Renesas X9C503SIT1

Overview

X9C503SIT1 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with nonvolatile wiper position storage, 50 kΩ end-to-end resistance, ±20% tolerance, and three-wire serial interface (CS/U/D/INC). It operates as a solid-state replacement for mechanical potentiometers in analog signal trimming, voltage divider, and variable resistor configurations within industrial control and sensor conditioning circuits.

For engineers reviewing the X9C503SIT1 datasheet, X9C503SIT1 pinout, X9C503SIT1 application, or X9C503SIT1 equivalent, this device delivers precise 100-tap digital adjustment with power-up recall, low 750 µA standby current, and ±5 V terminal voltage capability-critical for stable biasing and calibration in embedded analog subsystems.

Technical Context

The X9C503SIT1 integrates a 7-bit up/down counter, nonvolatile memory for wiper position retention, and a 99-resistor ladder with make-before-break wiper switching. Its internal charge pump enables ±5 V operation on a single 5 V supply while maintaining ratiometric temperature coefficient of ±20 ppm/°C.

Wiper movement is edge-triggered via INC input with direction controlled by U/D; CS initiates selection and triggers nonvolatile store when returned high with INC high. The device supports both three-terminal potentiometer and two-terminal variable resistor topologies without external components.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (M8.15E), RoHS-compliant, narrow-body surface-mount format with 1.27 mm lead pitch and 5.00 mm × 4.00 mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP41050-I/P, the X9C503SIT1 uniquely combines single-channel 50 kΩ resistance, three-wire simplicity, and guaranteed power-up wiper recall-making it optimal for self-contained analog trimming where reliability and zero-initialization overhead are critical.

Availability

X9C503SIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio level control requiring stable component supply and long-term parametric consistency.

Supply support for X9C503SIT1 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 X9C503SIT1 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, engineered for replacing mechanical trimmers in precision analog systems where long-term stability, digital configurability, and nonvolatile setting retention are essential.

FAQ

What is the maximum voltage that can be applied across the VH/RH and VL/RL terminals of the X9C503SIT1?

The X9C503SIT1 allows a maximum differential voltage of 10 V between VH/RH and VL/RL terminals, as specified in its Absolute Maximum Ratings table. This limit applies regardless of VCC level and ensures safe operation of the internal resistor array and switching network. Exceeding 10 V risks permanent damage to the device's analog path, even if individual terminal voltages remain within ±5 V relative to VSS.

Does the X9C503SIT1 retain its wiper position after power cycling?

Yes, the X9C503SIT1 retains its last-stored wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior occurs without host intervention once the wiper position has been stored using the CS-high-with-INC-high sequence. The device guarantees 100 years of data retention under normal operating conditions, making it suitable for unattended or maintenance-free applications.

Can the X9C503SIT1 operate with a supply voltage other than 5 V?

No-the X9C503SIT1 is specified only for 5 V ±10% (4.5 V to 5.5 V) operation. Its internal charge pump, logic thresholds, and resistor array biasing are optimized for this range. Operation outside this window may result in incorrect wiper positioning, failure to store values, or increased leakage. The device does not support 3.3 V or dual-supply operation.

What is the wiper resistance specification for the X9C503SIT1, and how does it affect circuit accuracy?

The X9C503SIT1 specifies wiper resistance as 40 Ω typical and 100 Ω maximum at ±1 mA wiper current. This series resistance introduces insertion error in voltage divider configurations-especially at low resistance settings-and must be factored into gain or attenuation calculations. For high-precision applications, buffer amplifiers are recommended to isolate the wiper from load effects.

Is the X9C503SIT1 pin-compatible with other members of the X9Cxxx family, such as X9C103 or X9C104?

Yes-the X9C503SIT1 shares identical pinout, package (SOIC-8 M8.15E), and interface protocol with X9C102, X9C103, and X9C104. Only the end-to-end resistance differs (50 kΩ vs. 1 kΩ/10 kΩ/100 kΩ). This allows direct substitution in existing layouts when resistance value change is acceptable, provided thermal drift (±300 ppm/°C) and power rating (10 mW) are verified for the target application.