Renesas X9313UMZ-3

Overview

X9313UMZ-3 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 50 kΩ end-to-end resistance. It operates from 3V to 5.5V, supports ±VCC terminal voltages, and is housed in an 8-lead MSOP package. It serves as a solid-state replacement for mechanical potentiometers in precision analog trimming applications.

For engineers reviewing the X9313UMZ-3 datasheet, X9313UMZ-3 pinout, X9313UMZ-3 application, or X9313UMZ-3 equivalent, key selection considerations include its 3-wire control protocol, 50 kΩ RTOTAL tolerance (±20%), nonvolatile recall on power-up, wiper resistance (40 Ω typ. at 5V), and industrial-grade temperature range (0°C to +70°C).

Technical Context

The X9313UMZ-3 implements a resistor ladder of 31 elements with electronically switched wiper access across 32 discrete taps. Its 5-bit up/down counter drives a decoder that selects one wiper node, while a nonvolatile memory block stores the last valid position for automatic recall after power cycling.

Control logic responds to edge-triggered INC input with direction determined by U/D level under active CS (LOW); store-to-memory occurs only when CS transitions HIGH while INC is HIGH. The device operates in make-before-break switching mode, ensuring continuity during wiper movement but temporarily reducing effective RTOTAL during multi-step transitions.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, body dimensions 3.0 mm × 3.0 mm × 0.85 mm, exposed pad not present, moisture sensitivity level (MSL) per Pb-free reflow profile.

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 X9313UMZ-3 offers native 3-wire simplicity and guaranteed power-up recall without host intervention-critical for unattended or safety-critical trimming where firmware reliability cannot be assumed.

Availability

X9313UMZ-3 is available at Aetrix Electronics and suitable for audio signal conditioning, DC power supply trimming, sensor offset compensation, and industrial analog input scaling requiring stable component supply and long-term calibration retention.

Supply support for X9313UMZ-3 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 precision analog and power management semiconductor provider, now part of Renesas Electronics, with legacy leadership in digitally controlled potentiometers and robust industrial-grade IC design.

The X9313 product line was engineered specifically for replacing mechanical potentiometers in embedded analog trimming applications where nonvolatile setting retention, ±VCC operation, and minimal GPIO resource usage are essential.

FAQ

What is the maximum allowable voltage difference between VH and VL terminals for X9313UMZ-3?

The X9313UMZ-3 specifies ΔV = |VH − VL| ≤ 10 V for the X9313U family, which includes this variant. This limit ensures safe operation of the internal resistor array and switching network. Exceeding 10 V risks irreversible damage to the thin-film resistors or CMOS switches, even if individual terminal voltages remain within −VCC to +VCC bounds.

Does X9313UMZ-3 require external pull-up resistors on its control pins (CS, U/D, INC)?

No, X9313UMZ-3 does not require external pull-ups. Its CS, U/D, and INC inputs have CMOS-compatible thresholds (VIH = 2 V min, VIL = 0.8 V max) and leakage current ≤±10 µA, allowing direct connection to microcontroller GPIOs configured as push-pull outputs. Pull-ups are unnecessary unless open-drain signaling is used, which is not supported by the device's control protocol.

Can X9313UMZ-3 be used in a bipolar signal path with ±5V supplies?

Yes, X9313UMZ-3 supports terminal voltages from −VCC to +VCC. With VCC = 5 V, VH and VL may swing from −5 V to +5 V, enabling direct use in bipolar op-amp circuits such as offset nulling or AC-coupled gain stages. However, the wiper current must remain within ±4.4 mA, and the total voltage across RH–RL must not exceed 10 V per datasheet limits.

How long does it take for X9313UMZ-3 to stabilize its wiper position after power-up?

The X9313UMZ-3 completes nonvolatile recall and wiper positioning within 10 µs after VCC reaches its final value and stabilizes, as specified by tPU (power-up to wiper stable). This fast settling enables immediate analog functionality post-boot without host delay or polling, critical for time-sensitive trimming in power supply or sensor front-end applications.

Is the wiper resistance of X9313UMZ-3 constant across all tap positions?

Yes, the wiper resistance (RW) of X9313UMZ-3 is specified as 40 Ω typical at VCC = 5 V and remains essentially constant across all 32 tap positions. This consistency ensures predictable insertion loss and minimal gain error in precision divider or rheostat configurations, unlike some DCPs where wiper resistance varies significantly with position.