X9C104ST1

Overview

The X9C104ST1 is a digitally controlled potentiometer (XDCP) manufactured by Renesas Electronics Corporation. It features a single-channel, linear taper resistance network with a nominal value of 100 kΩ and 100 tap positions. The device utilizes non-volatile memory to retain the wiper setting during power-off conditions. Control is managed via a three-wire serial interface consisting of Chip Select (CS), Up/Down (U/D), and Increment (INC) inputs. It operates on a single 5 V supply voltage within a commercial temperature range of 0°C to +70°C. The component is housed in an 8-lead SOIC surface-mount package.

Feature Summary

• Non-volatile memory retains wiper position after power loss
• 100 kΩ resistance with 100 discrete tap positions
• 3-Wire serial control interface (CS, U/D, INC)
• Single channel, linear taper configuration

Applications

• Signal processing parameter adjustment
• Control circuit variable resistance
• General-purpose digital potentiometry

Part Context

The X9C104ST1 belongs to the X9C10 series of XDCP devices. This specific part number indicates a tape-and-reel packaging format. The 'ST' suffix typically denotes the commercial temperature grade (0°C to +70°C). The device is functionally compatible with other members of the X9C10 family, such as the X9C102, X9C103, and X9C503, which share similar pinouts and control logic but differ in resistance values.

Replacement Considerations

Public documentation identifies the X9C104SZT1 as a direct replacement for the X9C104ST1. The X9C104SZT1 offers identical electrical specifications but is packaged in tubes rather than reels. Other potential substitutes include the DS1804Z-100 from Analog Devices, though verification of pin compatibility and interface timing is required.