Renesas X9313UMI-3T1

Overview

X9313UMI-3T1 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, operating from 3V to 5.5V supply and delivering 50 kΩ end-to-end resistance with ±20% tolerance.

For engineers reviewing the X9313UMI-3T1 datasheet, X9313UMI-3T1 pinout, X9313UMI-3T1 application, or X9313UMI-3T1 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), MSOP-8 RoHS-compliant packaging, nonvolatile memory endurance (100,000 cycles), wiper resistance (40 Ω typ. at 5V), and ratiometric temperature coefficient (±20 ppm/°C).

Technical Context

The X9313UMI-3T1 implements a 31-element resistor array with make-before-break wiper switching, decoded by a 5-bit up/down counter controlled via CS, U/D, and edge-triggered INC inputs. Wiper position is stored in nonvolatile memory on CS↑ while INC = HIGH, enabling automatic power-up recall.

It supports both three-terminal potentiometer and two-terminal variable resistor configurations. Terminal voltages span –V_CC to +V_CC, enabling bipolar signal conditioning, and its CMOS design limits active current to 3 mA max and standby current to 500 µA max.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA (M8.118 drawing), body size 3.0 mm × 3.0 mm × 1.1 mm max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP41050-I/P, the X9313UMI-3T1 uniquely supports ±V_CC terminal voltages and uses a minimal 3-wire interface-reducing GPIO count and enabling bipolar signal conditioning without level shifters or additional ICs.

Availability

X9313UMI-3T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trimming, audio level control, and embedded system parameter adjustment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313UMI-3T1 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 company, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed specifically for replacing mechanical potentiometers in automated calibration, sensor compensation, and programmable analog signal conditioning applications demanding nonvolatile setting retention and robust industrial operation.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMI-3T1?

The X9313UMI-3T1 supports terminal voltages from –V_CC to +V_CC. For the X9313UMI-3T1 variant rated for 3V to 5.5V supply, this means RH/VH and RL/VL can swing between –5.5V and +5.5V relative to V_SS. The absolute maximum differential voltage ΔV = |VH – VL| is 10V for X9313U-series devices, as specified in the Absolute Maximum Ratings table on page 5 of FN8177 Rev 7.00.

Does X9313UMI-3T1 require an external clock or microcontroller to operate?

No, the X9313UMI-3T1 operates autonomously using only three digital control lines: CS (chip select), U/D (direction), and INC (increment clock). It contains an internal 5-bit up/down counter and decode logic-no external clock or processor is needed beyond basic GPIO toggling. The INC input is negative-edge triggered, and wiper movement occurs synchronously with each valid edge while CS is LOW.

How is wiper position stored and recalled in X9313UMI-3T1?

Wiper position is stored in nonvolatile memory when CS transitions HIGH while INC is held HIGH. Upon subsequent power-up, the X9313UMI-3T1 automatically recalls the last stored value and configures the wiper to that tap position within 10 µs (t_PU). This behavior is guaranteed across the full –40°C to +85°C temperature range and supports 100-year data retention per the datasheet specification.

Can X9313UMI-3T1 be used in a two-terminal variable resistor configuration?

Yes, the X9313UMI-3T1 can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to the wiper RW/VW, leaving the other fixed terminal unused. In this mode, resistance varies from near-zero (wiper at shorted terminal) to R_TOTAL (wiper at open terminal). The datasheet confirms this usage on page 1 and in Figure 8(a) under "Basic Configurations of Electronic Potentiometers."

What is the wiper resistance specification for X9313UMI-3T1 and why does it matter?

The X9313UMI-3T1 has a typical wiper resistance of 40 Ω at V_CC = 5V (max 100 Ω), as specified in the Potentiometer Characteristics table on page 5. This series resistance directly adds to the effective output impedance seen by downstream circuitry-critical in high-gain op-amp feedback networks or low-impedance sensor bias paths where even tens of ohms can degrade accuracy or stability.