Renesas X9317ZM8I-2.7T1

Overview

X9317ZM8I-2.7T1 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. Used for precision DC bias adjustment in industrial sensor signal conditioning circuits.

For engineers reviewing the X9317ZM8I-2.7T1 datasheet, X9317ZM8I-2.7T1 pinout, X9317ZM8I-2.7T1 application, or X9317ZM8I-2.7T1 equivalent, key selection criteria include its 3-wire up/down interface timing (tCYC = 2µs), ratiometric temperature coefficient (±20 ppm/°C), nonvolatile store latency (5–10ms), and MSOP-8 package compatibility with space-constrained analog trim designs.

Technical Context

The X9317ZM8I-2.7T1 integrates a 7-bit up/down counter, decoder, and solid-state wiper switching network controlling access to 100 discrete tap points across a 99-resistor linear array. Its control logic responds to negative-edge-triggered INC pulses while CS is low, with U/D determining increment/decrement direction.

Wiper position is retained in nonvolatile memory upon CS↑ with INC high, enabling automatic recall at power-up. The device operates as either a three-terminal voltage divider (RH–RW–RL) or two-terminal variable resistor (RW–RL or RW–RH), with make-before-break switching ensuring continuity during tap transitions.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Moisture Sensitivity Level 1, RoHS-compliant, JEDEC MO-187-AA compliant, body dimensions 3.0mm × 3.0mm × 0.95mm).

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 X9317ZM8I-2.7T1 uniquely delivers autonomous power-cycle calibration retention via integrated nonvolatile memory, eliminating dependency on host processor state management while maintaining identical 10kΩ resistance and 2.7V–5.5V supply compatibility.

Availability

X9317ZM8I-2.7T1 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, and voltage regulator output control requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for X9317ZM8I-2.7T1 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 family is designed for precision analog trimming in space- and power-constrained systems, emphasizing nonvolatile configuration retention, low-voltage operation, and robustness across extended temperature ranges.

FAQ

What is the guaranteed operating temperature range for the X9317ZM8I-2.7T1?

The X9317ZM8I-2.7T1 is rated for -40°C to +85°C industrial operation. This range is validated across all electrical specifications including end-to-end resistance tolerance, ratiometric temperature coefficient, and nonvolatile memory endurance. The "I" suffix in the part number explicitly denotes industrial-grade qualification per Renesas' ordering nomenclature.

Does the X9317ZM8I-2.7T1 require an external power-on reset circuit to prevent unintended wiper movement during startup?

No. The X9317ZM8I-2.7T1 incorporates internal power-on initialization that holds the wiper stable until VCC reaches regulation. Per datasheet Section "Power-up and Down Requirements", bringing CS and INC high before or concurrently with VCC prevents spurious taps. No external POR circuit is needed if this sequencing is observed in system design.

Can the X9317ZM8I-2.7T1 be used in a two-terminal configuration with RW and RL only, and what is the maximum allowable current through that path?

Yes, the X9317ZM8I-2.7T1 supports two-terminal operation between RW and RL. The absolute maximum wiper current is ±4.4mA per the Absolute Maximum Ratings table. At 2.7V supply, the wiper resistance is ≤1000Ω, limiting continuous current to ~2.7mA under worst-case voltage drop - well within safe operating limits for trimming functions.

How does the nonvolatile store function work on the X9317ZM8I-2.7T1, and what timing must be observed?

The X9317ZM8I-2.7T1 stores the current wiper position when CS transitions HIGH while INC is held HIGH. This store cycle takes 5–10ms (tWR), during which the device draws elevated current (~400µA). The datasheet specifies that INC must remain HIGH throughout tWR; releasing it early aborts the store. No external command or address is required - the action is purely edge- and level-triggered.

Is the X9317ZM8I-2.7T1 pin-compatible with other members of the X9317 family, such as the X9317WM8IZ-2.7T1?

Yes. All X9317 variants in MSOP-8 packaging - including X9317ZM8I-2.7T1 and X9317WM8IZ-2.7T1 - share identical pinout, footprint, and mechanical dimensions per package drawing M8.118. Differences are limited to marking, temperature grade labeling, and internal resistance value coding; electrical functionality and interface timing are fully aligned.