Renesas X9313UMI-3

Overview

X9313UMI-3 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 32-tap linear resistor array with nonvolatile wiper position storage. It operates as a three-terminal potentiometer or two-terminal variable resistor, supports ±V_CC terminal voltages, uses a 3-wire serial interface (CS/U/D/INC), and delivers 50 kΩ end-to-end resistance across -40°C to +85°C industrial temperature range.

For engineers reviewing the X9313UMI-3 datasheet, X9313UMI-3 pinout, X9313UMI-3 application, or X9313UMI-3 equivalent, key selection considerations include its MSOP-8 package, 3V–5.5V supply compatibility, ±4.4 mA max wiper current, 100,000-cycle endurance, and power-up recall of stored wiper position - critical for precision analog trimming in embedded control systems.

Technical Context

The X9313UMI-3 integrates a 31-element resistor ladder, 5-bit up/down counter, make-before-break wiper switching, and EEPROM-based nonvolatile memory. Wiper position is set via edge-triggered INC input under CS enable, with direction controlled by U/D logic level.

Its architecture enables deterministic tap positioning without wraparound at extremes, supports ratiometric operation with ±20% RTOTAL tolerance, and maintains stable linearity (±1 MI absolute, ±0.2 MI relative) over temperature via on-chip compensation - all while operating at ≤3 mA active current and ≤500 µA standby current.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA, body size 3.0 mm × 3.0 mm × 1.1 mm max height.

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 X9313UMI-3 uniquely combines 3-wire simplicity, guaranteed power-up recall, and industrial temperature rating in an MSOP-8 package - making it optimal for self-contained analog trimming where MCU resources or bus overhead are constrained.

Availability

X9313UMI-3 is available at Aetrix Electronics and suitable for industrial process controllers, medical instrumentation calibration, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9313UMI-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 solutions provider, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure ICs.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in analog signal conditioning, offering nonvolatile storage, temperature-stable linearity, and robust digital control - targeting embedded systems where recalibration, maintenance, and long-term stability are critical.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMI-3?

The X9313UMI-3 supports terminal voltages from -VCC to +VCC, with ΔV = |VH - VL| rated at 10 V for X9313U-series devices. At VCC = 5 V, this permits up to ±5 V across the end terminals - sufficient for most single-supply op-amp interfaces and compatible with rail-to-rail input/output stages without external clamping.

Does X9313UMI-3 require an external clock or microcontroller to retain wiper position after power loss?

No. The X9313UMI-3 contains on-chip EEPROM that automatically stores the wiper position when CS transitions HIGH while INC is HIGH. Upon power restoration, the device recalls this value and sets the wiper without any external intervention - eliminating dependency on host MCU firmware or backup power sources.

Can X9313UMI-3 be used in a two-terminal variable resistor configuration?

Yes. The X9313UMI-3 supports both three-terminal potentiometer and two-terminal variable resistor modes. In two-terminal mode, either RH/VH or RL/VL is left unconnected while RW/VW and the remaining terminal form a programmable resistance - commonly used for gain-setting or bias-current adjustment in amplifier circuits.

What is the wiper resistance specification for X9313UMI-3 and how does it affect circuit performance?

The X9313UMI-3 specifies wiper resistance as 40 Ω typical (max 100 Ω) at VCC = 5 V. This low on-resistance minimizes insertion error in precision applications such as op-amp feedback networks or sensor bridge balancing, ensuring <0.1% gain deviation even at 50 kΩ total resistance - critical for maintaining accuracy in closed-loop analog systems.

How does the make-before-break switching behavior of X9313UMI-3 improve system reliability?

The X9313UMI-3 employs make-before-break wiper switching, meaning multiple taps connect briefly during position transitions. This prevents momentary open-circuit conditions that could cause output glitches or latch-up in op-amp feedback paths - especially important in high-gain, low-noise analog circuits like instrumentation amplifiers or sensor signal chains where transient disruption must be avoided.