Renesas X9400YV24-2.7T1

Overview

X9400YV24-2.7T1 from Intersil is a quad digitally controlled potentiometer (XDCP™) with SPI interface, 64-tap resolution per channel, 10 kΩ end-to-end resistance, and 2.7V–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). Used in precision analog trimming, programmable gain control, and offset adjustment circuits requiring stable, low-power digital potentiometry.

For engineers reviewing the X9400YV24-2.7T1 datasheet, X9400YV24-2.7T1 pinout, X9400YV24-2.7T1 application, or X9400YV24-2.7T1 equivalent, this device supports SPI-based wiper position programming, power-on recall from DR0, and ±5V analog rail operation - critical for industrial sensor conditioning, programmable power supply feedback, and multi-channel calibration systems.

Technical Context

The X9400YV24-2.7T1 implements four independent 63-segment resistor arrays with CMOS switch-controlled wipers, each driven by a 6-bit volatile Wiper Counter Register (WCR). Each array supports three-terminal potentiometer or two-terminal variable resistor configurations with VH/RH, VL/RL, and VW/RW terminals.

SPI communication uses CS, SCK, SI, and SO pins with support for read/write WCR/DR, global transfer, increment/decrement, and status polling. Hardware write protection (WP) disables nonvolatile writes when low, and device addressing via A0/A1 allows up to four devices on one bus.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4 mm body width, Pb-free, RoHS compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with X9400YV24-2.7T1, AD5204BRUZ10 offers higher resolution but lacks bipolar analog support, while MCP42050-I/SL provides greater tap count but omits nonvolatile storage - making X9400YV24-2.7T1 uniquely suited for maintenance-free, wide-range analog tuning in industrial environments.

Availability

X9400YV24-2.7T1 is available at Aetrix Electronics and suitable for instrumentation calibration, programmable power supply feedback, and sensor signal conditioning requiring stable component supply, long-term calibration integrity, and RoHS-compliant packaging.

Supply support for X9400YV24-2.7T1 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 family was designed for digitally programmable analog trimming in harsh environments - emphasizing nonvolatile calibration storage, low-power operation, and robust SPI control for embedded test and measurement systems.

FAQ

What is the analog voltage range supported by the X9400YV24-2.7T1?

The X9400YV24-2.7T1 supports V+ from +2.7 V to +5.5 V and V− from −5.5 V to −2.7 V, enabling a total analog differential range of up to 11 V. This allows direct connection to bipolar op-amp stages and AC-coupled signal paths without external level-shifting circuitry. The X9400YV24-2.7T1 maintains specified performance across this full range when used within absolute maximum ratings.

Does the X9400YV24-2.7T1 retain wiper settings after power loss?

Yes - the X9400YV24-2.7T1 automatically loads the contents of Data Register 0 (DR0) into the Wiper Counter Register (WCR) on power-up. Each of the four potentiometers has its own DR0, and all DRs are nonvolatile with 100-year data retention. The X9400YV24-2.7T1 ensures deterministic analog behavior at startup without host intervention.

Can the X9400YV24-2.7T1 be used as a two-terminal variable resistor?

Yes - the X9400YV24-2.7T1 supports both three-terminal potentiometer (VH–VW–VL) and two-terminal variable resistor (VH–VW or VW–VL) configurations. In two-terminal mode, the unused terminal must be left unconnected or tied to the appropriate rail. The X9400YV24-2.7T1's 40 Ω typical wiper resistance ensures minimal series impedance impact in current-setting applications.

How does hardware write protection (WP) function on the X9400YV24-2.7T1?

When the WP pin is held LOW, the X9400YV24-2.7T1 blocks all nonvolatile write operations to its Data Registers (DR0–DR3), preventing accidental overwrites of calibrated values. SPI commands for writing to DRs are ignored, though volatile WCR updates and reads remain functional. The X9400YV24-2.7T1 resumes full write capability immediately upon WP returning HIGH.

What is the maximum SPI clock frequency supported by the X9400YV24-2.7T1?

The X9400YV24-2.7T1 supports an SPI clock frequency (fSCK) up to 2.0 MHz under recommended operating conditions. Timing parameters including tSU (50 ns setup), tH (50 ns hold), and tWH/tWL (200 ns high/low time) are guaranteed across the full temperature and voltage range. The X9400YV24-2.7T1 maintains reliable communication at this rate with standard 3.3 V or 5 V MCU SPI peripherals.