Renesas X9313US-3

Overview

X9313US-3 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, offering 50 kΩ end-to-end resistance, 3 V to 5.5 V supply operation, and industrial temperature range (–40°C to +85°C) in an 8-lead SOIC package.

For engineers reviewing the X9313US-3 datasheet, X9313US-3 pinout, X9313US-3 application, or X9313US-3 equivalent, this device supports stable analog parameter adjustment in embedded control loops, sensor signal conditioning, and programmable gain stages where power-up repeatability and low standby current (500 µA max) are critical design requirements.

Technical Context

The X9313US-3 implements a resistor ladder of 31 precision elements with electronically switched wiper access via a 5-bit up/down counter and decode logic. Its control architecture uses edge-triggered INC input with U/D direction select and CS-gated store/recall to nonvolatile memory - enabling deterministic wiper positioning without host microcontroller intervention during power cycling.

Terminal voltage tolerance of ±V_CC allows bidirectional signal swing across RH/VH and RL/VL, while "make-before-break" switching ensures glitch-free transitions between taps. The device operates in two primary modes: real-time wiper adjustment (CS low) and nonvolatile store (CS rising edge with INC high), with t_CPH = 20 ms required for reliable memory write completion.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free), JEDEC MS-012-AA compliant, body dimensions 4.9 mm × 3.9 mm × 1.75 mm.

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 X9313US-3 offers unique advantages in systems requiring guaranteed power-up repeatability without firmware overhead, bipolar signal compatibility, and minimal GPIO usage - making it optimal for cost-sensitive, single-pot industrial analog interfaces.

Availability

X9313US-3 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio signal conditioning requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9313US-3 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 analog trimming applications demanding nonvolatile setting retention, low power consumption, and robust operation across extended temperature ranges.

FAQ

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

The X9313US-3 supports a maximum differential voltage of 10 V across RH/VH and RL/VL terminals, as specified for the X9313U variant group. This limit ensures safe operation of the internal resistor array and switching network under all conditions, including transient events. Exceeding 10 V may cause irreversible damage to the device. Always verify terminal voltage compliance in your specific circuit configuration before deployment.

Does X9313US-3 require external pull-up resistors on its control pins?

No, the X9313US-3 does not require external pull-up resistors on CS, U/D, or INC inputs. These pins have CMOS-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2 V) and exhibit ±10 µA leakage current, allowing direct interfacing with standard MCU GPIOs. However, floating inputs must be avoided - tie unused control lines to V_SS or V_CC to prevent unintended wiper movement or store operations.

How long does it take for X9313US-3 to recall its stored wiper position after power-up?

The X9313US-3 recalls its stored wiper position within 10 µs after V_CC reaches its final value, as specified by t_PU (power-up to wiper stable). This rapid restoration occurs automatically without host intervention and ensures immediate analog functionality upon system startup. No additional timing delay or initialization sequence is required beyond meeting the V_CC ramp rate specification (0.2–50 V/ms).

Can X9313US-3 be used in a two-terminal variable resistor configuration?

Yes, the X9313US-3 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 with the wiper. This configuration maintains full 32-tap resolution and nonvolatile storage capability. Ensure current through the device remains within ±4.4 mA limits and power dissipation stays below 10 mW for R_TOTAL ≥ 10 kΩ to avoid thermal derating.

What is the wiper resistance specification for X9313US-3 at 3.3 V supply?

The X9313US-3 wiper resistance (R_W) is specified as 40 Ω typical and 100 Ω maximum at V_CC = 5 V. While not explicitly tested at 3.3 V, the datasheet confirms operation down to 3 V, and measured performance shows R_W remains ≤100 Ω across the full 3–5.5 V range. This low on-resistance ensures minimal insertion error in precision voltage divider and gain-setting applications.