Renesas X9313ZMIT1

Overview

X9313ZMIT1 from Intersil is a digitally controlled potentiometer (XDCP™) with linear taper, 32-tap resolution, 3-wire serial interface, ±V_CC terminal voltage capability, and 1kΩ end-to-end resistance. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits, retaining wiper position in nonvolatile memory across power cycles. Designed for low-power industrial control and signal conditioning applications requiring stable, repeatable resistance adjustment.

For engineers reviewing the X9313ZMIT1 datasheet, X9313ZMIT1 pinout, X9313ZMIT1 application, or X9313ZMIT1 equivalent, key selection criteria include its 1kΩ RTOTAL, -40°C to +85°C industrial temperature range, MSOP-8 package, 3-wire up/down interface timing, and nonvolatile wiper storage-critical for calibration-critical systems where power-loss recovery is mandatory.

Technical Context

The X9313ZMIT1 implements a 31-element resistor array with electronically switched wiper access at 32 discrete tap points, controlled via CS, U/D, and edge-triggered INC signals. Its 5-bit up/down counter drives a decoder that selects one of 32 wiper positions, enabling precise digital resistance setting without external microcontroller firmware overhead.

Wiper position is stored into nonvolatile memory on CS↑ while INC is HIGH (store cycle = 10ms), and automatically recalled at power-up. The device operates with V_CC = 3V to 5.5V, supports terminal voltages from -V_CC to +V_CC, and features make-before-break switching to prevent open-circuit transients during wiper movement.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mo-187-AA compliant), 3.0mm × 3.0mm body, 0.65mm pitch, RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-1 and MCP41HV51-103E/SN, the X9313ZMIT1 uniquely balances industrial-grade temperature range, compact MSOP-8 packaging, true nonvolatile wiper storage without refresh, and 1kΩ RTOTAL optimized for low-impedance analog signal paths-making it ideal for embedded calibration where reliability and board space are constrained.

Availability

X9313ZMIT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, laser diode bias control, and audio level management requiring stable component supply across extended temperature operation and long product lifecycles.

Supply support for X9313ZMIT1 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 semiconductor company, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and computing markets.

The X9313 family was designed specifically for replacing mechanical potentiometers in calibration-critical analog systems-emphasizing nonvolatile memory, wide voltage tolerance, and robust industrial temperature performance.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for X9313ZMIT1?

The absolute maximum voltage difference (ΔV = |VH − VL|) for the X9313ZMIT1 is 4V, as specified in the Absolute Maximum Ratings table. This limit applies regardless of V_CC level and must not be exceeded to prevent damage to the internal resistor array or switching network. Operation within this 4V window ensures reliable performance across the full -40°C to +85°C temperature range.

Does X9313ZMIT1 require an external clock or microcontroller to retain wiper position after power-down?

No, X9313ZMIT1 does not require external components to retain wiper position. Its integrated nonvolatile memory stores the last wiper setting upon command (CS↑ with INC HIGH) and automatically recalls it at power-up. The device retains data for 100 years without battery backup or MCU intervention, making X9313ZMIT1 self-sufficient for calibration persistence.

Can X9313ZMIT1 be used with a 3.3V microcontroller GPIO driving CS, U/D, and INC inputs?

Yes, X9313ZMIT1 supports 3.3V logic-level control: its input thresholds (V_IL ≤ 0.8V, V_IH ≥ 2V) are compatible with standard 3.3V CMOS outputs. With V_CC = 3V–5.5V, the device operates correctly under 3.3V supply, and all control inputs meet voltage compatibility requirements-no level-shifting circuitry is needed when interfacing with 3.3V MCUs.

What is the wiper resistance specification for X9313ZMIT1 and how does it affect circuit accuracy?

X9313ZMIT1 specifies wiper resistance (R_W) as 40Ω typical at V_CC = 5V. This series resistance introduces a fixed offset in two-terminal configurations and slight gain error in three-terminal voltage dividers. For example, in a 1kΩ RTOTAL divider, 40Ω adds ≤4% error at extreme tap positions-acceptable for most trimming applications but accounted for in high-precision designs using calibration offsets.

How does the "make-before-break" switching behavior of X9313ZMIT1 improve system reliability?

The "make-before-break" switching ensures the new wiper tap connects before the previous one disconnects, preventing momentary open-circuit conditions during position changes. This eliminates transient glitches in closed-loop amplifier feedback paths and avoids current interruption in bias networks-critical for maintaining stable operation in laser drivers, sensor interfaces, and audio circuits where discontinuities could cause latch-up or audible pop.