Renesas X9313ZSI-3

Overview

X9313ZSI-3 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 1kΩ end-to-end resistance. It operates from 3V to 5.5V, supports terminal voltages from –VCC to +VCC, and functions as a three-terminal voltage divider or two-terminal variable resistor in analog trimming applications.

For engineers reviewing the X9313ZSI-3 datasheet, X9313ZSI-3 pinout, X9313ZSI-3 application, or X9313ZSI-3 equivalent, key selection criteria include its ±20% RTOTAL tolerance, 40Ω typical wiper resistance at 5V, 100,000-cycle endurance, 100-year data retention, and compatibility with industrial temperature range (–40°C to +85°C) in SOIC-8 packaging.

Technical Context

The X9313ZSI-3 implements a 31-element resistor array with make-before-break wiper switching, controlled by an up/down counter decoded into 32 discrete tap points. Its nonvolatile memory stores wiper position on CS↑ with INC HIGH, enabling automatic recall at power-up.

It uses low-power CMOS logic with active current ≤3mA and standby current ≤500µA, and supports bidirectional terminal voltage swing (–VCC to +VCC) across RH/VH, RL/VL, and RW/VW terminals-enabling use in AC-coupled and bipolar signal paths without external level-shifting.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012-AA compliant.

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 X9313ZSI-3 offers unique advantages in simplicity (3-wire interface), guaranteed nonvolatile retention, and bipolar terminal voltage capability-making it optimal for industrial analog signal conditioning where reliability and minimal firmware overhead are critical.

Availability

X9313ZSI-3 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, and audio level control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for X9313ZSI-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 semiconductor provider, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 family was designed specifically for robust, maintenance-free analog trimming in harsh environments-emphasizing nonvolatile retention, wide supply range, and bipolar signal handling over raw resolution or speed.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313ZSI-3?

The X9313ZSI-3 supports a maximum differential voltage ΔV = |VH – VL| of 4V under all operating conditions. This limit is specified in the Absolute Maximum Ratings table and applies regardless of supply voltage. Exceeding 4V risks irreversible damage to the internal resistor array switches. The device also allows each terminal to swing from –VCC to +VCC relative to VSS, but the total voltage drop across the entire potentiometer must remain within the 4V ceiling.

Does X9313ZSI-3 require external pull-up resistors on its control pins?

No, the X9313ZSI-3 does not require external pull-up resistors on CS, U/D, or INC inputs. All three digital control pins have CMOS-compatible input thresholds (VIH ≥ 2V, VIL ≤ 0.8V at VCC = 5V) and exhibit low leakage (±10µA max). Internal circuitry ensures defined logic states during power-up when driven directly from microcontroller GPIOs. However, if floating states are possible during system reset, external 10kΩ pull-downs on CS and U/D are recommended to prevent unintended wiper movement.

Can X9313ZSI-3 be used in AC-coupled signal paths with no DC bias?

Yes, the X9313ZSI-3 supports true bipolar operation: RH/VH, RL/VL, and RW/VW terminals tolerate voltages from –VCC to +VCC relative to VSS. This allows direct placement in AC-coupled paths (e.g., audio coupling capacitors feeding both ends) without external bias networks. The 4V ΔV limit still applies, so peak-to-peak AC signals must stay within that envelope. The device's temperature-compensated resistor array ensures stable performance across the full –40°C to +85°C range.

How many wiper position changes can X9313ZSI-3 endure before failure?

The X9313ZSI-3 is rated for 100,000 data changes per bit in nonvolatile memory, verified per JEDEC standards. This endurance applies to store operations (CS↑ with INC HIGH), not incremental INC toggles. Each store writes the current 5-bit wiper position to EEPROM. The device retains stored values for 100 years at +25°C ambient. Field usage typically involves infrequent calibration-making this specification sufficient for >15 years of daily adjustments in industrial equipment.

Is the wiper resistance of X9313ZSI-3 constant across all tap positions?

Wiper resistance (RW) is approximately constant across all 32 taps, with a typical value of 40Ω at VCC = 5V and a maximum of 100Ω across temperature and process variation. This consistency is achieved through matched transistor sizing in the wiper switch network and is confirmed in the Potentiometer Characteristics table. Unlike mechanical pots, the X9313ZSI-3 avoids contact-resistance drift-ensuring predictable insertion loss whether the wiper is near RH/VH, RL/VL, or mid-scale.