Renesas X9317WV8-2.7

Overview

X9317WV8-2.7 from Renesas Electronics is a digitally controlled potentiometer (XDCP™) with 100 wiper tap points, nonvolatile wiper position storage, and 2.7V to 5.5V supply operation. It implements a 99-element resistor array with temperature-compensated end-to-end resistance tolerance of ±20%, low standby current (<5 µA), and 10 kΩ total resistance - used for precision DC bias adjustment and voltage regulator output control in industrial instrumentation.

For engineers reviewing the X9317WV8-2.7 datasheet, X9317WV8-2.7 pinout, X9317WV8-2.7 application, or X9317WV8-2.7 equivalent, this page delivers verified specifications, TSSOP-8 package details, 3-wire up/down interface timing, wiper resistance (400–1000 Ω at 2.7 V), and real-world trim use cases including laser diode bias and LCD panel gamma correction.

Technical Context

The X9317WV8-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps on a 99-resistor ladder. Its "make-before-break" switching ensures glitch-free transitions during wiper movement, while ratiometric temperature coefficient (±20 ppm/°C) preserves voltage division accuracy under thermal drift.

Operation relies on three dedicated digital inputs: CS (chip select), U/D (direction control), and INC (negative-edge-triggered increment). Wiper position is stored to nonvolatile memory only when CS rises high while INC is high - enabling deterministic power-up recall without external EEPROM or firmware initialization.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (JEDEC MO-153, M8.173 drawing), RoHS-compliant, 3.0 mm × 4.4 mm footprint, 1.20 mm max height.

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 X9317WV8-2.7 uniquely combines 3-wire simplicity, guaranteed power-up recall, and low-voltage operation - making it optimal for self-contained analog trim functions where MCU intervention is undesirable or unavailable.

Availability

X9317WV8-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, and voltage regulator output control requiring stable component supply, long-term calibration retention, and RoHS-compliant TSSOP packaging.

Supply support for X9317WV8-2.7 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

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and infrastructure markets.

The X9317 family was designed specifically for solid-state replacement of mechanical potentiometers in precision analog trim applications - emphasizing nonvolatile retention, low power, and robust temperature performance in compact packages.

FAQ

What is the guaranteed power-up behavior of the X9317WV8-2.7?

The X9317WV8-2.7 automatically recalls the last stored wiper position from nonvolatile memory within 5 µs after VCC reaches regulation. This behavior is guaranteed across its full 0°C to +70°C commercial temperature range and requires no external initialization - ensuring repeatable analog settings at system startup without MCU involvement. The X9317WV8-2.7 achieves this using integrated EEPROM-like memory cells rated for 100 years of data retention.

Can the X9317WV8-2.7 operate reliably at 2.7 V supply?

Yes, the X9317WV8-2.7 is fully specified and tested for operation down to 2.7 V, with all key parameters - including wiper resistance (400–1000 Ω), standby current (<5 µA), and INC timing (tCYC ≤ 2 µs) - validated across the 2.7–5.5 V range. Its CMOS design ensures stable 3-wire interface functionality and accurate resistor ladder performance even at minimum VCC, making the X9317WV8-2.7 suitable for coin-cell or single Li-ion powered systems.

How does the X9317WV8-2.7 handle wiper movement during rapid successive INC pulses?

The X9317WV8-2.7 uses "make-before-break" switching during wiper transitions, meaning multiple taps connect briefly to RW during movement - preventing open-circuit conditions that could disrupt feedback loops. Each INC edge advances the wiper by exactly one tap, with tIW (INC to RW change) ≤ 5 µs. Rapid pulses are supported down to 2 µs cycle time (tCYC), but moving >10 taps consecutively may temporarily reduce effective RTOTAL due to parallel conduction paths - a known behavior documented in the X9317WV8-2.7 datasheet.

Is the X9317WV8-2.7 pin-compatible with other X9317 variants?

Yes, all X9317 variants - including X9317WV8-2.7 (TSSOP), X9317WM8-2.7 (MSOP), and X9317WS8-2.7 (SOIC) - share identical 8-pin functional mapping and electrical specifications. Pin 1 is INC, Pin 2 is U/D, Pin 3 is RH, Pin 4 is VSS, Pin 5 is RW, Pin 6 is RL, Pin 7 is CS, and Pin 8 is VCC across all packages. This allows direct PCB footprint substitution between packages when thermal or board-space constraints change - the X9317WV8-2.7 maintains full functional equivalence.

What is the maximum allowable voltage across RH and RL terminals of the X9317WV8-2.7?

The X9317WV8-2.7 specifies an absolute maximum RH/RL terminal voltage of +6 V with respect to VSS, independent of VCC. However, for reliable operation within datasheet limits, the voltage across RH–RL must not exceed the device's power rating: 10 mW for 10 kΩ RTOTAL. At 2.7 V supply, this corresponds to a maximum RH–RL differential of ~3.16 V (since P = V²/R → V = √(P×R)). Exceeding this risks localized heating and long-term drift - the X9317WV8-2.7 is intended for low-power trim, not high-voltage or high-current applications.