Renesas X9C503SZT1

Overview

X9C503SZT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 50kΩ end-to-end resistance resistor array with 100 wiper tap points, nonvolatile memory for power-up recall, and three-wire serial interface (CS/U/D/INC). It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming, voltage divider, and variable resistor applications within industrial control and signal conditioning circuits.

For engineers reviewing the X9C503SZT1 datasheet, X9C503SZT1 pinout, X9C503SZT1 application, or X9C503SZT1 equivalent, this page delivers verified specifications including ±20% RTOTAL tolerance, 40Ω typical wiper resistance, -5V to +5V terminal voltage range, 750µA max standby current, and SOIC-8 package compatibility - all critical for layout, power budgeting, and functional substitution decisions.

Technical Context

The X9C503SZT1 integrates a 7-bit up/down counter, one-of-hundred decoder, and 99-element temperature-compensated resistor array with make-before-break wiper switching. Its nonvolatile memory stores wiper position upon CS↑ with INC HIGH, enabling deterministic power-up behavior without external configuration.

Operation requires 5V ±10% supply, supports -40°C to +85°C industrial temperature range, and uses negative-edge-triggered INC with direction control via U/D. Charge pump circuitry enables ±5V analog terminal operation while maintaining single 5V digital supply - critical for mixed-signal interfacing without level-shifting.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, surface-mountable with 1.27mm lead pitch and 5.0mm × 4.0mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9C503SZT1, AD5204BRUZ10 offers quad integration but higher RTOTAL variation and no per-channel NVM, while MCP41050-I/P matches resistance value and supply flexibility but shifts wiper persistence responsibility to system-level design - making X9C503SZT1 optimal for single-channel, self-contained, calibration-critical applications.

Availability

X9C503SZT1 is available at Aetrix Electronics and suitable for industrial control systems, precision instrumentation, and embedded analog signal conditioning requiring stable component supply, long-term calibration integrity, and RoHS-compliant surface-mount packaging.

Supply support for X9C503SZT1 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 X9C503SZT1 belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimmers in applications demanding repeatable, programmable, and nonvolatile analog resistance adjustment.

FAQ

What is the resistance tolerance and temperature coefficient of the X9C503SZT1?

The X9C503SZT1 has an end-to-end resistance tolerance of ±20% and a temperature coefficient of ±300 ppm/°C over the industrial temperature range (-40°C to +85°C). These values are specified for the X9C503 variant in the FN8222 datasheet and directly impact voltage divider accuracy and thermal stability in precision analog circuits. The X9C503SZT1 maintains these characteristics in its SOIC-8 package.

Does the X9C503SZT1 retain its wiper position after power cycling?

Yes, the X9C503SZT1 retains its wiper position in nonvolatile memory and automatically recalls it upon power-up. This occurs after a successful store operation - triggered by raising CS HIGH while INC is held HIGH. The stored value persists for up to 100 years, eliminating the need for external memory or initialization routines in the host system. This behavior is intrinsic to the X9C503SZT1's architecture.

What are the absolute maximum voltage ratings on the analog terminals of the X9C503SZT1?

The VH/RH and VL/RL terminals of the X9C503SZT1 support voltages from -5V to +5V relative to VSS, with a maximum differential voltage (|VH/RH − VL/RL|) of 10V. Exceeding these limits risks permanent damage. These ratings are confirmed in the Absolute Maximum Ratings table of the FN8222 datasheet and apply specifically to the X9C503 variant, including the X9C503SZT1 package variant.

Can the X9C503SZT1 operate with a 3.3V supply instead of 5V?

No, the X9C503SZT1 requires a 5V ±10% supply (4.5V to 5.5V) as specified in the Recommended Operating Conditions. Its internal charge pump and logic thresholds are designed for 5V operation; using 3.3V will result in unreliable wiper control, failed nonvolatile stores, and undefined analog terminal behavior. This requirement is explicitly stated for the X9C503SZT1 in the datasheet.

What is the wiper resistance and how does it affect circuit performance?

The X9C503SZT1 has a typical wiper resistance of 40Ω, with a maximum of 100Ω. This series resistance introduces gain error in op-amp feedback configurations and affects THD in audio paths. For example, in a 50kΩ divider, 40Ω contributes ~0.08% error - acceptable for most industrial trims but critical in sub-0.1% precision designs. This value is measured at ±1mA and applies directly to the X9C503SZT1.