100
Manufacturer Winbond
Description (WMS7100 / WMS7101) NON-VOLATILE DIGITAL POTENTIOMETERS
Published Nov 5, 2009
Detailed Description PRELIMINARY DATASHEET WMS7100 / 7101 NON-VOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE, 10KOHM, 50KOH...
Datasheet PDF File WMS7100 PDF File

WMS7100
WMS7100

Overview
PRELIMINARY DATASHEET WMS7100 / 7101 NON-VOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE, 10KOHM, 50KOHM, 100KOHM RESISTANCE 256 TAPS WITHOUT / WITH OUTPUT BUFFER www.
DataSheet4U.
com -1- Publication Release Date: July 2003 Revision 1.
0 WMS7100 / 7101 1.
GENERAL DESCRIPTION The WMS7100/7101 is a single channel 256-tap non-volatile linear digital potentiometer available in 10KΩ, 50KΩ and 100KΩ resistance.
The device consists of Up/Down serial interface, tap register, decoder, resistor array, wiper switches, NV memory and control logics.
The WMS7100 device can be configured as a two-terminal variable resistor or a three-terminal voltage divider without an output buffer, but the WMS7101 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, RA/VA and RB/VB.
The wiper position, Rw/Vw, is controlled by Up/Down serial interface ( 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 • • • • • • • www.
DataSheet4U.
com Drop-in replacement for many popular parts Single linear-taper channel 256 taps 10K, 50K and 100K end-to-end resistance VSS to VDD terminal voltages 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: 8-pin PDIP, SOIC or MSOP Industrial temperature range: -40° to 85°C Single supply operation : 2.
7V to 5.
5V • • • • • -2- WMS7100 / 7101 3.
BLOCK DIAGRAM Tap Register RA/VA INC CS U/D Decoder Up/Down Serial Interface RW /VW RB/VB NV Memory VSS NV Memory Control NVMEM0 VDD FIGURE 1 – WMS7100 BLOCK DIAGRAM (Rheostat/Divider Mod...


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