Renesas X9315WSZT1

Overview

X9315WSZT1 from Intersil is a digitally controlled potentiometer (XDCP™) implementing a 31-element resistor array with 32 discrete wiper tap positions, nonvolatile wiper position storage, and 3-wire serial interface (CS/U/D/INC). It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications requiring stable resistance values across temperature, such as sensor calibration and power supply feedback networks.

For engineers reviewing the X9315WSZT1 datasheet, X9315WSZT1 pinout, X9315WSZT1 application, or X9315WSZT1 equivalent, this device supports 0–5 V terminal voltage range, ±20% end-to-end resistance tolerance, low 5 µA standby current, 10 kΩ total resistance, and Pb-free SOIC-8 packaging compliant with RoHS and IPC/JEDEC reflow standards.

Technical Context

The X9315WSZT1 integrates a 5-bit up/down counter, nonvolatile EEPROM memory for wiper position retention, and a decoder-driven switching network that selects one of 32 tap points across a monolithic resistor array. Its "make-before-break" wiper switching prevents open-circuit transients during position changes.

Operation relies on three digital control lines: CS enables the device, U/D sets increment/decrement direction, and negative-edge-triggered INC steps the wiper. A store-to-memory command executes when CS transitions HIGH while INC is HIGH, initiating a 5–10 ms EEPROM write cycle.

Key Specifications

Pinout & Package

Package: 8-lead narrow-body SOIC (Pb-free), JEDEC MS-012-AA compliant, M8.15 drawing, 1.27 mm pitch, body size 4.90 × 3.90 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-10 and MCP41010-I/P, the X9315WSZT1 delivers guaranteed power-up restoration without host intervention, simpler 3-wire control, and lower standby current-making it optimal for unattended or battery-powered trimming where reliability and autonomy are critical.

Availability

X9315WSZT1 is available at Aetrix Electronics and suitable for sensor calibration, power supply feedback trimming, and audio signal level control requiring stable component supply and long-term parameter retention.

Supply support for X9315WSZT1 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) designs high-performance analog and mixed-signal ICs for power management, precision analog, and interface applications.

The X9315 product line delivers digitally controlled potentiometers optimized for analog trimming tasks where mechanical reliability, nonvolatile setting retention, and low-power operation are essential-targeting industrial instrumentation, medical devices, and telecom infrastructure.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9315WSZT1?

The absolute maximum voltage difference |V_H – V_L| is 5 V. Additionally, both RH/VH and RL/VL voltages must remain within 0 V to V_CC, and V_CC must always be ≥ VH, VL, and VW. Exceeding these limits risks permanent damage to the internal resistor array or switches. The X9315WSZT1 is rated for 4.5–5.5 V V_CC, so the safe terminal voltage window is strictly bounded by the supply rail.

Does X9315WSZT1 retain its wiper position after power cycling?

Yes, the X9315WSZT1 stores the wiper position in nonvolatile EEPROM memory. Upon power-up, the device automatically recalls the last stored value and configures the wiper accordingly. This behavior requires no host intervention and remains functional for up to 100 years under normal conditions, with 100,000 guaranteed write cycles per bit.

Can X9315WSZT1 operate from a 3.3 V supply?

No, the X9315WSZT1 is specified only for 4.5–5.5 V operation (5 V ±10%). It is not compatible with 3.3 V systems. For 2.7–5.5 V operation, Intersil offers the X9315WS-2.7T1 variant-but that part has different marking, temperature range, and ordering code. Using X9315WSZT1 below 4.5 V may result in unreliable wiper movement or failure to store positions.

What is the wiper resistance specification for X9315WSZT1 at 5 V supply?

The wiper resistance (R_W) for X9315WSZT1 is 200 Ω typical and 400 Ω maximum at V_CC = 5 V. This series resistance affects voltage division accuracy and must be accounted for in precision applications-especially near the RH/VH or RL/VL extremes where R_W contributes proportionally more to total path resistance.

Is X9315WSZT1 pin-compatible with other members of the X9315 family?

Yes, all X9315 variants-including X9315WSZT1-share identical 8-pin SOIC pinout and electrical interface. Differences lie solely in R_TOTAL value (10 kΩ, 50 kΩ, or 100 kΩ), temperature grade (0–70°C vs. −40–85°C), supply voltage range (5 V vs. 2.7–5.5 V), and packaging (Pb-free vs. SnPb). Pin-for-pin compatibility enables drop-in substitution where electrical specs align.