Renesas X9313WSI

Overview

X9313WSI 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 10 kΩ end-to-end resistance, industrial temperature range (–40°C to +85°C), and SOIC-8 packaging.

For engineers reviewing the X9313WSI datasheet, X9313WSI pinout, X9313WSI application, or X9313WSI equivalent, key selection criteria include its 3-wire control protocol, nonvolatile recall on power-up, ±10 V terminal voltage support (at V_CC = 5 V), 3 mA max active current, and compatibility with analog signal conditioning, DC bias adjustment, and programmable gain control.

Technical Context

The X9313WSI implements a 31-element resistor array with make-before-break wiper switching, decoded by a 5-bit up/down counter driven by CS, U/D, and edge-triggered INC inputs. Its nonvolatile memory stores wiper position upon CS↑ with INC HIGH, enabling deterministic power-on state restoration.

It operates as either a three-terminal potentiometer (RH/VH–RW/VW–RL/VL) or two-terminal variable resistor, with wiper resistance of 40 Ω (typ.) at V_CC = 5 V, absolute linearity error ≤ ±1 MI, and ratiometric temperature coefficient of ±20 ppm/°C - critical for stable voltage division across temperature.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9 mm × 4.9 mm body, 1.27 mm lead pitch per 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 AD5243BRMZ10 and MCP41010-I/P, the X9313WSI offers deterministic power-on behavior without firmware initialization, minimal GPIO count (3 wires), and guaranteed ±V_CC terminal operation - making it optimal for cost-sensitive, single-pot, industrial analog trimming where reliability and simplicity outweigh resolution demands.

Availability

X9313WSI is available at Aetrix Electronics and suitable for audio signal conditioning, DC bias adjustment, programmable power supply feedback, and laser diode current trimming requiring stable component supply and long-term calibration integrity.

Supply support for X9313WSI 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 X9313 product line delivers solid-state potentiometer functionality for analog trimming in harsh environments, emphasizing nonvolatile retention, wide voltage operation, and long-term parametric stability - targeting instrumentation, medical devices, and industrial control systems.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313WSI?

The X9313WSI supports a maximum differential voltage ΔV = |VH − VL| of 10 V under recommended operating conditions. This is specified for X9313W-series devices like the X9313WSI and remains valid across its full industrial temperature range (–40°C to +85°C). Exceeding this limit risks permanent damage to the internal resistor array or wiper switches.

Does X9313WSI retain its wiper position after power cycling?

Yes, the X9313WSI stores the wiper position in nonvolatile memory and automatically recalls it on power-up. This occurs only if the position was previously stored via a CS↑ transition while INC is HIGH - a dedicated store command. The device retains data for 100 years, ensuring calibration persistence in unattended equipment.

Can X9313WSI operate with a 3.3 V supply?

No, the X9313WSI is rated for V_CC = 4.5 V to 5.5 V only. It belongs to the standard-voltage X9313W family, not the -3 suffix variant (e.g., X9313WMIZ-3). Applying 3.3 V will result in undefined logic levels, unreliable wiper movement, and failure to meet timing specifications such as tCYC (2 µs minimum).

What is the wiper resistance specification for X9313WSI and why does it matter?

The X9313WSI has a typical wiper resistance of 40 Ω at V_CC = 5 V (max 100 Ω). This low on-resistance minimizes insertion error when used in op-amp feedback networks or precision voltage dividers. For example, in a 10 kΩ total resistance configuration, 40 Ω adds only 0.4% error - critical for maintaining gain accuracy in closed-loop systems.

Is X9313WSI pin-compatible with other X9313 variants in SOIC-8 package?

Yes, all X9313 variants in 8-lead SOIC (e.g., X9313USZ, X9313USIZ, X9313WSZ, X9313WSI) share identical pinout and footprint per M8.15 package drawing. However, electrical differences exist: X9313WSI is rated for –40°C to +85°C and 10 kΩ RTOTAL, whereas X9313USZ is commercial grade (0°C to +70°C) and also 10 kΩ - confirming direct physical replaceability within same temperature and resistance requirements.