Renesas X9313UMT1

Overview

X9313UMT1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 3-wire serial interface (CS/U/D/INC), nonvolatile wiper position storage, and ±VCC terminal voltage capability. It implements a 31-element resistor array with temperature-compensated end-to-end resistance tolerance of ±20%, operates from 3V to 5.5V, and is used for precision analog trimming in power supply feedback loops, sensor calibration, and audio level control.

For engineers reviewing the X9313UMT1 datasheet, X9313UMT1 pinout, X9313UMT1 application, or X9313UMT1 equivalent, key selection criteria include its 50kΩ total resistance, MSOP-8 package, industrial temperature range (–40°C to +85°C), nonvolatile recall on power-up, and compatibility with low-power CMOS host controllers requiring make-before-break wiper switching.

Technical Context

The X9313UMT1 integrates a 5-bit up/down counter, nonvolatile memory for wiper position retention, and a resistor array with 31 series elements. Its control logic responds to negative-edge-triggered INC pulses while U/D sets direction, and CS enables selection and initiates nonvolatile store when high with INC high.

Wiper movement follows a "make-before-break" switching scheme to prevent open-circuit transients; terminal voltages support rail-to-rail operation from –VCC to +VCC, and wiper resistance is typically 40Ω at VCC = 5V. The device enters standby mode (≤500µA) when deselected, enabling low-power system integration.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant), body dimensions 3.0mm × 3.0mm × 0.85mm, lead pitch 0.65mm, RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ50 and MCP41050-I/P, the X9313UMT1 offers optimal balance of industrial temperature rating, ultra-low standby current (500µA), compact MSOP-8 footprint, and deterministic 3-wire timing-making it ideal for space-constrained, low-power embedded systems requiring robust analog trimming.

Availability

X9313UMT1 is available at Aetrix Electronics and suitable for power supply feedback trimming, audio signal level control, sensor offset calibration, and industrial process loop tuning requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313UMT1 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

Intersil Corporation is a leading provider of precision analog and power management ICs, acquired by Renesas Electronics in 2017; its products serve industrial, infrastructure, and high-reliability embedded markets.

The X9313 series was designed as a solid-state replacement for mechanical potentiometers in analog signal conditioning, offering nonvolatile storage, digital control, and enhanced reliability for trimming, calibration, and parameter adjustment tasks.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMT1?

The X9313UMT1 supports a maximum differential voltage ΔV = |VH − VL| of 10V, as specified for X9313U-series devices in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and must not be exceeded to prevent damage to the internal resistor array or switching elements. Operation within the recommended 3V–5.5V VCC range ensures safe compliance with this specification.

Does X9313UMT1 require external pull-up resistors on its control pins (CS, U/D, INC)?

No, X9313UMT1 does not require external pull-up resistors on CS, U/D, or INC inputs. Its input leakage current is ±10µA max, and VIH/VIL thresholds (2.0V/0.8V) are compatible with standard CMOS logic levels. Internal weak pull-downs are not present, so host MCU GPIOs must actively drive these pins to defined logic states during operation and power-up to prevent unintended wiper movement or store operations.

How is the wiper position stored and recalled in X9313UMT1?

The X9313UMT1 stores the current wiper position in nonvolatile memory when CS transitions from LOW to HIGH while INC is held HIGH; the stored value is automatically recalled on power-up and applied to the wiper within 10µs. This recall occurs independently of host initialization sequence, ensuring repeatable analog settings without software intervention-critical for fail-safe operation in regulated power supplies and safety-critical sensors.

Can X9313UMT1 be used in AC-coupled signal paths with bipolar voltages?

Yes, X9313UMT1 supports terminal voltages from –VCC to +VCC, enabling direct use in AC-coupled circuits with bipolar signals (e.g., ±5V audio or sensor interfaces). The RH/VH and RL/VL terminals tolerate –6V to +7V relative to VSS, and the wiper (RW/VW) maintains continuity across the full range. However, the device itself must be powered with VCC ≥ 3V referenced to VSS, and signal swing must remain within absolute maximum ratings.

What is the typical wiper resistance of X9313UMT1 and how does it affect circuit performance?

The typical wiper resistance of X9313UMT1 is 40Ω at VCC = 5V (max 100Ω), as specified in the Potentiometer Characteristics table. This series resistance introduces a small, fixed offset in voltage divider configurations and limits maximum wiper current to ±4.4mA. In high-impedance circuits (>100kΩ), its effect is negligible; however, in low-impedance loads (<1kΩ), it must be included in gain or ratio calculations to maintain accuracy-especially in precision reference or feedback applications.