Renesas X9313UP-3

Overview

X9313UP-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 ±V_CC terminal voltage capability. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits, offering 50 kΩ end-to-end resistance, 3 V to 5.5 V supply operation, and industrial temperature range (–40°C to +85°C) in an 8-lead MSOP package.

For engineers reviewing the X9313UP-3 datasheet, X9313UP-3 pinout, X9313UP-3 application, or X9313UP-3 equivalent, key selection considerations include its 3-wire control protocol compatibility, nonvolatile recall on power-up, ±4.4 mA max wiper current rating, 100-year data retention, and suitability for closed-loop calibration, sensor offset adjustment, and programmable gain control where mechanical wear and drift must be eliminated.

Technical Context

The X9313UP-3 implements a 31-element resistor array with a digitally addressable wiper switch network controlled by a 5-bit up/down counter. Wiper position is set via edge-triggered INC input synchronized with U/D direction control and CS enable, enabling precise stepwise resistance adjustment without external clocking.

Its nonvolatile memory stores the last wiper position upon CS↑ while INC = HIGH, ensuring deterministic startup behavior. The device operates in make-before-break switching mode during tap transitions, minimizing signal interruption but temporarily reducing effective RTOTAL when stepping multiple positions.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA (PKG DWG # M8.118).

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 X9313UP-3 offers unique value in 3-wire simplicity, guaranteed power-up repeatability, and robust ±V_CC analog handling-making it optimal for space-constrained, single-channel, self-contained calibration nodes where reliability trumps resolution.

Availability

X9313UP-3 is available at Aetrix Electronics and suitable for precision analog trimming, sensor calibration, and programmable gain control requiring stable component supply across industrial, test equipment, and medical electronics programs.

Supply support for X9313UP-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 leader in precision analog and power management ICs, serving industrial, infrastructure, and high-end consumer markets with high-reliability, application-optimized solutions.

The X9313UP-3 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in systems demanding long-term stability, programmability, and nonvolatile configuration retention.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UP-3?

The X9313UP-3 supports a maximum differential voltage ΔV = |VH − VL| of 10 V under recommended operating conditions. This rating applies across its full industrial temperature range (–40°C to +85°C) and enables use in ±5 V analog signal paths without external protection components. Exceeding this limit risks permanent damage to the internal resistor array switches.

Does X9313UP-3 require an external clock or microcontroller to operate?

No, the X9313UP-3 operates autonomously using only three digital control lines (CS, U/D, INC) driven by any standard logic-level source. Its internal 5-bit up/down counter and decode logic eliminate the need for external clocks or firmware intervention-enabling direct GPIO control from microcontrollers, FPGAs, or even discrete logic circuits.

How does the nonvolatile memory in X9313UP-3 retain wiper position during power loss?

The X9313UP-3 uses EEPROM-based nonvolatile memory to store the current wiper position. A store operation is triggered by raising CS while INC is held HIGH; the value remains intact for 100 years without power. Upon subsequent power-up, the stored position is automatically loaded into the counter, setting RW/VW to the exact prior tap location.

Can X9313UP-3 be used in a two-terminal variable resistor configuration?

Yes, the X9313UP-3 supports both three-terminal potentiometer and two-terminal variable resistor configurations. In the latter, RH/VH and RW/VW are used as the two terminals, effectively creating a digitally adjustable resistance between them. The RL/VL terminal is left unconnected, and wiper movement adjusts the resistance value from near-zero to R_TOTAL.

What is the wiper resistance specification for X9313UP-3 and why does it matter?

The X9313UP-3 has a typical wiper resistance (R_W) of 40 Ω at V_CC = 5 V. This low on-resistance minimizes insertion error when used in feedback networks or voltage dividers, especially critical in high-gain or low-noise amplifier designs where even small series impedances degrade accuracy or increase thermal noise.