Renesas X9317ZS8IZ-2.7

Overview

X9317ZS8IZ-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%, wiper resistance ≤400Ω at 2.7V, and standby current <5µA. It serves as a three-terminal voltage divider or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9317ZS8IZ-2.7 datasheet, X9317ZS8IZ-2.7 pinout, X9317ZS8IZ-2.7 application, or X9317ZS8IZ-2.7 equivalent, key selection criteria include its 2.7V minimum VCC support, MSOP-8 package, -40°C to +85°C industrial temperature range, and 10kΩ end-to-end resistance with ratiometric temperature coefficient of ±20ppm/°C.

Technical Context

The X9317ZS8IZ-2.7 uses a 7-bit up/down counter decoded to select one of 100 wiper positions across a 99-resistor ladder. Its control logic operates via a 3-wire serial interface (CS, U/D, INC), where CS enables selection, U/D sets direction, and negative-edge-triggered INC steps the wiper.

Wiper position is stored in nonvolatile memory when CS transitions high while INC is high, enabling automatic recall on power-up. The device employs "make-before-break" switching during wiper movement and maintains wiper position within physical bounds-no wraparound occurs at extremes.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (RoHS-compliant, JEDEC MO-187-AA compliant, M8.118 drawing), dimensions 3.0mm × 3.0mm × 1.10mm max height, thermal resistance θ_JA = 145°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP41HV51-103E/SN, the X9317ZS8IZ-2.7 uniquely combines 100-tap resolution, 10kΩ RTOTAL, ≤400Ω wiper resistance at 2.7V, and guaranteed nonvolatile recall - making it optimal for low-voltage, high-accuracy analog trimming where autonomous power-up behavior is mandatory.

Availability

X9317ZS8IZ-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias adjustment, and voltage regulator output trimming requiring stable component supply across industrial temperature ranges and long-lifecycle deployments.

Supply support for X9317ZS8IZ-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 Corporation is a global semiconductor manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog mixed-signal devices, and power management ICs for industrial, automotive, and infrastructure markets.

The X9317 family was designed specifically for solid-state replacement of mechanical potentiometers in precision analog trimming applications-emphasizing nonvolatile retention, low-voltage operation, and temperature-stable ratiometric performance.

FAQ

What is the operating temperature range for the X9317ZS8IZ-2.7?

The X9317ZS8IZ-2.7 is rated for operation from -40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the Ordering Information table on page 2 of the FN8183 Rev.10.01 datasheet, where the "IZ" suffix explicitly denotes the industrial temperature grade. The device maintains full specification compliance-including wiper position accuracy, nonvolatile write endurance, and ratiometric temperature coefficient-across this entire span.

Does the X9317ZS8IZ-2.7 require external components to function as a digital potentiometer?

No, the X9317ZS8IZ-2.7 operates autonomously with only VCC, VSS, and the three control signals (CS, U/D, INC). It contains an integrated 99-element resistor array, wiper switching network, 7-bit up/down counter, and nonvolatile memory-all on-die. No external capacitors, resistors, or EEPROM are needed for basic wiper positioning or power-up recall, simplifying BOM and layout versus alternatives requiring external memory or interface translation.

How does the X9317ZS8IZ-2.7 handle power-up sequencing?

The X9317ZS8IZ-2.7 recalls its last-stored wiper position within 5µs after VCC stabilizes, provided CS and INC are held high during power-up to prevent unintended movement or store operations. The datasheet specifies a recommended ramp rate of 0.2–50 V/ms for VCC and mandates that CS and INC be brought high before or concurrently with VCC to ensure deterministic startup behavior-no external reset circuitry is required.

Can the X9317ZS8IZ-2.7 be used in a two-terminal variable resistor configuration?

Yes, the X9317ZS8IZ-2.7 supports two-terminal operation by connecting either RH or RL to RW externally and using the remaining fixed terminal with RW as the variable resistance element. This configuration is explicitly validated in Figure 4 ("Two Terminal Variable Resistor") and Applications Information section of the datasheet, and is commonly deployed for current-setting in LED or laser diode bias circuits where low wiper resistance (<400Ω at 2.7V) minimizes voltage error.

What is the maximum wiper current rating for the X9317ZS8IZ-2.7 at 2.7V supply?

At 2.7V supply, the X9317ZS8IZ-2.7 supports a maximum wiper current (IW) of ±4.4mA, as specified in the Potentiometer Specifications table on page 4. This limit applies regardless of wiper position and ensures safe operation within the device's 10mW total power rating for 10kΩ RTOTAL. Exceeding this current risks irreversible degradation of the wiper switch elements.