Renesas X9313ZSIT1

Overview

X9313ZSIT1 from Intersil is a digitally controlled potentiometer (XDCP™) with linear taper, 32-tap resolution, 3-wire serial interface, ±VCC terminal voltage capability, and 1kΩ end-to-end resistance. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits requiring nonvolatile wiper position storage and recall at power-up.

For engineers reviewing the X9313ZSIT1 datasheet, X9313ZSIT1 pinout, X9313ZSIT1 application, or X9313ZSIT1 equivalent, key selection criteria include its 1kΩ RTOTAL tolerance (±20%), -40°C to +85°C industrial temperature range, SOIC-8 package, 3-wire up/down control architecture, and guaranteed 100-year data retention in nonvolatile memory.

Technical Context

The X9313ZSIT1 implements a 31-element resistor array with electronically switched wiper taps controlled by an internal 5-bit up/down counter. Wiper position is set via CS, U/D, and edge-triggered INC inputs, and stored into nonvolatile memory only when CS transitions HIGH while INC is HIGH.

It operates as either a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) or two-terminal variable resistor, with wiper resistance of 40Ω (typ.) at VCC = 5V, terminal voltage range of –VCC to +VCC, and absolute linearity error limited to ±1 MI (minimum increment = RTOTAL/31).

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9mm × 4.9mm body, 1.27mm pitch, M8.15 outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41010-I/P, the X9313ZSIT1 uniquely combines 1kΩ low-RTOTAL, ±VCC terminal support, and true nonvolatile storage in a minimal 3-wire interface - making it optimal for industrial analog trimming where power-loss resilience and bipolar compatibility are mandatory.

Availability

X9313ZSIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument gain trimming, audio level control, and laser diode biasing requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9313ZSIT1 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 deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed specifically for robust, maintenance-free analog parameter adjustment in harsh environments - emphasizing nonvolatile storage, wide voltage tolerance, and long-term data integrity over raw resolution or speed.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL for X9313ZSIT1?

The maximum voltage difference (ΔV = |VH − VL|) for the X9313ZSIT1 is 4V, as specified in the Absolute Maximum Ratings table. This limit applies regardless of VCC level and must be observed to prevent damage to the internal resistor array or switching network. Exceeding 4V risks irreversible degradation of wiper contact reliability and long-term resistance stability.

Does X9313ZSIT1 support true bipolar operation with negative supply rails?

Yes, X9313ZSIT1 supports true bipolar operation: its RH/VH and RL/VL terminals tolerate voltages from –VCC to +VCC, and VSS must be connected to the system ground reference. When VCC = 5V, terminals accept –5V to +5V, enabling direct integration into ±5V op-amp circuits without external level-shifting components - a key differentiator from most digital potentiometers.

How is nonvolatile storage triggered on X9313ZSIT1, and what happens if CS goes HIGH while INC is LOW?

Nonvolatile storage on X9313ZSIT1 occurs only when CS transitions from LOW to HIGH while INC is held HIGH. If CS rises while INC is LOW, the wiper position is not saved to memory and reverts to the last stored value upon next power-up. This behavior allows temporary runtime adjustments without overwriting factory calibration - a deliberate design feature for field-serviceable instruments.

What is the wiper resistance specification for X9313ZSIT1, and how does it affect circuit accuracy?

X9313ZSIT1 specifies wiper resistance as 40Ω (typical) at VCC = 5V, with a maximum of 100Ω. In precision gain-setting applications (e.g., op-amp feedback), this series resistance introduces a small but measurable error - for example, in a 10kΩ RTOTAL configuration, it adds ~0.4% gain uncertainty. Layout best practices recommend placing the wiper close to the driven node to minimize parasitic impact.

Can X9313ZSIT1 be used in place of a mechanical potentiometer without circuit redesign?

Yes, X9313ZSIT1 is a direct functional replacement for 1kΩ mechanical potentiometers in three-terminal or two-terminal configurations. Its pin-compatible SOIC-8 footprint matches standard layout footprints, and its ±VCC terminal rating, make-before-break switching, and 40Ω wiper resistance closely emulate mechanical behavior - enabling drop-in substitution in most analog trimming circuits without schematic or layout changes.