Renesas X9313USI

Overview

X9313USI 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 10 kΩ end-to-end resistance. It functions as a solid-state replacement for mechanical potentiometers in precision analog trimming applications such as DC bias adjustment in op-amp circuits.

For engineers reviewing the X9313USI datasheet, X9313USI pinout, X9313USI application, or X9313USI equivalent, key selection considerations include its industrial temperature range (–40°C to +85°C), SOIC-8 package, 3-wire control protocol, nonvolatile recall on power-up, and compatibility with 5 V ±10% supply operation.

Technical Context

The X9313USI implements a resistor ladder of 31 matched elements with electronic "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.

Control logic operates synchronously on negative-edge-triggered INC input while CS is low; wiper position is stored to nonvolatile memory only when CS rises high while INC is held high. The device supports both three-terminal potentiometer and two-terminal variable resistor configurations with terminal voltages ranging from –V_CC to +V_CC.

Key Specifications

Pinout & Package

Package: 8-lead SOIC (Pb-free, RoHS-compliant), JEDEC MS-012-AA compliant, body dimensions 4.9 mm × 3.9 mm × 1.75 mm.

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 X9313USI offers simpler 3-wire control with guaranteed nonvolatile recall and industrial temperature support in a compact SOIC-8, making it optimal for cost-sensitive, single-pot, self-initializing analog trimming tasks.

Availability

X9313USI is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded instrumentation front-ends, and programmable power supply feedback loops requiring stable component supply and long-term calibration integrity.

Supply support for X9313USI 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 company, now part of Renesas Electronics, with deep expertise in high-reliability industrial and infrastructure solutions.

The X9313 product line delivers digitally programmable analog front-end components optimized for factory-calibrated, maintenance-free analog signal conditioning in harsh environments.

FAQ

What is the maximum allowable voltage across RH/VH and RL/VL terminals for X9313USI?

The X9313USI supports a maximum differential voltage ΔV = |VH − VL| of 10 V under recommended operating conditions. This is specified for X9313W/U variants including X9313USI. Exceeding this limit risks permanent damage to the internal resistor array or wiper switches, even if individual terminal voltages remain within –V_CC to +V_CC bounds. Always verify voltage differentials in your circuit layout before finalizing the design of the X9313USI.

Does X9313USI retain its wiper position after power cycling?

Yes, the X9313USI stores the wiper position in nonvolatile memory and automatically recalls it upon power-up. This behavior is guaranteed by design: the last stored value persists for up to 100 years and survives ≥100,000 store cycles. No external components or MCU intervention are needed for X9313USI to restore its trimmed state after power loss, making it ideal for unattended or remote equipment.

Can X9313USI operate from a 3.3 V supply?

No, the X9313USI is rated for V_CC = 4.5 V to 5.5 V only. It belongs to the "X9313U" family variant with 5 V nominal operation and does not support 3.3 V logic levels or supply rails. For 3 V operation, consider the X9313-3 series (e.g., X9313UMIZ-3), which explicitly specifies a 3 V to 5.5 V supply range. Using 3.3 V with X9313USI will result in undefined logic states and unreliable wiper positioning.

What is the wiper resistance specification for X9313USI at 5 V supply?

The wiper resistance (R_W) for X9313USI is specified as 40 Ω typical and ≤100 Ω maximum at V_CC = 5 V, measured under defined test conditions (I_W = (VH − VL)/R_TOTAL). This low on-resistance ensures minimal gain error or signal attenuation when used in feedback paths or voltage dividers. The value remains stable over temperature due to on-chip compensation, and is confirmed in the Potentiometer Characteristics table of the FN8177 datasheet for the X9313USI.

Is X9313USI pin-compatible with other X9313 variants in SOIC-8 packages?

Yes, all X9313 variants in 8-lead SOIC packages-including X9313USI, X9313USZ, X9313WSI, and X9313ZSI-share identical pinouts per the "Pin Descriptions" and "Pinouts" sections of FN8177 Rev 7.00. Pin 1 is V_CC, Pin 2 is CS, Pin 3 is INC, Pin 4 is U/D, Pin 5 is RL/VL, Pin 6 is V_SS, Pin 7 is RW/VW, and Pin 8 is RH/VH. This allows drop-in substitution among SOIC-packaged X9313 parts when electrical parameters (R_TOTAL, V_CC, temp range) align with system requirements.