Renesas X9313WM-3T2

Overview

X9313WM-3T2 from Intersil is a digitally controlled potentiometer (XDCP™) with linear taper, 32-tap resolution, 3-wire serial interface, ±V_CC terminal voltage capability, and 10 kΩ end-to-end resistance. It functions as a solid-state replacement for mechanical potentiometers in analog signal conditioning circuits requiring nonvolatile wiper position storage and recall on power-up. Used in precision voltage divider and variable resistor configurations within industrial sensor calibration and power supply feedback loops.

For engineers reviewing the X9313WM-3T2 datasheet, X9313WM-3T2 pinout, X9313WM-3T2 application, or X9313WM-3T2 equivalent, key selection criteria include its 3-wire up/down interface timing, 10 kΩ RTOTAL tolerance (±20%), -40°C to +85°C industrial temperature range, MSOP-8 package, and nonvolatile memory endurance of 100,000 cycles.

Technical Context

The X9313WM-3T2 implements a 31-element resistor array with electronically switched wiper access at 32 discrete tap points, controlled by CS, U/D, and INC signals. Its 5-bit up/down counter drives a decoder that selects one wiper position, enabling precise digital adjustment without external microcontroller firmware overhead.

Wiper position is stored in nonvolatile memory upon CS rising edge while INC is HIGH, and automatically recalled at power-up. The device supports both three-terminal potentiometer and two-terminal variable resistor topologies, with terminal voltages rated from -V_CC to +V_CC and absolute linearity error limited to ±1 MI (minimum increment).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant), 3.0 mm × 3.0 mm body, 0.65 mm pitch, Pb-free (RoHS-compliant) termination.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ10 and MCP41010-I/P, the X9313WM-3T2 offers unique 3-wire simplicity and bipolar terminal voltage support-critical for analog signal chains operating across rail-to-rail ranges-while maintaining industrial-grade temperature performance and nonvolatile reliability in compact MSOP-8 form factor.

Availability

X9313WM-3T2 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and embedded system parameter tuning requiring stable component supply, long-term obsolescence management, and RoHS-compliant manufacturing.

Supply support for X9313WM-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 precision analog and power management semiconductor company, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9313 product line was designed specifically for solid-state replacement of mechanical potentiometers in analog control and trimming applications demanding nonvolatile setting retention, wide temperature operation, and robust ESD immunity.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313WM-3T2?

The X9313WM-3T2 specifies ΔV = |VH − VL| ≤ 10 V under recommended operating conditions. This limit applies regardless of VCC level and is defined in the Absolute Maximum Ratings table. Exceeding this differential voltage risks irreversible damage to the internal resistor array switches. The device supports terminal voltages from −VCC to +VCC, but the total span between RH/VH and RL/VL must remain within the 10 V ceiling specified for X9313W variants.

Does X9313WM-3T2 require an external pull-up resistor on the INC line?

No, the X9313WM-3T2 does not require an external pull-up on the INC line. Its INC input has CMOS-compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V) and leakage current within ±10 µA, allowing direct connection to microcontroller GPIO pins configured as push-pull outputs. Internal circuitry ensures reliable negative-edge detection without external biasing, simplifying board layout and reducing BOM count.

How is nonvolatile storage triggered on X9313WM-3T2, and what timing is required?

Nonvolatile storage on X9313WM-3T2 is triggered by a rising edge on CS while INC is held HIGH. The store cycle requires tWR = 10 ms to complete, during which the device enters standby mode. After this interval, the wiper position is retained indefinitely (100-year data retention). No additional clocking or command sequence is needed-only correct CS/INC timing per the Mode Selection table in the datasheet.

Can X9313WM-3T2 operate with VCC = 3.3 V, and what impact does this have on wiper resistance?

Yes, X9313WM-3T2 operates across VCC = 3 V to 5.5 V, including standard 3.3 V supplies. Wiper resistance (RW) is specified as 40 Ω typical at VCC = 5 V; at 3.3 V, RW increases slightly due to reduced MOSFET channel conduction but remains within 100 Ω maximum per datasheet limits. This ensures consistent performance in low-voltage embedded systems without compromising divider accuracy.

Is the X9313WM-3T2 pinout compatible with other X9313 variants in MSOP-8 packages?

Yes, the X9313WM-3T2 shares identical pinout and footprint with all X9313 variants offered in 8-lead MSOP packages (e.g., X9313UMIZ-3, X9313ZMIZ-3), as confirmed by Package Outline Drawing M8.118. Pin functions-VCC, VSS, CS, U/D, INC, RH/VH, RL/VL, RW/VW-are electrically and physically identical across these variants, enabling drop-in substitution where RTOTAL and temperature range align with system requirements.