Renesas X9400YS24-2.7T1

Overview

X9400YS24-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with 64-tap resolution per channel, SPI serial interface, nonvolatile wiper position storage, and 2.7V–5.5V system supply operation. It integrates four independent 10kΩ end-to-end resistor arrays, each with 40Ω typical wiper resistance at 5V and ±1µA standby current, enabling precision analog control in voltage divider, gain-setting, and offset adjustment circuits.

For engineers reviewing the X9400YS24-2.7T1 datasheet, X9400YS24-2.7T1 pinout, X9400YS24-2.7T1 application, or X9400YS24-2.7T1 equivalent, key selection considerations include its 24-pin SOIC package, -40°C to +85°C industrial temperature range, dual analog supply capability (±5.5V), SPI-compatible timing (2MHz max), and hardware write protection via WP pin.

Technical Context

The X9400YS24-2.7T1 implements four independent 63-segment resistor arrays with CMOS-switched wiper terminals, each controlled by a volatile 6-bit Wiper Counter Register (WCR) and backed by four 6-bit nonvolatile Data Registers (DR0–DR3). Power-on recall loads DR0 into the WCR for deterministic startup behavior.

Its SPI interface supports read/write of WCR and DR registers, global or per-pot transfer between registers, and real-time increment/decrement operations with sub-microsecond wiper response (tWRID = 450ns). Hardware write protection (WP) disables nonvolatile writes, while HOLD enables serial communication pause without reset.

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 X9400YS24-2.7T1 uniquely supports true bipolar analog signal paths via dedicated V+/V− pins and delivers lower wiper resistance (40Ω typ), making it optimal for precision voltage divider and low-distortion audio applications requiring wide dynamic range.

Availability

X9400YS24-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trimming, audio level control, and precision op-amp gain/offset adjustment requiring stable component supply and long-term calibration integrity.

Supply support for X9400YS24-2.7T1 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 provider, now part of Renesas Electronics, delivering high-reliability solutions for industrial, infrastructure, and automotive markets.

The X9400 family was designed specifically for digitally programmable analog control in systems requiring nonvolatile wiper storage, low noise, and bipolar signal compatibility - targeting calibration-critical applications in test equipment, medical devices, and industrial automation.

FAQ

What is the maximum SPI clock frequency supported by the X9400YS24-2.7T1?

The X9400YS24-2.7T1 supports a maximum SPI clock frequency of 2.0 MHz, as specified in its AC timing parameters. This allows fast register access and wiper updates while maintaining robust noise immunity. All SPI operations-including read, write, transfer, and increment/decrement-function reliably within this limit, and timing margins remain compliant down to 2.7V VCC.

Does the X9400YS24-2.7T1 support true bipolar analog operation?

Yes, the X9400YS24-2.7T1 supports true bipolar analog operation via dedicated V+ and V− pins, rated from −5.5V to −2.7V and +2.7V to +5.5V respectively. This enables full ±5.5V signal swing across each potentiometer's VH/VL terminals, making it suitable for op-amp circuits requiring symmetric rail-to-rail analog control without level-shifting circuitry.

How does power-on wiper recall work in the X9400YS24-2.7T1?

On power-up, the X9400YS24-2.7T1 automatically loads the contents of Data Register 0 (DR0) into the corresponding Wiper Counter Register (WCR) for each of the four potentiometers. This occurs after VCC, V+, and V− reach stable levels and ensures deterministic startup behavior without host intervention - critical for fail-safe analog control in unattended systems.

Can the X9400YS24-2.7T1 be used with a 3.3V microcontroller SPI interface?

Yes, the X9400YS24-2.7T1 is fully compatible with 3.3V microcontrollers: its VCC range is 2.7V–5.5V, VIH is defined as VCC × 0.7 (≥2.31V at 3.3V), and VIL as VCC × 0.1 (≤0.33V). The SO output is push-pull and drives cleanly to 3.3V logic levels, and all timing parameters (tSU, tH, tV) are met at 3.3V operation per the datasheet.

What is the wiper resistance specification for the X9400YS24-2.7T1 and how does it affect performance?

The X9400YS24-2.7T1 has a typical wiper resistance of 40Ω at 5V and 100Ω at 3V, with a maximum of 250Ω across temperature and voltage. This low R_W minimizes gain error and THD in precision voltage divider and amplifier configurations - especially critical in high-impedance feedback networks where even 100Ω can introduce measurable error in 10kΩ-scale designs.