Renesas X9317TS8IZ

Overview

X9317TS8IZ from Renesas Electronics is a digitally controlled potentiometer (XDCP™) implementing a 99-element resistor array with 100 wiper tap positions, nonvolatile wiper position storage, and 3-wire up/down serial interface. It operates from 2.7V to 5.5V, delivers ±20% end-to-end resistance tolerance, and supports voltage divider or variable resistor configurations in precision analog trimming applications.

For engineers reviewing the X9317TS8IZ datasheet, X9317TS8IZ pinout, X9317TS8IZ application, or X9317TS8IZ equivalent, this device serves as a solid-state replacement for mechanical potentiometers requiring power-up recall, low standby current (<5 µA), and temperature-compensated linearity (±0.2 MI relative linearity) across -40°C to +85°C.

Technical Context

The X9317TS8IZ integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its "make-before-break" switching ensures continuity during wiper transitions, while the resistor array exhibits ±300 ppm/°C total resistance temperature coefficient and ±20 ppm/°C ratiometric coefficient.

Control is implemented via three dedicated digital inputs: CS (chip select), U/D (direction), and INC (edge-triggered increment). A store operation occurs on CS rising edge with INC high, writing the current wiper position to nonvolatile memory for automatic recall at next power-up.

Key Specifications

Pinout & Package

Package: 8-lead TSSOP (RoHS-compliant, JEDEC MO-153 AC, M8.173 drawing).

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 X9317TS8IZ uniquely combines 100-tap resolution, guaranteed power-up recall, and ultra-low standby current in a compact TSSOP package-making it optimal for self-contained, maintenance-free analog trimming where MCU resources or board space are constrained.

Availability

X9317TS8IZ is available at Aetrix Electronics and suitable for LCD bias control, laser diode biasing, voltage regulator output tuning, and precision DC offset trimming requiring stable component supply across industrial temperature ranges.

Supply support for X9317TS8IZ 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 enterprise applications.

The X9317 series belongs to Renesas' XDCP™ (Digitally Controlled Potentiometer) product line, engineered specifically for replacing mechanical trimmers in high-reliability analog systems requiring zero-maintenance calibration and long-term parameter retention.

FAQ

What is the maximum wiper current rating for the X9317TS8IZ?

The X9317TS8IZ supports a maximum wiper current of ±4.4 mA under all operating conditions. This limit applies regardless of wiper position or supply voltage (2.7 V to 5.5 V). Exceeding this value risks degradation of the internal switch network and may compromise long-term reliability. The wiper resistance varies from 200 Ω (typical at 5 V) to 1000 Ω (max at 2.7 V), so designers must verify current compliance using actual RH–RL voltage differential and selected tap position when sizing external drive sources for the X9317TS8IZ.

Does the X9317TS8IZ require external decoupling capacitors?

Yes, the X9317TS8IZ requires a 0.1 µF ceramic capacitor placed within 1 cm of the VCC and VSS pins. This decoupling stabilizes internal logic and analog reference paths during wiper transitions and prevents supply-induced errors in tap position accuracy. Without proper decoupling, the device may exhibit erratic wiper movement or fail to store positions reliably in nonvolatile memory. The capacitor must be rated for the full operating temperature range (−40°C to +85°C) and mounted directly adjacent to the X9317TS8IZ package to minimize inductance in the X9317TS8IZ power loop.

How does the X9317TS8IZ handle power-up sequencing?

The X9317TS8IZ requires VCC and VSS to be applied before any signals on CS, U/D, or INC. The device becomes fully operational 1 ms after VCC reaches its final value. To prevent unintended wiper movement or spurious store operations, CS and INC must be held high (or at valid logic levels) during power ramp-up. The recommended sequence is: apply VCC/VSS → wait ≥1 ms → assert CS low to initiate control. This ensures the X9317TS8IZ recalls its last stored wiper position correctly and avoids transient-induced errors in the X9317TS8IZ's internal counter state.

Can the X9317TS8IZ be used in a two-terminal variable resistor configuration?

Yes, the X9317TS8IZ supports two-terminal operation by connecting either RH or RL to RW and using the remaining fixed terminal with RW as the adjustable resistance element. In this mode, the effective resistance ranges from near-zero (wiper at same terminal) to RTOTAL (wiper at opposite end). Designers must observe the ±4.4 mA wiper current limit and avoid exceeding the 10 mW total power rating. This configuration is commonly used for gain-setting in op-amp circuits or current-limiting in LED drivers, where the X9317TS8IZ replaces mechanical rheostats with superior long-term stability and shock resistance.

What is the temperature coefficient behavior of the X9317TS8IZ's resistor array?

The X9317TS8IZ exhibits a total resistance temperature coefficient of ±300 ppm/°C and a tighter ratiometric temperature coefficient of ±20 ppm/°C. The ratiometric spec reflects how the voltage division ratio (VW/VH or VW/VL) changes with temperature - critical for applications like sensor biasing where absolute resistance drift is less important than proportional stability. This performance is achieved through on-chip temperature compensation of the resistor array and is validated across −40°C to +85°C. The X9317TS8IZ datasheet provides Figure 2 showing typical TC variation, confirming minimal deviation within the industrial temperature range for the X9317TS8IZ.