Renesas X9313ZSZ

Overview

X9313ZSZ from Intersil is a digitally controlled potentiometer (XDCP™) with 32 linear tap positions, 1kΩ end-to-end resistance, 3-wire serial interface (CS/U/D/INC), ±VCC terminal voltage range, and nonvolatile wiper position storage. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits requiring power-up recall and low-power operation.

For engineers reviewing the X9313ZSZ datasheet, X9313ZSZ pinout, X9313ZSZ application, or X9313ZSZ equivalent, this device supports stable voltage divider configurations, two-terminal variable resistor use, temperature-compensated resistance matching, and embedded system parameter calibration without external EEPROM.

Technical Context

The X9313ZSZ implements a 31-element resistor array with make-before-break wiper switching, enabling glitch-free tap transitions. Its 5-bit up/down counter drives a decoder that selects one of 32 wiper positions, with wiper resistance typically 40Ω at 5V.

Nonvolatile memory stores the last wiper position on CS↑ while INC is HIGH, ensuring automatic restoration at power-up. The device operates from 3V to 5.5V, supports ±4.4mA wiper current, and maintains ±20% end-to-end resistance tolerance across temperature.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant, M8.15 outline).

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 X9313ZSZ offers unique ±VCC terminal capability for bipolar signal paths, guaranteed power-up recall without firmware intervention, and minimal GPIO footprint-making it optimal for robust, self-contained analog trimming in resource-constrained embedded systems.

Availability

X9313ZSZ is available at Aetrix Electronics and suitable for industrial sensor calibration, medical instrument gain setting, audio level control, laser diode biasing, and embedded system parameter trimming requiring stable component supply and long-term reliability.

Supply support for X9313ZSZ 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 leader in precision analog and power management ICs, serving industrial, infrastructure, and high-end consumer markets with high-reliability, feature-rich solutions.

The X9313 family was designed specifically for solid-state replacement of mechanical potentiometers in analog signal conditioning, offering nonvolatile storage, temperature-stable resistance, and simple 3-wire digital control for embedded trimming applications.

FAQ

What is the maximum allowable voltage difference between RH/VH and RL/VL terminals for X9313ZSZ?

The maximum voltage difference (ΔV = |VH − VL|) for X9313ZSZ is 4V, as specified in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and must be observed to prevent damage to the internal resistor array or switching elements. Exceeding 4V risks irreversible degradation of wiper contact reliability and long-term resistance stability.

Does X9313ZSZ require external pull-up or pull-down resistors on its control pins?

No, X9313ZSZ does not require external pull-up or pull-down resistors on CS, U/D, or INC inputs. Internal circuitry provides sufficient input leakage control (±10µA max), and the device operates reliably with direct GPIO connection. However, for noise immunity in electrically noisy environments, a 10kΩ pull-down on CS is recommended to ensure default deselection during MCU reset.

Can X9313ZSZ be used in a two-terminal variable resistor configuration with only RH/VH and RW/VW connected?

Yes, X9313ZSZ supports two-terminal operation using RH/VH and RW/VW, with RL/VL left unconnected. In this mode, it functions as a digitally adjustable series resistance where RW/VW serves as the variable node. The 1kΩ RTOTAL defines the maximum resistance, and wiper position determines the effective value between RH/VH and RW/VW, subject to the 40Ω typical wiper resistance.

What is the minimum pulse width required on the INC input to guarantee wiper movement in X9313ZSZ?

The minimum INC HIGH period (tIH) and LOW period (tIL) are both specified as 1µs. To guarantee reliable wiper advancement, the INC signal must meet or exceed these timing constraints. Additionally, the INC cycle time (tCYC) must be ≥2µs, meaning the full toggle (HIGH→LOW→HIGH) must not occur faster than 500kHz to avoid missed steps or metastability in the internal counter.

How does the X9313ZSZ handle power-up sequencing, and what happens if VCC ramps slowly?

X9313ZSZ requires VCC to be applied before control signals; the datasheet specifies a VCC ramp rate of 0.2–50 V/ms. If VCC rises too slowly (<0.2 V/ms), the internal power-on reset may not activate correctly, potentially causing undefined wiper position or failed nonvolatile recall. To ensure proper initialization, bring CS and INC HIGH concurrently with or just after VCC reaches 3V, and wait ≥10µs before issuing commands.