Renesas X9313WMIT1

Overview

X9313WMIT1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 10 kΩ end-to-end resistance, 3-wire serial interface (CS/U/D/INC), nonvolatile wiper position storage, and ±VCC terminal voltage capability. It operates as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning circuits requiring stable, repeatable resistance trimming.

For engineers reviewing the X9313WMIT1 datasheet, X9313WMIT1 pinout, X9313WMIT1 application, or X9313WMIT1 equivalent, key selection criteria include its 10 kΩ RTOTAL tolerance (±20%), 5 µs INC-to-VW response time, 40 Ω typical wiper resistance at 5 V, -40°C to +85°C industrial temperature range, and MSOP-8 package compatibility with automated SMT assembly.

Technical Context

The X9313WMIT1 implements a 31-element resistor array with make-before-break wiper switching, enabling glitch-free tap transitions. Its 5-bit up/down counter drives a decoder that selects one of 32 wiper positions, with wiper movement direction controlled by the U/D input and step timing governed by negative-edge-triggered INC pulses.

Nonvolatile memory stores the last wiper position on CS↑ while INC = HIGH, ensuring automatic recall at power-up. The device supports both three-terminal voltage divider and two-terminal current-limiting configurations, with terminal voltages rated from -VCC to +VCC and absolute maximum VH–VL differential of 10 V for the W-series.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant), 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9313WMIT1 uniquely combines 3-wire simplicity, guaranteed power-up recall, and ±VCC terminal operation-making it optimal for industrial analog systems where reliability, bipolar signal handling, and minimal MCU intervention are prioritized.

Availability

X9313WMIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and medical instrument gain trimming requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313WMIT1 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 X9313WMIT1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, engineered specifically for replacing mechanical trimmers in analog signal-path applications demanding nonvolatile setting retention and robust operation across industrial temperature ranges.

FAQ

What is the operating temperature range for the X9313WMIT1?

The X9313WMIT1 is rated for industrial operation from -40°C to +85°C. This range is confirmed in the Ordering Information table (Page 2) and Recommended Operating Conditions (Page 5) of the FN8177 datasheet. The device maintains specified performance-including RTOTAL tolerance, wiper resistance, and nonvolatile memory retention-across this full range, making it suitable for harsh-environment deployments where mechanical potentiometers would degrade.

Does the X9313WMIT1 require an external power-on reset circuit?

No, the X9313WMIT1 does not require an external power-on reset circuit. Its internal architecture automatically recalls the last stored wiper position within 10 µs after VCC stabilizes (tPU, Page 7). However, the datasheet recommends bringing CS and INC HIGH before or concurrently with VCC during power-up to prevent unintended wiper movement or accidental store operations-this is a sequencing guideline, not a reset dependency.

Can the X9313WMIT1 be used with bipolar supplies such as ±5 V?

Yes, the X9313WMIT1 supports bipolar operation: its RH/VH and RL/VL terminals are rated from -VCC to +VCC (Page 5, Potentiometer Characteristics), and the W-series (including X9313WMIT1) allows a maximum |VH – VL| differential of 10 V. With VCC = 5 V, this permits direct use in ±5 V signal paths-for example, as a gain-setting element in dual-supply op-amp circuits-without level-shifting components.

How is the wiper position stored in nonvolatile memory on the X9313WMIT1?

The X9313WMIT1 stores the current wiper position when CS transitions from LOW to HIGH while the INC input is held HIGH (Page 3, Chip Select section). This store operation takes 10 ms (tWR, Page 7) and places the device into standby mode afterward. The stored value persists for 100 years and is automatically loaded to the wiper counter on subsequent power-up, ensuring deterministic startup behavior without MCU involvement.

What package type and lead finish does the X9313WMIT1 use?

The X9313WMIT1 uses an 8-lead MSOP package (package drawing M8.118, Page 10) with a 3.0 mm × 3.0 mm body and 0.65 mm lead pitch. It features a 100% matte tin (e3) termination finish, RoHS-compliant and compatible with both SnPb and Pb-free soldering processes, as confirmed in the Ordering Information footnote on Page 2 of the FN8177 datasheet.