Renesas X9313US

Overview

X9313US from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 32-tap linear resistor array with nonvolatile wiper position storage, 3-wire serial interface (CS/U/D/INC), ±VCC terminal voltage range, and 10 kΩ end-to-end resistance - used for precision analog trimming in voltage divider and variable resistor configurations within industrial control and signal conditioning circuits.

For engineers reviewing the X9313US datasheet, X9313US pinout, X9313US application, or X9313US equivalent, key selection considerations include its 3-wire interface timing (tIW = 5 µs, tCPH = 20 ms store), ±4.4 mA max wiper current, 3V–5.5V supply compatibility, SOIC-8 package, and nonvolatile recall on power-up.

Technical Context

The X9313US integrates a 31-element resistor ladder, 5-bit up/down counter, make-before-break wiper switching network, and EEPROM-based nonvolatile memory for wiper position retention. Its control logic responds to edge-triggered INC input with direction set by U/D while CS enables selection and initiates store-on-high transitions.

It operates as either a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) or two-terminal variable resistor, supporting terminal voltages from –VCC to +VCC and offering temperature-compensated linearity (±1 MI absolute, ±0.2 MI relative) with ±20% RTOTAL tolerance across 0°C to +70°C.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free), JEDEC MS-012-AA compliant, body size 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 AD5243BRMZ10 and MCP41010-I/P, the X9313US offers deterministic power-on behavior and minimal GPIO overhead via its 3-wire interface, making it optimal for space-constrained, single-pot applications where guaranteed startup state and low pin count are prioritized over multi-channel support or ultra-fine resolution.

Availability

X9313US is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplification, DC-DC converter trim, audio level control, and analog front-end parameter adjustment requiring stable component supply and guaranteed power-on wiper position.

Supply support for X9313US 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 provider, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9313US belongs to Intersil's XDCP™ (Digitally Controlled Potentiometer) family, engineered for replacing mechanical trimmers in applications demanding repeatable, nonvolatile, and solid-state analog adjustment.

FAQ

What is the supply voltage range supported by the X9313US?

The X9313US operates from 3V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This range is explicitly specified in the "Recommended Operating Conditions" section of the FN8177 datasheet. The device draws ≤3 mA active current and ≤500 µA standby current within this range, ensuring low-power operation across its full voltage window. The X9313US maintains full functionality-including wiper movement, storage, and recall-throughout this supply range.

Does the X9313US retain its wiper position after power loss?

Yes, the X9313US stores the wiper position in nonvolatile EEPROM memory and automatically recalls it upon power-up. This behavior is guaranteed for ≥100 years and survives ≥100,000 store cycles. The store operation occurs when CS transitions HIGH while INC is held HIGH. Once recalled, the wiper settles to the stored tap position within 10 µs (tPU), ensuring deterministic startup in systems like sensor transmitters or regulated power supplies where initial output stability is critical. The X9313US does not require host intervention to restore its last-known state.

What package type is used for the X9313US?

The X9313US is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, Pb-free and RoHS-compliant, with JEDEC MS-012-AA outline (drawing M8.15). Its dimensions are 4.9 mm × 3.9 mm × 1.75 mm, and it features gull-wing leads with 1.27 mm pitch. This package is compatible with standard surface-mount reflow processes and is distinct from the MSOP or PDIP variants offered in the broader X9313 family. The X9313US marking is "X9313U ZD", as confirmed in the Ordering Information table on page 2 of FN8177 Rev 7.00.

Can the X9313US be used with negative voltages on its terminals?

Yes, the X9313US supports terminal voltages from –VCC to +VCC on RH/VH, RL/VL, and RW/VW pins, enabling true bipolar operation when VCC is referenced to a split supply or ground. For example, with VCC = 5V and VSS = 0V, terminals may swing from –5V to +5V. This capability is explicitly stated in the "Potentiometer Characteristics" table (page 5) and allows use in AC-coupled signal paths, dual-supply op-amp interfaces, and industrial transducer conditioning where signal offsets exceed unipolar rails. The X9313US maintains specified linearity and wiper resistance within this extended range.

How does the 3-wire interface of the X9313US differ from I²C or SPI protocols?

The X9313US uses a proprietary 3-wire interface (CS, U/D, INC) that is asynchronous, edge-triggered, and requires no clock or data lines beyond those three. Unlike I²C or SPI, it has no address byte, no bidirectional data transfer, and no protocol overhead - each INC falling edge moves the wiper one tap in the direction set by U/D. This simplifies firmware implementation and reduces MCU resource usage. The X9313US also supports immediate nonvolatile store via CS/INC coordination, a feature absent in most serial digital potentiometers. Its timing parameters (e.g., tIW = 5 µs, tCPH = 20 ms) are optimized for direct GPIO control rather than bus arbitration.