Renesas X9313ZSIZT1

Overview

X9313ZSIZT1 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, offering 1 kΩ end-to-end resistance, -40°C to +85°C industrial temperature range, and RoHS-compliant 8-lead SOIC packaging.

For engineers reviewing the X9313ZSIZT1 datasheet, X9313ZSIZT1 pinout, X9313ZSIZT1 application, or X9313ZSIZT1 equivalent, key selection criteria include its 1 kΩ RTOTAL tolerance (±20%), wiper resistance (40 Ω typ. at VCC = 5 V), nonvolatile store/recall timing (10 ms store cycle), and compatibility with 3 V to 5.5 V supply operation - critical for embedded sensor calibration and power supply feedback loop tuning.

Technical Context

The X9313ZSIZT1 implements a 31-element resistor array with make-before-break wiper switching, decoded by a 5-bit up/down counter controlled via CS, U/D, and edge-triggered INC inputs. Its nonvolatile memory retains wiper position across power cycles, enabling deterministic startup behavior without external configuration.

Operation supports both three-terminal potentiometer and two-terminal variable resistor configurations. Terminal voltage range spans -V_CC to +V_CC, allowing bipolar signal handling, while absolute linearity error is limited to ±1 MI (minimum increment = R_TOTAL/31) and ratiometric temperature coefficient is ±20 ppm/°C.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS compliant), M8.15 outline, body width 3.9 mm, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9313ZSIZT1, AD5170BRMZ-10 offers I²C convenience but lacks ±V_CC terminal rating and 1 kΩ option, while MCP41010-I/P delivers finer resolution yet mandates active wiper reinitialization - making X9313ZSIZT1 optimal for robust, self-contained analog trimming in industrial environments.

Availability

X9313ZSIZT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply feedback tuning, and audio signal level control requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.

Supply support for X9313ZSIZT1 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 replacing mechanical potentiometers in analog signal conditioning, power control, and sensor interface circuits where long-term stability, digital programmability, and nonvolatile setting retention are essential.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313ZSIZT1?

The absolute maximum voltage difference |VH − VL| for X9313ZSIZT1 is 4 V, as specified in the Absolute Maximum Ratings table. This limit applies regardless of supply voltage and ensures safe operation of the internal resistor array and switching elements. Exceeding this differential may cause irreversible damage. The device supports terminal voltages from −V_CC to +V_CC, but the net voltage across the potentiometer terminals must remain within the 4 V ceiling.

Does X9313ZSIZT1 require an external pull-up or pull-down resistor on the INC, U/D, or CS pins?

No, X9313ZSIZT1 does not require external pull-up or pull-down resistors on INC, U/D, or CS. The device specifies input leakage current of ±10 µA and defined VIH (≥2 V) and VIL (≤0.8 V) thresholds at V_CC = 5 V, indicating internally biased CMOS inputs. Driving these pins directly from microcontroller GPIOs - with appropriate logic levels and slew rate control - is sufficient. External resistors are unnecessary unless system-level noise immunity or fail-safe default states are required.

How does the nonvolatile store function work on X9313ZSIZT1, and what timing is required?

The nonvolatile store on X9313ZSIZT1 is triggered by a rising edge on CS while INC is held HIGH. Once initiated, the store cycle completes in 10 ms (tWR), during which the device enters standby mode. During this time, V_CC must remain stable within specification. After completion, the wiper position is retained for ≥100 years. The X9313ZSIZT1 automatically recalls this stored value on subsequent power-up, eliminating need for host initialization code.

Can X9313ZSIZT1 be used in a bipolar signal path where VH is at +2.5 V and VL is at −2.5 V?

Yes, X9313ZSIZT1 supports bipolar operation: VH and VL may be set to +2.5 V and −2.5 V respectively, provided V_CC ≥ 5 V and |VH − VL| ≤ 4 V. The datasheet explicitly permits terminal voltages from −V_CC to +V_CC, and the 4 V differential limit is satisfied. In this configuration, the wiper (RW/VW) will swing between −2.5 V and +2.5 V, enabling true AC-coupled or dual-supply analog signal adjustment without level-shifting components.

What is the wiper resistance specification for X9313ZSIZT1, and how does it affect circuit performance?

X9313ZSIZT1 specifies wiper resistance as 40 Ω typical (max 100 Ω) at V_CC = 5 V. This low on-resistance minimizes insertion loss and gain error when used in voltage divider or amplifier feedback configurations. For example, in a 1 kΩ total resistance divider, 40 Ω adds only ~4% series error at mid-scale - well within tolerance for most trimming applications. The value remains stable across temperature due to on-chip compensation, ensuring consistent performance in industrial environments.