Renesas X9313ZMT1

Overview

X9313ZMT1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 1kΩ end-to-end resistance, ±VCC terminal voltage range, and nonvolatile wiper position storage. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor in analog signal conditioning circuits requiring stable, repeatable resistance trimming under varying temperature conditions.

For engineers reviewing the X9313ZMT1 datasheet, X9313ZMT1 pinout, X9313ZMT1 application, or X9313ZMT1 equivalent, key selection criteria include its 1kΩ RTOTAL tolerance (±20%), 3-wire serial interface timing (tIW = 5µs), -40°C to +85°C industrial temperature range, and MSOP-8 package compatibility with automated SMT assembly.

Technical Context

The X9313ZMT1 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 resistance typically 40Ω at VCC = 5V.

Nonvolatile memory stores the last wiper position on CS↑ while INC = HIGH, ensuring power-up recall without external configuration. The device operates with VCC = 3V to 5.5V, supports terminal voltages from -VCC to +VCC, and maintains ratiometric temperature coefficient of ±20 ppm/°C for precision voltage division.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA, body size 3.0mm × 3.0mm × 0.85mm, pitch 0.65mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP4017T-103E/MS, the X9313ZMT1 uniquely combines 1kΩ low-RTOTAL, ±VCC analog terminal rating, and guaranteed nonvolatile recall-making it optimal for bipolar signal trimming where low resistance and power-cycle persistence are mandatory.

Availability

X9313ZMT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument gain trimming, and programmable power supply feedback requiring stable component supply, long-term calibration retention, and MSOP-8 SMT compatibility.

Supply support for X9313ZMT1 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 expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed for embedded analog trimming applications requiring nonvolatile setting retention, solid-state reliability, and simple GPIO-based digital control-targeting industrial automation, test equipment, and medical electronics.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for X9313ZMT1?

The maximum voltage difference ΔV = |VH − VL| for X9313ZMT1 is 4V, as specified in the Absolute Maximum Ratings table for the "X9313Z" variant. This limit applies regardless of VCC level and must not be exceeded to prevent damage to the internal resistor array or wiper switches. Operation within this 4V differential ensures long-term reliability and adherence to the ±20% RTOTAL tolerance specification.

Does X9313ZMT1 support true bipolar operation with negative supply rails?

Yes, X9313ZMT1 supports true bipolar operation: its RH/VH and RL/VL terminals accept voltages from −VCC to +VCC, and VSS is referenced to system ground. When VCC = 5V, terminals tolerate −5V to +5V, enabling direct use in AC-coupled audio paths or sensor bridges with negative excitation. However, VSS must remain at ground potential-no separate negative supply rail is used or required.

How does the nonvolatile memory store function work on X9313ZMT1?

The X9313ZMT1 stores the current wiper position in nonvolatile memory when CS transitions from LOW to HIGH while INC is held HIGH. This store operation completes in 10ms (tWR). Once stored, the value persists for 100 years and is automatically recalled within 10µs of power-up. No external write command or clock cycle is needed-only the precise CS↑/INC=HIGH edge sequence triggers storage.

Can X9313ZMT1 be used in a two-terminal variable resistor configuration?

Yes, X9313ZMT1 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 RW/VW as the two endpoints. In this mode, resistance varies from near-0Ω (wiper at shorted terminal) to RTOTAL (wiper at opposite end), with wiper resistance (≤100Ω) contributing directly to total value. This configuration is commonly used in LED current limiting and oscillator frequency tuning.

What is the recommended power-up sequence for reliable operation of X9313ZMT1?

The recommended power-up sequence for X9313ZMT1 is to apply VCC and VSS first, then assert CS and INC HIGH before or concurrently with VCC reaching final value. This prevents spurious wiper movement or unintended store operations during ramp-up. The device requires 1ms after VCC stabilization before full parameter compliance, and VCC ramp rate must stay within 0.2–50 V/ms to avoid latch-up or data corruption.