Renesas X9317ZS8IZ

Overview

X9317ZS8IZ 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 as a three-terminal voltage divider or two-terminal variable resistor for precision analog trimming in DC bias, gain/offset, and laser diode control circuits.

For engineers reviewing the X9317ZS8IZ datasheet, X9317ZS8IZ pinout, X9317ZS8IZ application, or X9317ZS8IZ equivalent, this device supports stable wiper recall after power-up, ±20% end-to-end resistance tolerance, low 5 µA standby current, and operation across –40°C to +85°C industrial temperature range.

Technical Context

The X9317ZS8IZ integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps. Its resistor array uses temperature-compensated elements with ±300 ppm/°C total resistance TC and ±20 ppm/°C ratiometric TC.

Wiper movement follows make-before-break switching, enabling glitch-free transitions; the RW terminal exhibits 200 Ω typical wiper resistance at 5 V and 400 Ω at 2.7 V. Control logic responds to negative-edge-triggered INC pulses while CS is low, with store-on-CS-high-and-INC-high behavior for nonvolatile write.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (RoHS-compliant, M8.15E footprint, -40°C to +85°C industrial grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ10 and MCP41010-I/P, the X9317ZS8IZ offers deterministic power-up behavior without host intervention, minimal interface wiring (3 wires vs. 4+), and proven industrial temperature reliability-making it optimal for standalone analog trimming where simplicity and robustness outweigh channel count or resolution needs.

Availability

X9317ZS8IZ is available at Aetrix Electronics and suitable for LCD bias control, DC bias adjustment, and laser diode bias control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9317ZS8IZ 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 trimming applications requiring nonvolatile setting retention and industrial-grade reliability.

FAQ

What is the guaranteed wiper position resolution of the X9317ZS8IZ?

The X9317ZS8IZ provides exactly 100 discrete wiper tap positions across its 99-resistor-element array, yielding 1% resolution (1/99 ≈ 1.01%) for analog voltage or current adjustment. This resolution is fixed and guaranteed across the full –40°C to +85°C operating range, with no interpolation or software enhancement required. The X9317ZS8IZ achieves this via hardwired decoder logic tied directly to the 7-bit counter output.

Does the X9317ZS8IZ require an external microcontroller to retain wiper settings after power loss?

No, the X9317ZS8IZ stores wiper position in on-chip nonvolatile memory and automatically recalls it on power-up without any external controller. A store operation is triggered by raising CS to HIGH while INC is held HIGH; the recalled value is applied to RW within 5 µs of VCC stabilization. This autonomous behavior makes the X9317ZS8IZ ideal for systems lacking persistent firmware or real-time clocks.

Can the X9317ZS8IZ operate from a 3.3 V supply?

Yes, the X9317ZS8IZ supports 2.7 V to 5.5 V supply operation, fully covering standard 3.3 V rails. At 3.3 V, all specifications-including 100-tap functionality, 5 µA standby current, and nonvolatile store timing-are maintained per the datasheet. Input thresholds (VIH = 0.7 × VCC, VIL = 0.1 × VCC) scale accordingly, ensuring compatibility with 3.3 V logic families.

What is the maximum continuous current the X9317ZS8IZ wiper can handle?

The X9317ZS8IZ wiper (RW) is rated for ±4.4 mA continuous current under normal operation, verified across the full temperature range. Exceeding this may cause localized heating, resistance drift, or accelerated wear. For current-sensing applications, the device's 200 Ω typical wiper resistance at 5 V implies ≤0.9 V drop at rated current-designers must ensure RH–RL voltage remains within absolute max ratings (–1 V to +7 V referenced to VSS).

How does the X9317ZS8IZ prevent unintended wiper movement during power-up?

The X9317ZS8IZ requires CS and INC to be held HIGH before or concurrently with VCC ramp-up to suppress spurious wiper shifts. Its internal power-on reset circuit holds the control logic inactive until VCC stabilizes, and the 1 ms delay before full parameter compliance prevents misreads of floating inputs. This sequence-asserting CS/INC high prior to VCC-ensures the X9317ZS8IZ powers up silently to its last-stored position without glitch or drift.