WMS7140

PRELIMINARY WMS7140/1 NONVOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE, www.DataSheet4U.com 10KOHM, 50KOHM, 100KOHM RESISTANCE 16 TAPS WITH OPTIONAL OUTPUT BUFFER -1- Publication Release Date: April 21, 2005 Revision 1.1 WMS7140/1 1. GENERAL DESCRIPTION The WMS714x is a 16 non-volatile linear digital potentiometers available in 10KΩ, 50KΩ and 100KΩ 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 VA and VB terminal according to the content stored in the volatile Tap Register (TR) which is 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 Drop-in replacements for many popular parts Available output buffer for WMS7141 devices Single linear-taper channel 16...