Renesas X9313UMIT1

Overview

X9313UMIT1 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 make-before-break switching, operates at 3V to 5.5V supply, and delivers 50 kΩ end-to-end resistance 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 X9313UMIT1 datasheet, X9313UMIT1 pinout, X9313UMIT1 application, or X9313UMIT1 equivalent, key selection criteria include its 50 kΩ RTOTAL tolerance (±20%), wiper resistance (40 Ω typ. @ 5V), nonvolatile recall on power-up, 3-wire control timing (tIW = 5 µs), and industrial temperature range (–40°C to +85°C).

Technical Context

The X9313UMIT1 integrates a 5-bit up/down counter, nonvolatile memory for wiper position retention, and a resistor array with 31 series elements and 32 accessible taps. Its control logic responds to CS (chip select), U/D (direction), and edge-triggered INC (increment) signals to move the wiper in discrete steps without wraparound.

Operation supports both three-terminal potentiometer (VH–VW–VL) and two-terminal variable resistor configurations. Terminal voltages span –VCC to +VCC, enabling bipolar signal handling, while wiper current is limited to ±4.4 mA and wiper resistance remains stable at ~40 Ω (typ.) under 5V operation.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Moisture Sensitivity Level 1, RoHS-compliant, Pb-free termination, M8.118 outline). Dimensions: 3.0 mm × 3.0 mm × 0.85 mm height, 0.65 mm pitch.

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 X9313UMIT1 uniquely combines nonvolatile wiper storage, ±VCC terminal capability, and 3-wire simplicity-making it optimal for unattended, field-calibrated analog systems requiring guaranteed repeatability after power interruption.

Availability

X9313UMIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, laser diode biasing, and audio volume control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313UMIT1 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 deep expertise in high-reliability industrial and infrastructure solutions.

The X9313UMIT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered for robust, maintenance-free analog trimming in harsh environments where mechanical potentiometers fail due to wear or contamination.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMIT1?

The X9313UMIT1 supports ΔV = |VH − VL| up to 10 V for the "U" variant (including X9313UMIT1), as specified in the Absolute Maximum Ratings table. This allows use in higher-voltage analog signal paths without external attenuation, provided terminal voltages remain within –VCC to +VCC bounds.

Does X9313UMIT1 require external pull-up resistors on its control pins?

No, X9313UMIT1 does not require external pull-ups on CS, U/D, or INC inputs. Its input leakage current is ±10 µA max, and VIH/VIL thresholds (2.0 V/0.8 V) are compatible with standard CMOS logic levels. Internal weak pull-downs are not present, so host MCU must drive all control lines actively.

How is wiper position stored and recalled in X9313UMIT1?

Wiper position is stored in nonvolatile memory when CS transitions HIGH while INC is held HIGH. On subsequent power-up, the X9313UMIT1 automatically recalls the last stored value and configures the wiper accordingly-no host initialization is required for baseline operation.

Can X9313UMIT1 be used in a two-terminal configuration with only RH/VH and RW/VW connected?

Yes, X9313UMIT1 supports two-terminal variable resistor mode using RH/VH and RW/VW, with RL/VL left unconnected. In this mode, resistance varies from near-zero (wiper at RH) to RTOTAL (wiper at RL), enabling current-limiting or gain-setting functions without a third reference node.

What is the typical wiper-to-terminal resistance variation across temperature for X9313UMIT1?

The X9313UMIT1 features temperature-compensated resistor elements with a ratiometric temperature coefficient of ±20 ppm/°C-meaning the relative resistance ratio between taps remains highly stable over temperature, critical for precision voltage division and gain accuracy.