Renesas X9313ZS-3T1

Overview

X9313ZS-3T1 from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 3-wire serial interface (CS/U/D/INC), nonvolatile wiper position storage, and 1kΩ end-to-end resistance. It operates from 3V to 5.5V, supports terminal voltages from –VCC to +VCC, and functions as either a three-terminal potentiometer or two-terminal variable resistor in precision analog trimming applications.

For engineers reviewing the X9313ZS-3T1 datasheet, X9313ZS-3T1 pinout, X9313ZS-3T1 application, or X9313ZS-3T1 equivalent, this device delivers deterministic wiper positioning, power-up recall of stored settings, ±20% RTOTAL tolerance, temperature-compensated linearity, and low-power CMOS operation suitable for embedded calibration, sensor offset adjustment, and programmable gain control circuits.

Technical Context

The X9313ZS-3T1 implements a 31-element resistor array with make-before-break wiper switching, driven by a 5-bit up/down counter decoded to select one of 32 tap points. Wiper position is stored in nonvolatile memory on CS↑ with INC HIGH, enabling reliable power-up restoration without external EEPROM.

Its 3-wire interface uses asynchronous edge-triggered logic: INC toggles wiper position on negative edge, U/D sets direction, and CS enables selection and initiates store operations. The device maintains wiper state during standby with ≤500µA current and exhibits ±0.2 MI relative linearity and ±1 MI absolute linearity over temperature.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9mm × 4.9mm body, 1.27mm pitch.

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 X9313ZS-3T1 offers unique advantages in low-pin-count 3-wire control, guaranteed power-up recall, bipolar voltage handling, and compact SOIC-8 footprint - making it optimal for space-constrained, self-contained analog trimming where reliability and simplicity are prioritized over resolution or multi-channel density.

Availability

X9313ZS-3T1 is available at Aetrix Electronics and suitable for audio signal conditioning, sensor calibration, programmable power supplies, and industrial DAC scaling requiring stable component supply and long-term parameter retention.

Supply support for X9313ZS-3T1 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

Intersil Corporation is a leading provider of precision analog and power management ICs, serving industrial, infrastructure, and high-end consumer markets with high-reliability, application-optimized solutions.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in embedded systems requiring nonvolatile trim, low power, and robust operation across extended temperature ranges.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313ZS-3T1?

The X9313ZS-3T1 specifies ΔV = |VH − VL| ≤ 4V for the Z-series variant. This limit applies regardless of VCC level and is enforced to prevent resistor array degradation. Exceeding 4V risks permanent damage to the 1kΩ element structure and invalidates the ±20% RTOTAL tolerance guarantee. Always ensure external circuitry clamps differential voltage within this bound.

Does X9313ZS-3T1 require an external pull-up or pull-down resistor on the INC pin?

No, the X9313ZS-3T1 does not require external biasing on the INC pin. Its input leakage current is ±10µA over temperature, and VIH/VIL thresholds are defined relative to VCC and VSS. Driving INC directly from a CMOS GPIO (with rail-to-rail swing) meets all timing and voltage requirements specified in the datasheet, including tIL ≥1µs and tIH ≥1µs minimum pulse widths.

Can X9313ZS-3T1 be used in a true bipolar signal path where VH is at +2.5V and VL is at –2.5V?

Yes, the X9313ZS-3T1 supports terminal voltages from –VCC to +VCC. With VCC = 5V, VH and VL may be biased at +2.5V and –2.5V respectively, satisfying the –VCC to +VCC specification. However, the absolute differential voltage must remain ≤4V, and VW output will swing between those rails. Ensure downstream circuitry references the same ground and tolerates the resulting wiper voltage range.

How many wiper position changes can X9313ZS-3T1 endure before failure?

The X9313ZS-3T1 is rated for 100,000 data changes per bit in its nonvolatile memory. This endurance figure applies to store operations (CS↑ with INC HIGH), not incremental INC toggles. Each store writes the current 5-bit wiper value to EEPROM. Field life exceeds 10 years even with daily recalibration, assuming ≤27 store cycles per day - well within the 100k-cycle rating.

Is the wiper resistance of X9313ZS-3T1 constant across all tap positions?

No, the wiper resistance of X9313ZS-3T1 varies slightly with position due to internal switch geometry and routing, but remains bounded: 40Ω typical and ≤100Ω maximum at VCC = 5V. This variation is included in the ±1 MI absolute linearity spec and does not affect monotonicity. For precision applications, treat RW as a fixed series impedance added to the selected segment resistance.