Renesas X9317UV8Z-2.7

Overview

X9317UV8Z-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 (±20% tolerance), low standby current (<5 µA), and 3-wire up/down serial interface. Used for precision DC bias adjustment in LCD bias control and laser diode bias circuits.

For engineers reviewing the X9317UV8Z-2.7 datasheet, X9317UV8Z-2.7 pinout, X9317UV8Z-2.7 application, or X9317UV8Z-2.7 equivalent, key selection criteria include its TSSOP-8 package, 50 kΩ total resistance, nonvolatile recall on power-up, ±300 ppm/°C total resistance temperature coefficient, and compatibility with low-voltage embedded trimming systems requiring long-term setting retention.

Technical Context

The X9317UV8Z-2.7 integrates a 7-bit up/down counter, decoder, and nonvolatile memory to control wiper position across 100 discrete taps of a 99-resistor ladder. Its "make-before-break" switching ensures glitch-free transitions during wiper movement, while the stored wiper value persists for 100 years at full temperature range.

It operates as either a three-terminal voltage divider (RH–RW–RL) or two-terminal variable resistor (RW–RL or RW–RH), with wiper resistance specified at 400–1000 Ω at 2.7 V and ratiometric temperature coefficient of ±20 ppm/°C - critical for stable gain/offset trim in analog signal chains.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP45HV51-503E/MS, the X9317UV8Z-2.7 uniquely balances ultra-low standby current (<5 µA), guaranteed nonvolatile recall without host intervention, and compact TSSOP-8 footprint - making it optimal for space-constrained, battery-sensitive, self-initializing analog trimming tasks.

Availability

X9317UV8Z-2.7 is available at Aetrix Electronics and suitable for LCD bias control, laser diode bias control, and voltage regulator output trim requiring stable component supply, long-term calibration retention, and RoHS-compliant packaging.

Supply support for X9317UV8Z-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 is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications with emphasis on reliability and longevity.

The X9317 family was designed specifically for solid-state replacement of mechanical potentiometers in precision analog trimming applications - prioritizing nonvolatile setting retention, low power, and robust temperature performance over high-speed digital interfaces.

FAQ

What is the maximum wiper current rating for X9317UV8Z-2.7 at 2.7 V supply?

The X9317UV8Z-2.7 supports a maximum wiper current (I_W) of ±4.4 mA across the full temperature range. At 2.7 V supply, wiper resistance ranges from 400 Ω to 1000 Ω, limiting practical continuous current to ~2.7 mA before exceeding power derating limits. This ensures safe operation in low-voltage bias networks without thermal runaway.

Does X9317UV8Z-2.7 require external pull-up resistors on its control pins?

No, X9317UV8Z-2.7 does not require external pull-up resistors. Its CS, U/D, and INC inputs have CMOS-compatible thresholds (V_IL ≤ 0.1×V_CC, V_IH ≥ 0.7×V_CC) and input leakage current of ±10 µA, allowing direct connection to microcontroller GPIOs. Internal weak pull-downs are not present, so host firmware must drive defined logic levels during initialization.

How is the wiper position stored and recalled in X9317UV8Z-2.7?

In X9317UV8Z-2.7, wiper position is stored in nonvolatile memory by asserting CS HIGH while INC is held HIGH - triggering a 5–10 ms store cycle. On subsequent power-up, the device automatically recalls the last stored value within 5 µs and sets RW to the corresponding tap. Data retention is rated for 100 years under full temperature range.

Can X9317UV8Z-2.7 operate as a two-terminal variable resistor in high-side current sensing?

Yes, X9317UV8Z-2.7 can configure RH–RW or RW–RL as a two-terminal variable resistor. For high-side current sensing, RW–RH placement allows current flow from supply through RH to RW, but note that wiper resistance (400–1000 Ω at 2.7 V) adds series impedance - best suited for low-current bias paths (<1 mA), not shunt-based high-current measurement.

What is the absolute maximum voltage rating on RH, RW, and RL terminals of X9317UV8Z-2.7?

The absolute maximum voltage on RH, RW, and RL terminals of X9317UV8Z-2.7 is +6 V with respect to VSS. Exceeding this risks permanent damage to the internal resistor array and wiper switches. Operation must remain within VSS ≤ V_terminal ≤ V_CC under normal conditions, with V_CC limited to 2.7–5.5 V per specification.