Renesas X9408WV24ZT1

Overview

X9408WV24ZT1 from Intersil (now Renesas) is a quad-channel digitally controlled potentiometer (XDCP™) implemented with 63-resistor-segment arrays per channel, 2-wire I²C-compatible interface, nonvolatile data registers, and ±5.5V analog supply capability. It functions as four independent 10kΩ end-to-end digital potentiometers in a single 24-lead TSSOP package, used for precision gain/offset trimming in audio line drivers and sensor signal conditioning circuits.

For engineers reviewing the X9408WV24ZT1 datasheet, X9408WV24ZT1 pinout, X9408WV24ZT1 application, or X9408WV24ZT1 equivalent, key selection considerations include its 64-tap resolution, 40Ω typical wiper resistance at 5V, hardware write-protect (WP) pin, dual-supply analog operation (V+/V−), and Pb-free RoHS-compliant TSSOP packaging.

Technical Context

The X9408WV24ZT1 integrates four independent XDCP channels sharing a single 2-wire bus interface with device address inputs A0–A3, supporting up to 16 devices on one bus. Each channel features a volatile 6-bit Wiper Counter Register (WCR) and four nonvolatile 6-bit Data Registers (DR0–DR3), with DR0 automatically loaded to WCR at power-up.

Its analog section operates from V+ = +2.7V to +5.5V and V− = −2.7V to −5.5V, enabling true bipolar signal handling. Wiper position is updated via serial commands (Read/Write WCR, Read/Write DR, XFR between registers) or real-time increment/decrement mode synchronized to SCL edges.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (4.4mm width), Pb-free (RoHS compliant), rated for 0°C to +70°C operation.

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/SL, the X9408WV24ZT1 uniquely supports true bipolar analog signal routing via separate V+/V− pins and includes hardware write protection-critical for industrial calibration integrity where firmware-level safeguards may be insufficient.

Availability

X9408WV24ZT1 is available at Aetrix Electronics and suitable for audio equipment manufacturing, sensor module calibration, programmable filter design, and industrial DAC scaling applications requiring stable component supply and long-term calibration retention.

Supply support for X9408WV24ZT1 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

Renesas Electronics (formerly Intersil) is a global semiconductor leader specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The X9408 product line was designed for precision analog parameter adjustment in systems requiring nonvolatile calibration storage, multi-channel synchronization, and robust bipolar signal handling-targeting test equipment, medical instrumentation, and industrial control.

FAQ

What is the absolute maximum voltage rating for the analog terminals (VH/VL/VW) of the X9408WV24ZT1?

The X9408WV24ZT1 specifies that any VH/RH, VL/RL, or VW/RW pin must remain within the range V− to V+. Given its V− = −5.5V and V+ = +5.5V ratings, the absolute maximum voltage on these analog terminals is −5.5V to +5.5V. Exceeding this range risks latch-up or permanent damage, even if VCC remains within limits. This constraint applies regardless of whether the device is actively communicating or in standby mode.

Does the X9408WV24ZT1 support true I²C compliance, including clock stretching and multi-master arbitration?

The X9408WV24ZT1 implements a 2-wire serial interface compatible with I²C protocol conventions-including START/STOP conditions, ACK/NACK signaling, and 7-bit addressing-but does not support clock stretching or multi-master arbitration. It operates strictly as a slave device with fixed timing parameters (e.g., tHIGH ≥ 600ns). Host controllers must adhere to the specified AC timing limits in the datasheet; violations may cause communication failures or register corruption.

How does power-up sequencing affect wiper position recall in the X9408WV24ZT1?

Correct wiper position recall in the X9408WV24ZT1 depends on strict power-up order: V− must be applied first, followed by VCC and V+, and finally analog pins (VH/VL/VW). If analog pins receive voltage before V+ or V− stabilizes, or if VCC ramp rate exceeds 50 V/msec, DR0-to-WCR loading may fail. Additionally, VCC must drop below 0.1V for >1 second before re-powering to ensure reliable recall-glitches or incomplete discharge prevent proper initialization of the WCR.

Can the X9408WV24ZT1 be used with a single 3.3V supply, and what limitations apply?

Yes, the X9408WV24ZT1 supports VCC = 2.7V to 5.5V, so 3.3V is valid for digital operation. However, analog performance is constrained: V+ and V− must still be supplied within their respective ±2.7V to ±5.5V ranges. With only a 3.3V system supply, generating compliant V+/V− rails requires external charge pumps or DC-DC converters. The 10kΩ end-to-end resistance and 40Ω wiper resistance values remain unchanged, but noise and linearity specs are characterized at ±5V analog bias.

What is the function of the WP pin during nonvolatile write operations in the X9408WV24ZT1?

The WP (Write Protect) pin on the X9408WV24ZT1 is a hardware-level safeguard: when held LOW, it disables all nonvolatile writes to the four Data Registers (DR0–DR3), preventing accidental overwrites of calibrated values. It does not affect volatile WCR updates or read operations. During an active nonvolatile write (e.g., XFR WCR→DR), pulling WP low mid-operation halts the internal EEPROM cycle-requiring a new command to resume. This feature ensures calibration integrity in environments where software faults or EMI could corrupt memory.