Renesas X9313US-3T2

Overview

X9313US-3T2 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. Its 10 kΩ end-to-end resistance, 40 Ω typical wiper resistance at 5V, and ±20% RTOTAL tolerance support stable gain/voltage setting in industrial sensor conditioning and power supply feedback loops.

For engineers reviewing the X9313US-3T2 datasheet, X9313US-3T2 pinout, X9313US-3T2 application, or X9313US-3T2 equivalent, key selection criteria include its 3-wire interface timing (tIW = 5 µs, tCYC = 2 µs), nonvolatile store-on-CS-high-with-INC-high behavior, -40°C to +85°C industrial temperature range, SOIC-8 package compatibility, and 100-year data retention-critical for field-deployed calibration-critical systems requiring zero-power-loss parameter persistence.

Technical Context

The X9313US-3T2 implements a 31-element resistor array with electronically switched wiper access to 32 discrete tap points, decoded from a 5-bit up/down counter. Wiper movement follows make-before-break switching, preventing open-circuit transients during multi-step adjustments.

Its control logic operates on negative-edge-triggered INC input with U/D direction select and CS-enabled active mode; nonvolatile store occurs only when CS transitions HIGH while INC is HIGH, ensuring deterministic memory writes without unintended updates during power-up or noise events.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch (JEDEC MS-012-AA).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41010-I/P, the X9313US-3T2 offers unique 3-wire control with deterministic nonvolatile store timing, lower interface pin count, and proven 100-year data retention-making it optimal for cost-sensitive, pin-constrained industrial systems where reliability and ease of integration supersede maximum resolution.

Availability

X9313US-3T2 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply feedback loop tuning, and laser diode bias control requiring stable component supply, long-term parametric consistency, and RoHS-compliant manufacturing.

Supply support for X9313US-3T2 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 leading provider of precision analog and power management solutions, serving industrial, infrastructure, and high-end consumer markets with high-reliability semiconductor components.

The X9313US-3T2 belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in calibration-critical analog signal paths where nonvolatile setting retention and solid-state reliability are mandatory.

FAQ

What is the supply voltage range supported by the X9313US-3T2?

The X9313US-3T2 operates from 3V to 5.5V, making it compatible with both 3.3V and 5V logic/system rails. This dual-voltage capability allows seamless integration into mixed-supply designs without level-shifting circuitry. The device maintains full functionality-including wiper movement, nonvolatile store, and terminal voltage compliance-across this entire range, as verified in the FN8177 Rev 7.00 datasheet Absolute Maximum and Recommended Operating Conditions tables.

How does the nonvolatile memory store function work on the X9313US-3T2?

The X9313US-3T2 stores the current wiper position in nonvolatile memory only when the CS pin transitions from LOW to HIGH while the INC pin is held HIGH. This specific timing condition prevents accidental writes during normal operation or power-up transients. Once stored, the value persists for 100 years and is automatically recalled on next power-up, ensuring repeatable startup behavior without host intervention-critical for unattended industrial equipment.

What is the maximum allowable voltage across the RH/VH and RL/VL terminals of the X9313US-3T2?

For the X9313US-3T2, the maximum differential voltage |VH − VL| is 10V, as specified for the "X9313W/U" variant group in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and ensures safe operation when used in high-gain amplifier feedback networks or bipolar signal conditioning circuits where terminal potentials may swing significantly relative to each other.

Can the X9313US-3T2 be used as a two-terminal variable resistor, and what are the design implications?

Yes, the X9313US-3T2 can operate as a two-terminal variable resistor by connecting either RH/VH or RL/VL to RW/VW and using the remaining fixed terminal with the wiper. In this mode, resistance varies from near-zero (wiper at shorted terminal) to RTOTAL (wiper at opposite end). Designers must account for wiper resistance (40 Ω typ.) and ensure current stays within ±4.4 mA limits to avoid self-heating-induced drift-verified in the Potentiometer Characteristics and DC Electrical Specifications sections of the datasheet.

What package type and footprint does the X9313US-3T2 use, and is it RoHS compliant?

The X9313US-3T2 uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), with 3.9 mm × 4.9 mm body dimensions and 1.27 mm lead pitch. It is Pb-free and RoHS compliant, utilizing 100% matte tin plating (e3 termination finish) compatible with both SnPb and lead-free reflow soldering processes-as confirmed in the Ordering Information and Pb-free reflow profile notes of the FN8177 datasheet.