Renesas X9C104SZT1

Overview

X9C104SZT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100-kΩ end-to-end resistance, 100 wiper tap points, nonvolatile wiper position storage, ±5 V terminal voltage rating, and 3 mA max active supply current. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning, precision biasing, and programmable gain control circuits.

For engineers reviewing the X9C104SZT1 datasheet, X9C104SZT1 pinout, X9C104SZT1 application, or X9C104SZT1 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases, and validated alternative parts - all grounded in Renesas FN8222 Rev 4.00 documentation.

Technical Context

The X9C104SZT1 implements a 99-resistor-element array with make-before-break wiper switching, controlled via a three-wire CS/U/D/INC interface. Its 7-bit up/down counter drives a decoder selecting one of 100 wiper positions, with wiper resistance typically 40 Ω and absolute linearity ±1 MI.

Nonvolatile memory stores wiper position on CS↑ while INC = HIGH, enabling automatic recall at power-up. The internal charge pump supports ±5 V analog terminal voltages with a single 5 V supply, though it introduces 20 mV_RMS noise at 850 kHz.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, surface-mount, 3.90 mm × 4.90 mm body, 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with X9C104SZT1, AD5204BRUZ100 offers multi-channel integration and lower wiper resistance but demands SPI infrastructure, while MCP41010-I/P reduces BOM count and cost but forfeits power-up position recall - making X9C104SZT1 optimal for standalone, self-contained trimming in industrial controls and analog front-ends.

Availability

X9C104SZT1 is available at Aetrix Electronics and suitable for audio equipment calibration, sensor signal conditioning, and programmable power supply feedback loops requiring stable component supply and long-term parameter retention.

Supply support for X9C104SZT1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The X9C104SZT1 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in analog signal-path tuning, bias control, and calibration-critical embedded systems.

FAQ

What is the maximum allowable voltage across VH/RH and VL/RL terminals for X9C104SZT1?

The X9C104SZT1 specifies a maximum differential voltage ΔV = |VH/RH − VL/RL| of 10 V. This limit applies regardless of individual terminal voltages, which may range from −5 V to +5 V referenced to VSS. Exceeding 10 V risks irreversible damage to the internal resistor array or switching network. Always ensure the voltage difference stays within this bound during operation and transient conditions.

Does X9C104SZT1 retain its wiper position after power loss?

Yes, X9C104SZT1 retains its wiper position in nonvolatile memory for up to 100 years. The position is stored when CS transitions HIGH while INC is held HIGH. Upon subsequent power-up, the device automatically recalls that stored value and positions the wiper accordingly - eliminating the need for initialization code or external memory in calibration-sensitive applications.

What is the wiper resistance specification for X9C104SZT1, and how does it affect circuit performance?

X9C104SZT1 has a typical wiper resistance of 40 Ω, with a maximum of 100 Ω. This series resistance directly adds to the effective output impedance when used as a variable resistor or voltage divider. In high-gain or low-noise amplifier feedback networks, it may introduce gain error or thermal noise; designers should verify impact using worst-case 100 Ω in calculations.

Can X9C104SZT1 operate with analog signals beyond the 5 V supply rail?

No - although X9C104SZT1 supports analog terminal voltages from −5 V to +5 V, the absolute maximum voltage on VH/RH or VL/RL relative to VSS is ±5 V. The device's internal charge pump enables this bipolar range from a single 5 V supply, but applying signals outside ±5 V violates absolute maximum ratings and may cause latch-up or permanent failure.

Is X9C104SZT1 compatible with industrial temperature range applications?

Yes, the X9C104SZT1 variant with "SIZ" suffix (e.g., X9C104SIZ) is rated for −40°C to +85°C operation. However, the specific part number X9C104SZT1 corresponds to the "SZ" marking, indicating the 0°C to +70°C commercial temperature grade per Renesas ordering table. For industrial environments, confirm use of X9C104SIZ or consult Renesas for qualified alternatives.