X9C102SZ

Overview

The X9C102SZ is a non-volatile digital potentiometer from the X9C10 series, manufactured by Renesas Electronics. It features a single channel with a resistance value of 1 kΩ and 100 taps, offering linear taper characteristics. The device operates on a single 5V supply voltage (4.5V to 5.5V range) and utilizes a 3-wire serial interface (CS, U/D, INC) for wiper position control. Key electrical parameters include a typical temperature coefficient of ±600 ppm/°C, a contact resistance of 40 Ω, and a tolerance of ±20%. It is housed in an 8-pin SOIC package.

Feature Summary

• Non-volatile memory retains wiper position data upon power loss and restores it at power-up.
• 100-tap resolution with linear resistance taper for precise parameter adjustment.
• Simple 3-wire serial interface (Up/Down, Increment, Chip Select) for easy microcontroller integration.
• Single-channel configuration with 1 kΩ total resistance.

Applications

• Signal processing circuits requiring adjustable gain or attenuation.
• Parameter adjustment in control systems where manual potentiometers are impractical.
• Voltage reference setting in sensor interfaces.

Procurement Notes

Verify the specific suffix 'SZ' against the manufacturer's datasheet to confirm pinout compatibility and environmental ratings. Ensure the required operating temperature range aligns with the component's specified limits (typically 0°C to +70°C for standard variants). Confirm that the 5V logic levels match the system's I/O requirements before procurement.

Selection Notes

Select this component when a compact, digitally controlled variable resistor is needed without mechanical wear. The 1 kΩ value suits low-current signal paths. Consider the ±20% tolerance if high precision is not critical. For applications requiring wider temperature ranges (-40°C to +85°C), verify if the industrial grade variant (e.g., X9C102SIZ) is necessary instead of the commercial grade SZ suffix.

Part Context

The X9C102SZ belongs to the XDCP™ family of digitally controlled potentiometers originally developed by Intersil and now produced by Renesas. This series integrates resistor arrays, wiper switches, and EEPROM into a single CMOS package, replacing traditional mechanical potentiometers in space-constrained designs.

Replacement Considerations

The X9C102SIZ is a verified alternative within the same family, offering the same electrical specifications but with an extended industrial temperature range (-40°C to +85°C) compared to the commercial range of the SZ variant. Other models like X9C103 or X9C104 offer different resistance values (10kΩ, 100kΩ) but share the same interface and package.