Renesas X9313UMZ

Overview

X9313UMZ 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, ±V_CC terminal voltage capability, and 50 kΩ end-to-end resistance in an 8-lead MSOP package. It functions as a solid-state replacement for mechanical potentiometers in analog signal trimming, bias adjustment, and programmable gain control circuits.

For engineers reviewing the X9313UMZ datasheet, X9313UMZ pinout, X9313UMZ application, or X9313UMZ equivalent, this device supports precise digital calibration of analog circuits across 0°C to +70°C, operates from 3V to 5.5V, retains settings for 100 years, and delivers <5 µs wiper response with make-before-break switching.

Technical Context

The X9313UMZ implements a 31-element resistor array with decoded 5-bit up/down counter logic driving electronic wiper switches. Its control architecture uses edge-triggered INC input with U/D direction select and CS-gated store-on-high transition to write wiper position to nonvolatile memory.

Terminal voltage range spans –V_CC to +V_CC, enabling bipolar signal handling; wiper resistance is 40 Ω typical at V_CC = 5V; and absolute linearity error is ±1 MI (minimum increment = R_TOTAL/31), supporting accurate voltage division in precision analog paths.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (M8.118), body size 3.0 mm × 3.0 mm × 1.1 mm, Pb-free, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5243BRMZ50 and MCP41050-I/P, the X9313UMZ uniquely combines 3-wire simplicity, ±V_CC analog signal compatibility, and guaranteed make-before-break switching-making it optimal for cost-sensitive, bipolar analog trimming in commercial-grade embedded systems without dedicated serial buses.

Availability

X9313UMZ is available at Aetrix Electronics and suitable for audio signal trimming, programmable gain amplifier design, bias voltage calibration, and reference voltage adjustment requiring stable component supply across commercial temperature ranges.

Supply support for X9313UMZ 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, now part of Renesas Electronics, with deep expertise in high-reliability signal conditioning and mixed-signal solutions.

The X9313 family was designed specifically for digital replacement of mechanical potentiometers in analog front-ends, emphasizing nonvolatile retention, bipolar signal handling, and minimal MCU resource usage in industrial and test equipment.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for X9313UMZ?

The X9313UMZ supports a maximum voltage difference (ΔV = |VH − VL|) of 10 V, consistent with the X9313U series specification. This allows safe operation in ±5 V signal paths or single-supply 10 V systems without risk of terminal breakdown or parametric shift. Always ensure that individual terminal voltages remain within –V_CC to +V_CC limits, as specified in the Absolute Maximum Ratings table of the X9313UMZ datasheet.

Does X9313UMZ require external pull-up resistors on its control pins (CS, U/D, INC)?

No, the X9313UMZ does not require external pull-up resistors on CS, U/D, or INC inputs. Its input leakage current is ±10 µA maximum, and VIH/VIL thresholds are defined relative to V_CC and V_SS. Microcontroller GPIOs configured as push-pull outputs can drive these pins directly. However, if driven by open-drain sources or long PCB traces susceptible to noise, local 10 kΩ pull-ups to V_CC are recommended for robustness-especially on CS to prevent unintended store operations during power-up.

Can X9313UMZ be used in a two-terminal variable resistor configuration, and how is it wired?

Yes, the X9313UMZ supports two-terminal variable resistor operation. Connect either RH/VH or RL/VL to the circuit node requiring variable resistance, tie the wiper RW/VW to the same node, and leave the unused terminal floating or grounded depending on signal polarity requirements. For example, in current-source biasing, RL/VL and RW/VW are shorted to form a programmable current-limiting element between V_CC and load. The 50 kΩ R_TOTAL defines the maximum resistance range in this mode.

How does the nonvolatile store function work on X9313UMZ, and what timing is required?

The X9313UMZ stores the current wiper position in nonvolatile memory when CS transitions from LOW to HIGH while INC is held HIGH. This store cycle requires a minimum t_CPH (CS deselect time) of 20 ms to complete reliably. During this period, the device draws active current and must remain powered. After completion, it enters standby mode (≤500 µA). To avoid accidental stores, ensure INC is LOW before releasing CS, unless intentional storage is intended-verified in the X9313UMZ AC Electrical Specifications table.

Is X9313UMZ pin-compatible with other members of the X9313 family, such as X9313USZ or X9313WMZ?

Yes, the X9313UMZ is pin-compatible with all 8-lead variants in the X9313 family-including X9313USZ (SOIC), X9313WMZ (MSOP), and X9313ZMZ (MSOP)-as confirmed by identical pin names, functions, and top-view layouts across M8.118 and M8.15 package drawings. Differences lie solely in R_TOTAL (1k/10k/50kΩ), temperature grade (0°C to +70°C vs. –40°C to +85°C), and supply range (3–5.5V vs. 4.5–5.5V), not pinout or electrical interface behavior.