Renesas X9317TPI

Overview

X9317TPI from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 discrete wiper tap positions. It features nonvolatile memory for power-up recall, 3-wire up/down serial interface (CS/U/D/INC), and operates from 2.7V to 5.5V supply. Used as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications including LCD bias control and laser diode bias adjustment.

For engineers reviewing the X9317TPI datasheet, X9317TPI pinout, X9317TPI application, or X9317TPI equivalent, key selection considerations include end-to-end resistance tolerance (±20%), wiper resistance (200Ω typ. at 5V), standby current (<5µA), absolute linearity (±1 MI), and RoHS-compliant TSSOP-8 packaging with -40°C to +85°C industrial temperature range.

Technical Context

The X9317TPI integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 taps. Its "make-before-break" switching ensures continuity during wiper transitions, while temperature-compensated resistor elements deliver ±300 ppm/°C total resistance drift and ±20 ppm/°C ratiometric stability.

Control logic responds to negative-edge-triggered INC pulses under active CS low, with U/D determining direction. A store operation occurs only when CS rises while INC is high, writing the current wiper position to EEPROM for retention over 100 years and 100,000 write cycles.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing), body size 4.4mm × 3.0mm × 1.2mm max, lead pitch 0.65mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41HV51-103, the X9317TPI offers optimal balance of 100-tap resolution, ±1 MI linearity, and simple 3-wire up/down interface-enabling direct GPIO control without protocol overhead or external level shifters.

Availability

X9317TPI is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, voltage regulator output control, and DC offset trimming requiring stable component supply across industrial temperature ranges and long-term production continuity.

Supply support for X9317TPI 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 Corporation is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.

The X9317TPI belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, engineered specifically for replacing mechanical potentiometers in precision analog trimming where reliability, nonvolatility, and temperature stability are critical.

FAQ

What is the supply voltage range supported by the X9317TPI?

The X9317TPI operates from 2.7V to 5.5V, covering both standard 3.3V and 5V system rails. This wide range eliminates the need for external voltage regulation when interfacing with mixed-supply designs. The device maintains full functionality-including wiper positioning, nonvolatile store, and linearity specifications-across this entire range, as confirmed in the Absolute Maximum Ratings and Potentiometer Specifications sections of the FN8183 Rev.10.01 datasheet. The X9317TPI also supports 5V ±10% operation, ensuring robustness against rail fluctuations.

Does the X9317TPI retain its wiper position after power loss?

Yes, the X9317TPI stores the last wiper position in nonvolatile EEPROM memory and automatically recalls it on power-up. This feature is intrinsic to the device architecture and requires no external components or host intervention. The datasheet specifies 100-year data retention and 100,000 write cycles, making it suitable for applications requiring factory calibration persistence across decades of field use. The X9317TPI performs automatic recall within 5µs after VCC stabilizes, as documented in the Power-up and Down Requirements section.

What package type and footprint does the X9317TPI use?

The X9317TPI is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package) compliant with JEDEC MO-153 AC and Renesas package drawing M8.173. Its dimensions are 4.4mm × 3.0mm × 1.2mm max, with 0.65mm lead pitch and gull-wing leads. The package is RoHS-compliant and rated for -40°C to +85°C operation. Land pattern recommendations and mechanical drawings are provided in the datasheet's Package Outline Drawings section, ensuring reliable reflow soldering and mechanical fit in space-constrained PCB layouts.

How many wiper tap positions does the X9317TPI provide, and what is its resolution?

The X9317TPI provides exactly 100 discrete wiper tap positions, corresponding to a resolution of 1% per step across the full resistor array. This is achieved via a 99-element series resistor ladder with taps at each node and both ends. The Minimum Increment (MI) is defined as [V(RH)−V(RL)]/99, and absolute linearity is specified at ±1 MI, meaning actual wiper voltage deviates by no more than ±1% from ideal across all 100 positions. This resolution and linearity are validated across the full industrial temperature range per the datasheet's Potentiometer Specifications table.

Can the X9317TPI be used as both a three-terminal potentiometer and a two-terminal variable resistor?

Yes, the X9317TPI supports both configurations. As a three-terminal potentiometer, RH and RL serve as fixed endpoints while RW acts as the movable wiper-ideal for voltage division (e.g., LCD VCOM bias). As a two-terminal variable resistor, either RH–RW or RL–RW is used, with the unused terminal left unconnected-common in current-setting applications like laser diode bias. The datasheet explicitly confirms this dual-mode capability in the first paragraph of the Applications section and illustrates both configurations in Figures 3 and 4. No internal reconfiguration is needed; usage mode is determined solely by external circuit connection.