Renesas X9420YV14I-2.7T1

Overview

X9420YV14I-2.7T1 from Intersil is a single-channel, SPI-interface digitally controlled potentiometer (XDCP™) with 64-tap resolution, ±20% end-to-end resistance tolerance, and dual-supply analog operation (V+ = +2.7V to +5.5V, V− = −5.5V to −2.7V). It integrates volatile wiper counter register (WCR) and four nonvolatile data registers (DR0–DR3), enabling storage of up to four wiper positions and supporting power-up recall from DR0. It is used in precision offset adjustment, programmable gain control, and voltage regulator feedback networks.

For engineers reviewing the X9420YV14I-2.7T1 datasheet, X9420YV14I-2.7T1 pinout, X9420YV14I-2.7T1 application, or X9420YV14I-2.7T1 equivalent, key selection considerations include its 14-lead TSSOP package, −40°C to +85°C industrial temperature range, 2.7V to 5.5V VCC supply, dual-polarity analog rail support, and nonvolatile wiper position storage capability.

Technical Context

The X9420YV14I-2.7T1 implements a 63-resistor-segment linear array with CMOS-switched wiper controlled by a 6-bit Wiper Counter Register (WCR). Its SPI interface complies with standard serial clock (SCK), chip select (CS), serial input (SI), and serial output (SO) timing, including HOLD for communication pause and A0 for dual-device bus addressing.

Analog operation uses independent V+ and V− supplies (±2.7V to ±5.5V), while digital logic runs from VCC (2.7V to 5.5V). The device supports direct WCR read/write, transfer between WCR and any of four 6-bit nonvolatile data registers, and real-time increment/decrement via SI level during SCK pulses - all without requiring external EEPROM or microcontroller GPIO overhead.

Key Specifications

Pinout & Package

Package: 14-lead Thin Shrink Small Outline Plastic (TSSOP), JEDEC MO-153-AC compliant, body dimensions 4.95 mm × 4.30 mm × 1.05 mm (D × E1 × A2), lead 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 X9420YV14I-2.7T1, ISL22416 offers finer resolution and I²C simplicity but sacrifices bipolar analog flexibility, while ISL95311 provides channel multiplicity at the cost of V− compatibility - making X9420YV14I-2.7T1 uniquely suited for precision bipolar signal conditioning where rail-splitting or dual-supply op-amps are used.

Availability

X9420YV14I-2.7T1 is available at Aetrix Electronics and suitable for industrial instrumentation, programmable power supplies, and sensor calibration systems requiring stable component supply, long-term obsolescence mitigation, and guaranteed −40°C to +85°C performance.

Supply support for X9420YV14I-2.7T1 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, communications, and computing markets.

The X9420 product line was designed as a solid-state replacement for mechanical potentiometers in digitally programmable analog systems, emphasizing nonvolatile storage, SPI simplicity, and robust bipolar analog operation.

FAQ

What is the maximum SPI clock frequency supported by the X9420YV14I-2.7T1?

The X9420YV14I-2.7T1 supports an SPI clock frequency up to 2.0 MHz, as specified in the AC timing section of the FN8195 datasheet. This allows fast register access and wiper updates - for example, a full WCR write completes within 3 SCK cycles (≤1.5 µs at 2 MHz), enabling real-time gain or offset adjustments in closed-loop control systems using the X9420YV14I-2.7T1.

Does the X9420YV14I-2.7T1 support true bipolar operation, and what are the voltage limits?

Yes, the X9420YV14I-2.7T1 supports true bipolar analog operation via separate V+ and V− pins. Per the datasheet, V+ operates from +2.7 V to +5.5 V and V− from −5.5 V to −2.7 V, enabling wiper output (VW) to swing fully between these rails. This makes the X9420YV14I-2.7T1 suitable for op-amp offset nulling, AC-coupled signal paths, and other applications requiring negative reference potentials - unlike unipolar-only digital potentiometers.

How many nonvolatile wiper positions can be stored in the X9420YV14I-2.7T1, and how are they recalled?

The X9420YV14I-2.7T1 includes four 6-bit nonvolatile Data Registers (DR0–DR3), each capable of storing one wiper position. Upon power-up, the contents of DR0 are automatically loaded into the volatile Wiper Counter Register (WCR), restoring the last-saved default setting. Users may also manually transfer any DRx value to WCR at runtime using the XFR Data Register instruction - a key feature enabling multi-mode operation in the X9420YV14I-2.7T1.

What is the end-to-end resistance value and tolerance of the X9420YV14I-2.7T1?

The X9420YV14I-2.7T1 features a 2.5 kΩ resistor array with a ±20% end-to-end resistance tolerance, as confirmed in the Ordering Information table and Analog Characteristics section of FN8195. This tolerance applies across the full −40°C to +85°C temperature range and affects absolute gain/attenuation accuracy in voltage divider configurations - users should calibrate system-level gain if high absolute accuracy is required for the X9420YV14I-2.7T1.

Is the X9420YV14I-2.7T1 pin-compatible with other members of the X9420 family?

Yes, the X9420YV14I-2.7T1 shares identical pinout and footprint with all 14-lead TSSOP variants in the X9420 family, including X9420WV14I-2.7*, X9420YV14*, and X9420WV14*. Differences lie solely in resistance value (2.5 kΩ vs. 10 kΩ), supply voltage labeling (−2.7 suffix denotes 2.7V min VCC), and temperature grade - all maintain mechanical and electrical compatibility, allowing drop-in substitution where resistance and supply requirements align for the X9420YV14I-2.7T1.