Renesas X9420YV14I-2.7

Overview

X9420YV14I-2.7 from Intersil is a single-channel, SPI-interface digitally controlled potentiometer (XDCP™) with 64-tap resolution, 2.5kΩ end-to-end resistance, and industrial temperature range (–40°C to +85°C). It operates from 2.7V to 5.5V analog supplies (V+/V−) and 2.7V–5.5V system supply (VCC), features nonvolatile storage of four wiper positions, and is used for precision analog signal adjustment in programmable power supplies and sensor calibration circuits.

For engineers reviewing the X9420YV14I-2.7 datasheet, X9420YV14I-2.7 pinout, X9420YV14I-2.7 application, or X9420YV14I-2.7 equivalent, key selection criteria include its dual-supply ±2.7V to ±5.5V analog operation, 100,000-cycle endurance, 100-year data retention, TSSOP-14 package compatibility, and SPI register-oriented control supporting direct wiper read/write/transfer.

Technical Context

The X9420YV14I-2.7 implements a 63-segment resistor array with CMOS-switched wiper controlled by a volatile 6-bit Wiper Counter Register (WCR), which loads DR0 at power-up. Its SPI interface supports eight instructions-including Read/Write WCR, Read/Write Data Registers, XFR between registers, and Increment/Decrement-with address decoding via A0 pin enabling up to two devices on one bus.

Analog operation requires independent V+, V−, and VCC supplies; VH/RH and VL/RL serve as fixed terminals, VW/RW as wiper output. Hardware write protection (WP) disables nonvolatile writes to Data Registers while allowing volatile WCR updates. The device supports ratiometric operation with ±20 ppm/°C ratiometric temperature coefficient and –140 dBV noise performance.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (4.4 mm width), RoHS-compliant, moisture sensitivity level (MSL) per JEDEC MO-153-AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9420YV14I-2.7, ISL22416 offers finer resolution but sacrifices bipolar analog capability, while ISL95311 provides channel density at the cost of package size and absence of independent analog rails-making X9420YV14I-2.7 uniquely suited for precision bipolar signal conditioning in compact industrial layouts.

Availability

X9420YV14I-2.7 is available at Aetrix Electronics and suitable for programmable power supplies, sensor calibration systems, industrial DAC interfaces, and audio gain control circuits requiring stable component supply across extended temperature and dual-supply operation.

Supply support for X9420YV14I-2.7 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 company specializing in precision analog, power management, and interface ICs for industrial, aerospace, and communications markets.

The X9420 family was designed for high-reliability analog trimming in harsh environments, emphasizing nonvolatile storage, wide supply tolerance, and robust SPI control for embedded calibration and parameter tuning.

FAQ

What is the operating temperature range for X9420YV14I-2.7?

The X9420YV14I-2.7 is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in the Ordering Information table on page 2 of FN8195 Rev.1.00, where the "I" suffix denotes the industrial grade. The device maintains full specification compliance-including 64-tap resolution, 2.5kΩ resistance tolerance, and SPI timing-across this entire range.

Does X9420YV14I-2.7 support true bipolar analog operation?

Yes, X9420YV14I-2.7 supports true bipolar analog operation via independent V+ (+2.7V to +5.5V) and V− (–2.7V to –5.5V) supplies. This allows the resistor array to span symmetric or asymmetric bipolar ranges-e.g., ±3V or –2.7V to +5.5V-enabling direct use in AC-coupled signal paths, op-amp level-shifting, and sensor front-ends without external biasing circuitry.

How many nonvolatile wiper positions can be stored in X9420YV14I-2.7?

The X9420YV14I-2.7 includes four 6-bit nonvolatile Data Registers (DR0–DR3), each capable of storing one wiper position. DR0 is automatically loaded into the volatile Wiper Counter Register (WCR) at power-up. All four registers retain data for 100 years and withstand 100,000 write cycles, enabling factory calibration, user presets, and fail-safe recovery states.

What is the purpose of the HOLD pin on X9420YV14I-2.7?

The HOLD pin on X9420YV14I-2.7 pauses an ongoing SPI transaction without resetting the command sequence. To activate, HOLD must be driven LOW while SCK is LOW; resuming requires driving HOLD HIGH while SCK remains LOW. This feature allows host controllers to temporarily suspend communication-e.g., during interrupt servicing-without losing synchronization or requiring reinitialization.

Can X9420YV14I-2.7 be used as a two-terminal variable resistor?

Yes, X9420YV14I-2.7 can be configured as a two-terminal variable resistor by connecting either VH/RH or VL/RL to circuit ground and using VW/RW as the adjustable terminal. The datasheet explicitly states this capability on page 1, confirming suitability for current-limiting, gain-setting, and bias adjustment applications where only one variable endpoint is needed.