Renesas X9420YS16T1

Overview

X9420YS16T1 from Intersil is a single-channel, 64-tap digitally controlled potentiometer (XDCP™) with SPI interface, 2.5 kΩ end-to-end resistance, and nonvolatile storage for four wiper positions. It operates from 2.7V to 5.5V digital/analog supplies and supports ±2.7V to ±5.5V bipolar analog rails, enabling precision voltage divider or variable resistor use in signal conditioning circuits.

For engineers reviewing the X9420YS16T1 datasheet, X9420YS16T1 pinout, X9420YS16T1 application, or X9420YS16T1 equivalent, key selection considerations include its 16-lead SOIC package, 1 µA standby current, 100-year data retention, 100,000-cycle endurance, and support for three-wire SPI with HOLD/CS/WP control - critical for embedded calibration and power management designs.

Technical Context

The X9420YS16T1 implements a 63-segment resistor array with CMOS-switched wiper controlled by a volatile 6-bit Wiper Counter Register (WCR), directly loaded via SPI or transferred from one of four nonvolatile 6-bit Data Registers (DR0–DR3). Power-up automatically loads DR0 into the WCR.

Its SPI interface complies with standard three-wire timing (f_SCK ≤ 2 MHz), supports read/write/transfer instructions, and includes hardware write protection (WP), device addressing (A0), and serial communication pause (HOLD). Analog section uses separate V+/V− supplies; digital logic uses VCC.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal option available (M16.3 drawing).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9420YS16T1, ISL22416 offers simpler register architecture but sacrifices configurability, while ISL95311 provides finer resolution and I²C convenience at the cost of analog rail flexibility - making X9420YS16T1 uniquely suited for bipolar, multi-preset, SPI-based calibration systems.

Availability

X9420YS16T1 is available at Aetrix Electronics and suitable for precision analog calibration, industrial sensor conditioning, and programmable power management requiring stable component supply and long-term parameter retention.

Supply support for X9420YS16T1 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 X9420YS16T1 belongs to Intersil's XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in systems demanding nonvolatile storage, low power, and robust digital interface control.

FAQ

What is the end-to-end resistance value of the X9420YS16T1?

The X9420YS16T1 has a nominal end-to-end resistance of 2.5 kΩ, with a tolerance of ±20% across temperature and process variation. This value is specified in the Ordering Information table and confirmed in the Analog Characteristics section of the FN8195 datasheet. The 2.5 kΩ value distinguishes it from the 10 kΩ variants (e.g., X9420WS16T1) and is optimized for lower impedance signal paths where reduced thermal noise and improved drive capability are required. The X9420YS16T1 maintains this resistance value across its full operating temperature range of 0°C to +70°C.

Does the X9420YS16T1 support bipolar analog operation?

Yes, the X9420YS16T1 supports true bipolar analog operation using separate V+ and V− supply pins. It accepts V+ from +2.7 V to +5.5 V and V− from −2.7 V to −5.5 V, enabling the resistor array to handle signals spanning both positive and negative rails without external level-shifting circuitry. This capability is explicitly defined in the Power Supplies section of the datasheet and verified in Absolute Maximum Ratings (V+ − V− ≤ 12 V). The X9420YS16T1 leverages this feature in applications like op-amp offset trimming and audio signal processing where symmetric swing around ground is essential.

How many nonvolatile memory registers does the X9420YS16T1 include?

The X9420YS16T1 includes four 6-bit nonvolatile Data Registers (DR0 through DR3), each capable of storing a wiper position or general-purpose system parameter. These registers retain data for up to 100 years and withstand 100,000 write cycles, as documented in the Features and Endurance sections of FN8195. Upon power-up, DR0 is automatically loaded into the volatile Wiper Counter Register (WCR), ensuring repeatable startup behavior. Unlike volatile-only digital potentiometers, this architecture allows field-programmable multi-point calibration without host MCU intervention during boot.

What package type is used for the X9420YS16T1?

The X9420YS16T1 is packaged in a 16-lead SOIC (Small Outline Integrated Circuit) with 300-mil body width, per package drawing M16.3. This surface-mount package features gull-wing leads, RoHS-compliant Pb-free plus anneal termination, and is rated for commercial temperature range (0°C to +70°C). The pinout matches industry-standard SOIC-16 layouts, enabling drop-in compatibility with existing PCB footprints designed for similar 16-pin analog ICs. No TSSOP variant exists for the X9420YS16T1 - the YS suffix specifically denotes the 2.5 kΩ SOIC version.

Can the X9420YS16T1 be used with a 3.3 V microcontroller SPI interface?

Yes, the X9420YS16T1 is fully compatible with 3.3 V microcontroller SPI interfaces. Its VCC supply range is 2.7 V to 5.5 V, and its logic-level thresholds (VIH = 0.7 × VCC, VIL = 0.1 × VCC) ensure reliable recognition of 3.3 V logic highs and lows. The SO output is push-pull and drives to full VCC levels, eliminating need for level translators. All timing parameters - including tSU, tH, and fSCK ≤ 2 MHz - are met under 3.3 V operation, as validated in the DC and AC Operating Characteristics tables of FN8195. The X9420YS16T1 has been widely deployed with ARM Cortex-M and PIC32 MCUs in 3.3 V systems.