Renesas X9315WSIT1

Overview

X9315WSIT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It operates at 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports industrial temperature range (–40°C to +85°C) in an 8-lead SOIC package. It functions as a three-terminal voltage divider or two-terminal variable resistor for precision analog trimming in embedded control systems.

For engineers reviewing the X9315WSIT1 datasheet, X9315WSIT1 pinout, X9315WSIT1 application, or X9315WSIT1 equivalent, key selection considerations include its 10kΩ total resistance, 5µA standby current, 80µA active current, nonvolatile recall on power-up, and compatibility with low-voltage digital control buses in space-constrained industrial designs.

Technical Context

The X9315WSIT1 uses a 5-bit up/down counter driving a decoder that selects one of 32 wiper positions across a monolithic 31-resistor ladder. Wiper movement follows make-before-break switching, preventing open-circuit transients during tap transitions. Its nonvolatile memory stores the last wiper setting using EEPROM technology with 100,000 endurance cycles and 100-year data retention.

Control logic responds to CS (active-low chip select), U/D (direction), and edge-triggered INC inputs. A store operation occurs only when CS rises while INC is high; otherwise, wiper adjustments remain volatile until explicitly saved. The device requires no external clock and operates synchronously with INC edges.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (M8.15E), RoHS-compliant, surface-mountable with standard 1.27mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5241BRMZ10 and MCP41010-I/P, the X9315WSIT1 offers deterministic 32-tap resolution with guaranteed nonvolatile recall and minimal external component count-ideal for cost-sensitive, space-constrained industrial controls where predictable startup behavior is mandatory.

Availability

X9315WSIT1 is available at Aetrix Electronics and suitable for motor control, audio signal routing, power supply trimming, and sensor calibration applications requiring stable component supply and industrial temperature qualification.

Supply support for X9315WSIT1 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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9315 product line delivers solid-state digital potentiometers optimized for analog trimming in embedded systems where reliability, nonvolatile configuration, and low-power operation are critical design requirements.

FAQ

What is the total resistance value and tolerance of the X9315WSIT1?

The X9315WSIT1 has a nominal total resistance (R_TOTAL) of 10kΩ with a tolerance of ±20%. This value is specified across the full industrial temperature range (–40°C to +85°C) and applies to the end-to-end resistance between RH/VH and RL/VL terminals. The device uses a 31-element resistor ladder architecture, resulting in 32 discrete wiper positions.

Does the X9315WSIT1 retain its wiper position after power loss?

Yes, the X9315WSIT1 retains its wiper position after power loss using on-chip nonvolatile EEPROM memory. When CS rises while INC is held HIGH, the current wiper position is stored and automatically recalled at the next power-up. This feature ensures repeatable startup behavior without requiring host MCU intervention to reload settings.

What supply voltage range does the X9315WSIT1 support?

The X9315WSIT1 supports a supply voltage (V_CC) range of 2.7V to 5.5V. This dual-voltage capability allows direct integration with both 3.3V and 5V digital systems without level translation. The device draws only 80µA active current and 5µA standby current within this range, making it suitable for low-power industrial applications.

How many wiper positions does the X9315WSIT1 provide, and what is the resolution?

The X9315WSIT1 provides exactly 32 wiper positions, corresponding to a 5-bit counter driving a 31-resistor ladder. Resolution is defined by the minimum increment (MI) of R_TOTAL/31 ≈ 322Ω per step. Absolute linearity error is ±1 MI, and relative linearity error is ±0.2 MI, ensuring predictable analog adjustment across the full range.

What package type and lead count does the X9315WSIT1 use?

The X9315WSIT1 uses an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, drawing M8.15E), with 1.27mm lead pitch and RoHS-compliant matte tin plating. This surface-mount package measures 4.90mm × 3.90mm × 1.75mm max and is compatible with standard reflow soldering profiles, including Pb-free processes.