Renesas X9460KV14I-2.7T1

Overview

X9460KV14I-2.7T1 from Xicor is a dual-channel digitally controlled logarithmic potentiometer (XDCP) designed for stereo audio gain/volume control, featuring two independent 32-tap log arrays (0 to –62 dB range + mute), zero-amplitude wiper switching, and 2-wire I²C-compatible serial interface. It operates from dual analog supplies (±2.7 V to ±5.5 V), supports industrial temperature range (–40°C to +85°C), and is housed in a 14-lead TSSOP package.

For engineers reviewing the X9460KV14I-2.7T1 datasheet, X9460KV14I-2.7T1 pinout, X9460KV14I-2.7T1 application, or X9460KV14I-2.7T1 equivalent, key selection criteria include log taper accuracy (±0.1 dB channel matching), mute-on-power-up behavior, –92 dB mute attenuation, SNR of –96 dB, and compatibility with cascaded I²C bus systems using A0/A1 address select.

Technical Context

The X9460KV14I-2.7T1 integrates two monolithic CMOS log-taper resistor arrays-each with 31 polysilicon segments and 32 wiper positions-controlled via a dedicated 2-wire serial interface compliant with I²C timing (400 kHz max clock). Its zero-amplitude wiper switching circuit delays tap changes until audio signal zero-crossing, eliminating pops and clicks during volume transitions.

Each potentiometer has independently addressable wiper counter registers (5-bit volatile), supporting simultaneous or individual left/right channel control via command byte (ZD/RT/LT bits), increment/decrement mode, or direct write/read operations. The device uses separate analog (V+/V−) and digital (VCC/VSS) supply domains to isolate noise-sensitive audio paths from digital logic.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (V14), 4.4 mm × 3.0 mm body, 0.65 mm pitch, gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel audio log potentiometer applications.

Compared with DS1802Z-10+ and MCP4641-103E/ST, the X9460KV14I-2.7T1 uniquely delivers synchronized dual-channel log taper, hardware-enforced zero-crossing switching, and –92 dB mute-all in a single TSSOP-14 package-making it the only option qualified for high-end stereo volume control where audio integrity is non-negotiable.

Availability

X9460KV14I-2.7T1 is available at Aetrix Electronics and suitable for set-top boxes, DVD players, stereo amplifiers, and portable audio products requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.

Supply support for X9460KV14I-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

Xicor, Inc. was a fabless semiconductor company specializing in nonvolatile memory and digitally controlled analog products before its acquisition by Intersil in 2005. Known for pioneering XDCP™ technology, it delivered high-precision, low-noise programmable analog ICs.

The X9460KV14I-2.7T1 belongs to Xicor's XDCP™ family of digitally controlled potentiometers, engineered specifically for high-fidelity audio applications demanding log taper accuracy, channel matching, and artifact-free volume control in consumer and professional electronics.

FAQ

What is the power-up behavior of the X9460KV14I-2.7T1?

The X9460KV14I-2.7T1 powers up with both wipers reset to tap 0-the mute position-delivering –92 dB attenuation. This ensures no audio transient occurs at system startup. The reset is automatic and does not require external initialization; the wiper counter registers (WCR) are volatile and lose state upon power removal. This behavior is hardwired and applies regardless of VCC ramp rate within specification (0.2–50 V/ms).

Does the X9460KV14I-2.7T1 support true bipolar audio operation?

Yes, the X9460KV14I-2.7T1 supports true bipolar operation via separate V+ and V− analog supply pins, rated from ±2.7 V to ±5.5 V. This allows AC-coupled audio signals to swing symmetrically around ground without clipping, unlike unipolar potentiometers constrained to 0–VCC rails. RH/RL/RW terminals are fully referenced to these analog supplies, enabling distortion-free handling of differential or single-ended bipolar waveforms.

How does zero-amplitude wiper switching work in the X9460KV14I-2.7T1?

The X9460KV14I-2.7T1 monitors voltage across RH and RL terminals in real time. When a wiper movement command is issued, the internal zero-detection circuit delays the switch activation until the instantaneous audio signal crosses zero volts. This eliminates discontinuities in the output waveform, preventing audible clicks or pops. The feature is enabled/disabled via the ZD bit in the command byte and operates independently per channel.

Can multiple X9460KV14I-2.7T1 devices share the same I²C bus?

Yes, up to four X9460KV14I-2.7T1 devices can be cascaded on a single I²C bus using the A0 and A1 address pins to configure unique 2-bit LSBs of the slave address (01010A1A0). Each device responds only to commands matching its assigned address, allowing independent or synchronized control of multiple stereo channels without bus contention or additional hardware.

What is the end-to-end resistance tolerance and temperature coefficient of the X9460KV14I-2.7T1?

The X9460KV14I-2.7T1 has a nominal end-to-end resistance of 33 kΩ per channel with a tolerance of ±20% (K suffix). Its temperature coefficient is –300 ppm/°C, measured across the industrial range (–40°C to +85°C). This tight TCR ensures minimal drift in gain setting over temperature-critical for factory-calibrated audio systems where long-term stability is required without recalibration.