Renesas X9420YV14IT1

Overview

X9420YV14IT1 from Intersil is a single-channel, SPI-interface digitally controlled potentiometer (XDCP™) with 64-tap resolution, 2.5kΩ end-to-end resistance, and ±300 ppm/°C temperature coefficient - used for precision voltage divider or variable resistor functions in analog signal conditioning circuits.

For engineers reviewing the X9420YV14IT1 datasheet, X9420YV14IT1 pinout, X9420YV14IT1 application, or X9420YV14IT1 equivalent, key selection factors include its 14-lead TSSOP package, dual-supply analog operation (±2.7V to ±5.5V), nonvolatile storage of four wiper positions, and low standby current (<1 µA) in embedded control and calibration systems.

Technical Context

The X9420YV14IT1 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 register-oriented read/write/transfer operations including direct WCR access and DR0–DR3 nonvolatile storage.

It operates with independent analog supplies (V+, V−) and digital supply (VCC), enabling true bipolar analog signal handling. Hardware write protection (WP) disables nonvolatile writes to data registers while allowing real-time WCR updates - critical for dynamic calibration without unintended parameter retention.

Key Specifications

Pinout & Package

Package: 14-lead Thin Shrink Small Outline Plastic (TSSOP), 4.4 mm body width, RoHS-compliant (Pb-free plus anneal), JEDEC MO-153-AC compliant.

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 X9420YV14IT1 uniquely supports true bipolar analog signal routing via separate V+/V− supplies, making it the only option among the three for applications requiring ±2.7V to ±5.5V wiper voltage swing without external amplification or level translation.

Availability

X9420YV14IT1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable reference generation, and embedded power supply trim requiring stable component supply and long-term parameter retention.

Supply support for X9420YV14IT1 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 (now part of Renesas Electronics) designs high-performance analog and mixed-signal ICs for precision power management, thermal sensing, and interface applications.

The X9420 product line delivers digitally controlled potentiometers optimized for reliability-critical analog trimming tasks in industrial, medical, and test equipment - emphasizing nonvolatile storage, low drift, and robust SPI command architecture.

FAQ

What is the resistance value and tolerance of the X9420YV14IT1?

The X9420YV14IT1 features a 2.5 kΩ end-to-end resistance with ±20% tolerance. This value is specified under recommended operating conditions and applies to the resistor array between VH/RH and VL/RL terminals. The tolerance reflects manufacturing variation across the monolithic CMOS array and is confirmed in the Analog Characteristics table on page 11 of FN8195 Rev.1.00.

Does the X9420YV14IT1 support bipolar analog operation?

Yes, the X9420YV14IT1 supports true bipolar analog operation via independent V+ (+2.7V to +5.5V) and V− (−2.7V to −5.5V) supplies. This allows the wiper (VW/RW) and terminal pins (VH/RH, VL/RL) to swing across the full range from V− to V+, enabling direct use in bipolar signal conditioning without external level-shifting circuitry.

How does the X9420YV14IT1 retain wiper position after power loss?

The X9420YV14IT1 retains wiper position using nonvolatile Data Register 0 (DR0). At power-up, DR0 contents are automatically loaded into the volatile Wiper Counter Register (WCR), restoring the last-saved setting. DR0 is stored in EEPROM with 100-year data retention and 100,000 write endurance, as verified in the Endurance and Data Retention section on page 12.

Can the X9420YV14IT1 be used with a 3.3V microcontroller SPI interface?

Yes, the X9420YV14IT1 is fully compatible with 3.3V SPI interfaces. Its VCC supply range is 2.7V to 5.5V, and input thresholds (VIH = 0.7×VCC, VIL = 0.1×VCC) ensure reliable logic-level recognition from standard 3.3V GPIOs. The SO output is push-pull and drives to full VCC levels, eliminating need for level shifters.

What is the purpose of the HOLD pin on the X9420YV14IT1?

The HOLD pin on the X9420YV14IT1 pauses ongoing SPI communication without resetting the command sequence. When asserted LOW while SCK is LOW, it freezes data transfer; returning HOLD to HIGH resumes from the exact point of interruption. This enables multi-master arbitration or host interrupt handling without losing synchronization - a feature confirmed in the Pin Descriptions section on page 3.