Renesas X9420YV14I

Overview

X9420YV14I from Intersil is a single-channel, digitally controlled potentiometer (XDCP™) with SPI interface, 64-tap resolution, ±20% end-to-end resistance tolerance, and operation over -40°C to +85°C in a 14-lead TSSOP package. It functions as a solid-state three-terminal potentiometer or two-terminal variable resistor for precision analog control in voltage divider, gain adjustment, and offset calibration circuits.

For engineers reviewing the X9420YV14I datasheet, X9420YV14I pinout, X9420YV14I application, or X9420YV14I equivalent, key selection considerations include its dual-supply analog section (V+ = -5.5V to -2.7V, V- = +2.7V to +5.5V), nonvolatile data register storage (100-year retention), 10kΩ resistor array, and hardware write-protect (WP) pin functionality.

Technical Context

The X9420YV14I implements a 63-segment resistor array with CMOS-switched wiper controlled by a volatile 6-bit Wiper Counter Register (WCR). Its SPI interface supports register-oriented commands including direct WCR read/write, transfer between four 6-bit nonvolatile Data Registers (DR0–DR3) and WCR, and real-time increment/decrement via clocked SI state.

Power-up automatically loads DR0 into the WCR. Analog operation requires independent V+, V− supplies (±2.7V to ±5.5V) and digital VCC (2.7V to 5.5V), with absolute maximum ratings of ±10V on V+/V− and 12V differential. Standby current is <1µA, and nonvolatile writes require up to 10ms with WIP bit monitoring.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4mm width), JEDEC MO-153-AC compliant, RoHS-compliant Pb-free plus anneal finish (M14.173 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22416 and ISL95311, the X9420YV14I uniquely supports true bipolar analog supplies, four independent nonvolatile registers, and hardware write protection-making it the only option among the three for industrial sensor front-ends requiring field-serviceable calibration storage and dual-rail signal conditioning.

Availability

X9420YV14I is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable reference generation, and embedded power supply trimming requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9420YV14I 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 (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial, communications, and computing markets.

The X9420 family was designed as a drop-in solid-state replacement for mechanical potentiometers in systems demanding long-term stability, programmability, and nonvolatile setting retention-particularly in harsh-environment instrumentation and factory automation.

FAQ

What is the absolute maximum voltage rating for the analog supplies of the X9420YV14I?

The X9420YV14I specifies absolute maximum ratings of −10V to +10V on V+ and V− pins individually with respect to VSS, and a maximum differential voltage of 12V between V+ and V−. Exceeding these limits risks permanent damage. The recommended operating range remains −5.5V to −2.7V on V+ and +2.7V to +5.5V on V−. These ratings are confirmed in the Absolute Maximum Ratings table on page 11 of FN8195 Rev.1.00.

Does the X9420YV14I support true bipolar operation, and how is it implemented?

Yes, the X9420YV14I supports true bipolar analog operation via separate V+ and V− supply pins. V+ accepts negative voltages (−5.5V to −2.7V), while V− accepts positive voltages (+2.7V to +5.5V), enabling the resistor array to operate across both polarities. This architecture allows the device to function in AC-coupled circuits, audio signal paths, and precision op-amp configurations where signals swing above and below ground-confirmed in the Recommended Operating Conditions and Analog Characteristics sections of the datasheet.

How many nonvolatile memory registers does the X9420YV14I have, and what is their endurance?

The X9420YV14I contains four 6-bit nonvolatile Data Registers (DR0–DR3), each rated for 100,000 data changes per bit and 100 years of data retention at +25°C. These registers store wiper positions or system parameters independently of the volatile Wiper Counter Register. Nonvolatile writes require up to 10ms and are monitored via the Write In Process (WIP) bit. This specification is explicitly stated in the Features and Endurance and Data Retention tables of FN8195 Rev.1.00.

Can the X9420YV14I be used as a two-terminal variable resistor, and what are the design constraints?

Yes, the X9420YV14I can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to VW/RW and leaving the other terminal open or grounded. Design constraints include limiting wiper current to ±3mA, ensuring voltage on VW/RW stays within V− to V+, and observing power dissipation limits (50mW at 25°C). The datasheet confirms this usage in the DESCRIPTION and APPLICATIONS INFORMATION sections, including schematic examples on page 17.

What is the purpose of the HOLD pin on the X9420YV14I, and how must it be used?

The HOLD pin on the X9420YV14I pauses an ongoing SPI transaction without resetting the internal command sequence. To use it, HOLD must be asserted LOW while SCK is LOW; resuming requires bringing HOLD HIGH while SCK remains LOW. If unused, HOLD must be held HIGH. This feature enables time-sharing of the SPI bus among multiple peripherals without reinitializing communication-detailed in the PIN DESCRIPTIONS and PRINCIPLES OF OPERATION sections of FN8195 Rev.1.00.