Renesas X9400YS24I-2.7T1

Overview

X9400YS24I-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with SPI interface, 64-tap resolution per channel, 10 kΩ end-to-end resistance, ±20% tolerance, and 2.7V to 5.5V system supply operation. It integrates four independent resistor arrays with nonvolatile data registers (DR0–DR3), wiper counter registers (WCR), and hardware write protection (WP) for precision analog control in programmable gain stages and offset calibration circuits.

For engineers reviewing the X9400YS24I-2.7T1 datasheet, X9400YS24I-2.7T1 pinout, X9400YS24I-2.7T1 application, or X9400YS24I-2.7T1 equivalent, this device supports low-noise (<−120 dBV), low-power (standby <1 µA), and high-reliability (100-year data retention, 100,000 write cycles) analog trimming across industrial temperature range (−40°C to +85°C) in 24-lead SOIC packaging.

Technical Context

The X9400YS24I-2.7T1 implements four independent 63-segment resistor arrays, each controlled by a 6-bit volatile Wiper Counter Register decoded to select one of 64 tap points. Each array features VH/RH and VL/RL terminals plus a CMOS-switched VW/RW wiper output, supporting both three-terminal potentiometer and two-terminal variable resistor configurations.

It uses standard SPI protocol (CS, SCK, SI, SO) with device addressing via A0/A1 pins, HOLD for serial pause, and WP for hardware write lock. Nonvolatile storage uses on-chip EEPROM-like cells with 10 ms max write time and automatic power-on recall of DR0 into WCR.

Key Specifications

Pinout & Package

Package: 24-lead SOIC (300 mil), RoHS-compliant Pb-free plus anneal finish, M24.3 package drawing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5204BRUZ10 and MCP42050-I/P, the X9400YS24I-2.7T1 uniquely combines quad-channel SPI control, true bipolar analog operation (±5.5 V), and guaranteed DR0 power-on recall-making it optimal for industrial signal conditioning where reliability, rail flexibility, and autonomous startup behavior are critical.

Availability

X9400YS24I-2.7T1 is available at Aetrix Electronics and suitable for programmable gain amplifiers, offset voltage calibration circuits, voltage regulator feedback networks, comparator hysteresis control, and analog sensor signal conditioning requiring stable component supply across industrial temperature ranges.

Supply support for X9400YS24I-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 Corporation is a precision analog and power management semiconductor company, now part of Renesas Electronics, with expertise in high-reliability industrial and infrastructure solutions.

The X9400 product line was designed for digitally programmable analog trimming in harsh-environment applications-emphasizing nonvolatile calibration retention, low-power operation, and robust SPI-controlled resistor arrays.

FAQ

What is the analog voltage range supported by the X9400YS24I-2.7T1?

The X9400YS24I-2.7T1 supports analog supply rails from −5.5 V to +5.5 V on V+ and V− pins, enabling direct use in bipolar signal paths without external level-shifting components. This range is independent of the 2.7 V to 5.5 V VCC supply and is validated across the full −40°C to +85°C operating temperature range. The X9400YS24I-2.7T1 maintains specified wiper resistance and linearity within these limits.

Does the X9400YS24I-2.7T1 retain wiper settings after power cycling?

Yes-the X9400YS24I-2.7T1 automatically loads the contents of Data Register 0 (DR0) into the Wiper Counter Register (WCR) on power-up, ensuring repeatable startup behavior. Each of the four potentiometers has its own DR0, and all four DR0 values are stored nonvolatily with 100-year retention and 100,000 write cycles. The X9400YS24I-2.7T1 does not require host initialization to restore calibrated positions.

Can the X9400YS24I-2.7T1 be used as a two-terminal variable resistor?

Yes-the X9400YS24I-2.7T1 supports two-terminal operation by connecting either VH or VL to the wiper (VW) and using the remaining terminal as the variable node. In this mode, it functions as a digitally adjustable current-limiting or gain-setting element. The X9400YS24I-2.7T1 maintains 40 Ω typical wiper resistance at 5 V and retains full 64-tap resolution and nonvolatile storage in this configuration.

What SPI clock frequency does the X9400YS24I-2.7T1 support?

The X9400YS24I-2.7T1 supports SPI clock frequencies up to 2.0 MHz, with minimum high/low times of 200 ns each. It uses standard SPI Mode 0 (CPOL = 0, CPHA = 0): data sampled on the rising edge of SCK and output on the falling edge. The X9400YS24I-2.7T1 also supports HOLD pin pausing and multi-device addressing via A0/A1, making it compatible with resource-constrained microcontroller SPI peripherals.

How is hardware write protection implemented on the X9400YS24I-2.7T1?

The X9400YS24I-2.7T1 uses the WP (Write Protect) pin to disable nonvolatile writes to its Data Registers: when WP is driven LOW, all instructions targeting DR0–DR3 (e.g., Write Data Register, XFR to DR) are blocked, though volatile WCR updates remain functional. This prevents accidental overwriting of factory or field-calibrated settings while allowing runtime wiper adjustment. The X9400YS24I-2.7T1 requires no external pull-up if WP is permanently enabled.