X9C102SI

Overview

The X9C102SI is a digitally controlled potentiometer (XDCP) from the X9C10 series, manufactured by Renesas Electronics. It features a 1 kΩ linear resistance taper with 100 tap points and operates on a single 5V supply. The device integrates non-volatile memory to retain wiper position data across power cycles. Control is managed via a three-wire interface consisting of Chip Select (CS), Up/Down (U/D), and Increment (INC) inputs. Packaged in an 8-pin SOIC format, it functions as either a three-terminal potentiometer or a two-terminal variable resistor.

Feature Summary

• Non-volatile EEPROM storage retains wiper settings after power loss
• Three-wire serial interface for simplified control logic
• Linear resistance taper with 100 discrete tap positions
• Operates within -40°C to +85°C industrial temperature range

Applications

• Signal processing parameter adjustment
• Control system gain setting
• Hardware volume or bias level configuration

Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature grade (-40°C to +85°C) compared to commercial variants. Confirm the package type matches the required PCB footprint, as 'S' typically denotes SOIC while other letters may indicate PDIP. Check current stock status as lead times vary by distributor.

Selection Notes

Select this component when a non-volatile digital solution is required for 1 kΩ applications. Ensure the control circuitry supports the three-wire CS/U/D/INC protocol. Verify that the ±20% tolerance and ±600 ppm/°C temperature coefficient meet the circuit's precision requirements.

Part Context

This part belongs to the X9C10 family, which includes variants like X9C103 (10 kΩ) and X9C104 (100 kΩ). These devices share identical pinouts and control logic but differ in total resistance values. The X9C102 specifically provides the 1 kΩ option within this standardized interface ecosystem.

Replacement Considerations

Direct substitutes include X9C102SN (PDIP package) or X9C102SZ (commercial temp grade). Cross-brand equivalents require verification of interface compatibility and voltage levels.