Renesas X9313ZST1

Overview

X9313ZST1 from Intersil is a digitally controlled potentiometer (XDCP™) with linear taper, 32-tap resolution, 3-wire serial interface, ±V_CC terminal voltage capability, and 1 kΩ end-to-end resistance. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming circuits, supporting nonvolatile wiper position storage and recall at power-up. Designed for low-power embedded control applications requiring stable resistance adjustment under temperature variation.

For engineers reviewing the X9313ZST1 datasheet, X9313ZST1 pinout, X9313ZST1 application, or X9313ZST1 equivalent, this page delivers verified specifications including 1 kΩ RTOTAL, ±V_CC terminal voltage range, 3-wire up/down interface timing, nonvolatile memory endurance (100,000 cycles), and MSOP-8 package compatibility - all critical for analog signal path design, calibration system integration, and long-life industrial firmware-controlled trims.

Technical Context

The X9313ZST1 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 40 Ω at V_CC = 5 V and absolute linearity error limited to ±1 MI (minimum increment).

Control logic responds to CS (chip select), U/D (direction), and INC (edge-triggered increment) inputs; wiper position is stored in nonvolatile memory only when CS rises while INC is HIGH. The device operates across 3 V to 5.5 V supply, supports ±4.4 mA wiper current, and maintains ratiometric temperature coefficient of ±20 ppm/°C for stable voltage-divider performance.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Pb-free, RoHS compliant), dimensions per JEDEC MO-187-AA (M8.118). Body size 3.0 mm × 3.0 mm × 0.85 mm, pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP41010-I/P, the X9313ZST1 uniquely combines 3-wire simplicity, ±V_CC analog tolerance, and true nonvolatile retention - making it optimal for standalone analog trimming where bus overhead, bipolar operation, and zero-maintenance calibration are mandatory.

Availability

X9313ZST1 is available at Aetrix Electronics and suitable for audio signal level control, DC bias voltage adjustment, laser diode current trim, and power supply feedback divider applications requiring stable component supply, long-term calibration integrity, and RoHS-compliant packaging.

Supply support for X9313ZST1 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 embedded analog control loops - emphasizing nonvolatile memory, temperature-stable resistor arrays, and minimal GPIO interface requirements.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313ZST1?

The X9313ZST1 specifies ΔV = |VH − VL| ≤ 4 V for the X9313Z variant. This limit is defined in the Absolute Maximum Ratings table and applies regardless of V_CC level. Exceeding 4 V risks permanent damage to the internal resistor array or switching network. For applications requiring wider voltage spans, consider the X9313W (10 V) or X9313U (10 V) variants instead of X9313ZST1.

Does X9313ZST1 support true bipolar operation with negative supply rails?

No - X9313ZST1 does not require or support a negative supply rail. Its "±V_CC terminal voltage" specification means RH/VH and RL/VL can each swing from −V_CC to +V_CC relative to V_SS, enabling bipolar analog signal handling (e.g., ±2.5 V across a 5 V V_CC supply). V_SS remains ground-referenced; no negative V_CC or split-supply configuration is needed or supported for X9313ZST1.

How is wiper position stored in nonvolatile memory on X9313ZST1?

Wiper position is stored in nonvolatile memory on X9313ZST1 only when CS transitions from LOW to HIGH while the INC input is held HIGH. This specific edge-and-level condition triggers the 10 ms store cycle (tWR). If CS rises with INC LOW, the device enters standby mode without storing. The stored value is automatically recalled within 10 µs of power-up (tPU), ensuring X9313ZST1 resumes its last calibrated state without MCU intervention.

Can X9313ZST1 be used in a two-terminal variable resistor configuration?

Yes - X9313ZST1 supports two-terminal operation by connecting either RH/VH or RL/VL to RW/VW (wiper), leaving the unused terminal open or tied to a fixed potential. In this mode, resistance varies from near-zero (wiper at shorted terminal) to RTOTAL (wiper at opposite end). Designers must observe ±4.4 mA max wiper current and 16 mW power rating for 1 kΩ devices to avoid thermal overstress in X9313ZST1 two-terminal use cases.

What is the wiper resistance specification for X9313ZST1 and how does it affect circuit accuracy?

X9313ZST1 specifies wiper resistance (RW) as 40 Ω typical, 100 Ω maximum at V_CC = 5 V. This series resistance adds directly to the effective resistance between RW/VW and whichever fixed terminal is used, introducing a small offset in low-resistance settings (e.g., <500 Ω). For precision voltage-divider applications below 10 kΩ, this effect must be included in gain/error calculations; above 10 kΩ, RW contributes <1% error and is often negligible in X9313ZST1 system-level designs.