Renesas X9313ZMI-3

Overview

X9313ZMI-3 from Intersil is a digitally controlled potentiometer (XDCP™) with linear taper, 32-tap resolution, nonvolatile wiper position storage, ±V_CC terminal voltage capability, and 3-wire serial interface. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits requiring power-up repeatability and low-power operation.

For engineers reviewing the X9313ZMI-3 datasheet, X9313ZMI-3 pinout, X9313ZMI-3 application, or X9313ZMI-3 equivalent, key selection criteria include its 1kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, MSOP-8 package, 3V–5.5V supply compatibility, and make-before-break wiper switching behavior.

Technical Context

The X9313ZMI-3 implements a 31-element resistor array with electronically switched wiper access at 32 discrete tap points, controlled by an up/down counter decoded via CS, U/D, and edge-triggered INC inputs. Its nonvolatile memory stores wiper position on CS↑ with INC HIGH, enabling automatic recall at power-up.

It operates as either a three-terminal potentiometer or two-terminal variable resistor, with wiper resistance ≤100Ω (typ. 40Ω at V_CC = 5V), ±4.4mA max wiper current, and ratiometric temperature coefficient of ±20 ppm/°C - critical for stable voltage-divider accuracy across temperature.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA (PKG DWG # M8.118).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ-10 and MCP41010-I/P, the X9313ZMI-3 delivers guaranteed power-up repeatability without host intervention, lower R_TOTAL for reduced thermal noise in low-level analog paths, and simpler 3-wire control - making it optimal for self-contained industrial trim applications.

Availability

X9313ZMI-3 is available at Aetrix Electronics and suitable for laser diode bias control, programmable gain amplifiers, offset voltage calibration, and audio channel balance requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for X9313ZMI-3 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 IC specialist, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and high-end consumer markets.

The X9313 family was designed specifically for replacing mechanical potentiometers in analog signal-path trimming applications where power-up repeatability, temperature stability, and long-term reliability are mandatory.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313ZMI-3?

The X9313ZMI-3 specifies ΔV = |VH − VL| ≤ 4V for the Z-series variant. This limit ensures safe operation of the 1kΩ resistor array and internal switches under all conditions, including transient events. Exceeding 4V risks irreversible damage to the wiper switching network and may compromise nonvolatile memory integrity.

Does X9313ZMI-3 require an external pull-up resistor on the INC line?

No, the X9313ZMI-3 does not require an external pull-up on the INC line. Its input structure accepts standard CMOS logic levels (V_IL ≤ 0.8V, V_IH ≥ 2V), and internal design accommodates direct connection to microcontroller GPIO pins. External pull-ups are unnecessary and may interfere with the precise negative-edge timing required for reliable wiper stepping.

Can X9313ZMI-3 be used in a bipolar signal path with ±5V supplies?

Yes, the X9313ZMI-3 supports terminal voltages from -V_CC to +V_CC. With V_CC = 5V, RH/VH and RL/VL tolerate -5V to +5V, enabling direct use in ±5V op-amp circuits such as active filters and differential receivers. The wiper (RW/VW) remains referenced to V_SS, so proper level-shifting or rail-to-rail op-amp buffering may be needed for full bipolar output swing.

How long does it take for X9313ZMI-3 to stabilize its wiper position after power-up?

The X9313ZMI-3 achieves wiper stability within 10µs after V_CC reaches its final value (t_PU specification). This rapid settling occurs automatically upon recall from nonvolatile memory - no host command or delay is required. For systems demanding sub-microsecond timing, ensure V_CC ramp rate stays within 0.2–50 V/ms to prevent spurious wiper movement during power ramp.

Is the wiper resistance of X9313ZMI-3 constant across all tap positions?

No, the wiper resistance of X9313ZMI-3 varies slightly with tap position due to series switch resistance and routing parasitics, but remains bounded at ≤100Ω (typ. 40Ω at V_CC = 5V) across all 32 positions. This variation is negligible relative to the 1kΩ end-to-end resistance and does not affect linearity specifications - absolute linearity remains ±1 MI (±1/31 of R_TOTAL) as guaranteed in the datasheet.