Renesas X9313UMI

Overview

X9313UMI from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 50 kΩ end-to-end resistance, ±V_CC terminal voltage capability, and nonvolatile wiper position storage. It operates from 3V to 5.5V, consumes ≤3 mA active current, and is housed in an 8-lead MSOP package for precision analog trimming in industrial temperature range (–40°C to +85°C).

For engineers reviewing the X9313UMI datasheet, X9313UMI pinout, X9313UMI application, or X9313UMI equivalent, key selection criteria include its 3-wire serial interface timing (t_CYC = 2 µs), wiper resistance (40 Ω typ. at V_CC = 5V), absolute linearity (±1 MI), ratiometric tempco (±20 ppm/°C), and guaranteed 100-year data retention.

Technical Context

The X9313UMI implements a 31-element resistor array with make-before-break wiper switching, controlled by a 5-bit up/down counter decoded to select one of 32 tap points. Its nonvolatile memory stores wiper position on CS↑ while INC = HIGH, enabling power-up recall without external configuration.

Terminal voltage tolerance spans –V_CC to +V_CC, supporting bipolar signal conditioning; wiper current is limited to ±4.4 mA, and RTOTAL exhibits ±20% initial tolerance with ±300 ppm/°C temperature coefficient - critical for stable gain/offset calibration across thermal cycles.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA (M8.118), 3.0 mm × 3.0 mm × 0.85 mm body height, 0.65 mm lead 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 X9313UMI uniquely supports true bipolar terminal voltages (–V_CC to +V_CC) and requires no dedicated serial bus controller - making it optimal for legacy microcontroller GPIO-limited designs handling AC or dual-rail analog signals.

Availability

X9313UMI is available at Aetrix Electronics and suitable for industrial sensor calibration, laser diode biasing, precision instrumentation offset trimming, and audio channel balancing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313UMI 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 semiconductors.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in calibration-critical systems where nonvolatile setting retention, temperature stability, and bipolar signal compatibility are mandatory.

FAQ

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

The X9313UMI supports a maximum differential voltage ΔV = |VH − VL| of 10 V, as specified for X9313U-series devices in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and must not be exceeded to ensure reliability and prevent damage to the internal resistor array or wiper switches.

Does the X9313UMI require external pull-up resistors on its CS, U/D, or INC pins?

No, the X9313UMI does not require external pull-up resistors. Its digital inputs (CS, U/D, INC) have CMOS-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2 V) and exhibit ±10 µA leakage current, allowing direct connection to microcontroller GPIOs configured as push-pull outputs. Pull-ups are unnecessary unless open-drain driving is used.

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

Yes, the X9313UMI can be configured as a two-terminal variable resistor by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal plus the wiper. This mode is explicitly supported in the datasheet and maintains the same 50 kΩ end-to-end resistance and nonvolatile storage functionality as the three-terminal potentiometer mode.

What is the wiper resistance specification for the X9313UMI at 3.3V supply?

The datasheet specifies wiper resistance (R_W) as 40 Ω typical at V_CC = 5 V. While no explicit value is given for 3.3 V, the device's CMOS construction implies R_W increases slightly at lower V_CC; design margin should assume ≤100 Ω maximum based on process variation and worst-case characterization across the 3V–5.5V range.

How does the X9313UMI handle power-up sequencing to prevent unintended wiper movement?

To prevent spurious wiper changes or accidental store operations, the X9313UMI datasheet mandates that CS and INC be held HIGH before or concurrently with V_CC ramp-up. This ensures the control logic remains in standby until the host system intentionally asserts CS LOW - a requirement verified by t_PU (power-up to wiper stable) of 10 µs after V_CC settles.