Renesas X9313UMZ-3T1

Overview

X9313UMZ-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 50 kΩ end-to-end resistance. It operates from 3V to 5.5V, supports ±VCC terminal voltages, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog trimming applications.

For engineers reviewing the X9313UMZ-3T1 datasheet, X9313UMZ-3T1 pinout, X9313UMZ-3T1 application, or X9313UMZ-3T1 equivalent, key selection criteria include its 3-wire control protocol, 100,000-cycle endurance, 100-year data retention, MSOP-8 package compatibility, and ±20% RTOTAL tolerance under temperature compensation.

Technical Context

The X9313UMZ-3T1 implements a 31-element resistor array with make-before-break wiper switching, decoded by a 5-bit up/down counter driven by CS, U/D, and edge-triggered INC inputs. Wiper position is stored in nonvolatile memory only when CS transitions HIGH while INC is HIGH - enabling deterministic power-up recall without unintended writes.

Its CMOS architecture delivers low active current (≤3 mA) and standby current (≤500 µA), with wiper resistance of 40 Ω (typ.) at VCC = 5 V. Terminal voltage range spans –VCC to +VCC, supporting bipolar signal conditioning, and absolute linearity is ±1 MI (minimum increment = RTOTAL/31).

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), RoHS-compliant, Pb-free matte tin termination, 3.0 mm × 3.0 mm body, 0.65 mm 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 MCP41050-I/P, the X9313UMZ-3T1 offers deterministic 3-wire timing, guaranteed MSOP-8 fit for space-constrained PCBs, and tighter RTOTAL tolerance - making it optimal for industrial trimming where interface simplicity and board-area efficiency outweigh resolution needs.

Availability

X9313UMZ-3T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device analog front-ends, and telecom laser biasing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for X9313UMZ-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 precision analog and power management specialist, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9313 product line was designed for solid-state replacement of mechanical potentiometers in trimming, calibration, and programmable gain applications - emphasizing nonvolatile retention, temperature stability, and interface simplicity over raw resolution.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313UMZ-3T1?

The X9313UMZ-3T1 supports a maximum differential voltage ΔV = |VH − VL| of 10 V, as specified for the X9313U family in the Absolute Maximum Ratings table. This limit applies regardless of VCC level and ensures safe operation of the internal resistor array and wiper switches. Exceeding 10 V risks irreversible damage to the thin-film resistive elements.

Does X9313UMZ-3T1 require an external clock signal to operate?

No, the X9313UMZ-3T1 does not require an external clock. Its 3-wire interface uses asynchronous edge-triggered control: the INC input is negative-edge sensitive, and wiper movement occurs on each detected falling edge while CS is LOW. Timing is governed solely by INC pulse width (≥1 µs HIGH/LOW periods) and setup/hold requirements relative to U/D and CS - no master clock needed.

How is nonvolatile storage triggered on X9313UMZ-3T1?

Nonvolatile storage on the X9313UMZ-3T1 is triggered by a specific control sequence: while CS is LOW and the wiper is at the desired position, the INC input must be held HIGH, then CS must transition from LOW to HIGH. This CS↑ event with INC HIGH initiates the 10 ms store cycle. If INC is LOW during CS↑, the wiper position is not saved and reverts to the last stored value on next power-up.

Can X9313UMZ-3T1 be used in bipolar signal paths with ±5 V supplies?

Yes, the X9313UMZ-3T1 supports terminal voltages from –VCC to +VCC. With VCC = 5 V, RH/VH and RL/VL may swing from –5 V to +5 V, enabling direct use in ±5 V op-amp circuits such as AC-coupled filters or differential receivers. The wiper (RW/VW) follows this range, and the ±VCC specification ensures correct switching behavior without latch-up or leakage degradation.

What is the wiper resistance specification for X9313UMZ-3T1 at 3.3 V supply?

The datasheet specifies wiper resistance RW as 40 Ω (typ.) at VCC = 5 V. While no explicit value is given for 3.3 V, the underlying CMOS switch architecture implies a moderate increase - typically ≤65 Ω at 3.3 V - due to reduced drive strength. For precision applications, this variation must be included in total system error budgets, especially in low-impedance feedback networks where RW contributes directly to gain error.