Renesas X9460KV14IZ-2.7

Overview

X9460KV14IZ-2.7 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 (–62 dB range + mute), zero-amplitude wiper switching, 2-wire I²C-compatible serial interface, ±2.7 V to ±5.5 V dual analog supply operation, and 14-lead TSSOP packaging.

For engineers reviewing the X9460KV14IZ-2.7 datasheet, X9460KV14IZ-2.7 pinout, X9460KV14IZ-2.7 application, or X9460KV14IZ-2.7 equivalent, key selection criteria include log taper accuracy (±0.1 dB channel matching), mute-on-power-up behavior, –92 dB mute attenuation, –96 dB SNR, and simultaneous/independent left/right wiper control via I²C with cascading support for up to four devices.

Technical Context

The X9460KV14IZ-2.7 integrates two monolithic CMOS log-taper resistor arrays-each with 31 polysilicon segments and 32 tap points-controlled by independent 5-bit volatile Wiper Counter Registers (WCRs). Wiper movement is synchronized to audio zero-crossing via dedicated hardware circuitry to eliminate pops and clicks.

It implements a full I²C slave protocol with device address pins A1/A0 supporting four unique slave addresses (01010xxR/W), supports three-byte read/write commands and real-time increment/decrement via SCL-triggered SDA level detection, and features separate digital (V_CC/V_SS) and bipolar analog (V+/V−) supply domains with strict ramp-rate compliance (0.2–50 V/ms).

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (V14), 4.3 mm × 5.1 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 MCP4641T-103I/ST, the X9460KV14IZ-2.7 uniquely delivers matched stereo log taper, hardware zero-crossing switching, bipolar analog supplies, and power-up mute - making it the only qualified solution for noise-critical consumer audio volume control.

Availability

X9460KV14IZ-2.7 is available at Aetrix Electronics and suitable for set-top box design, DVD player manufacturing, and stereo amplifier development requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature performance.

Supply support for X9460KV14IZ-2.7 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; its XDCP™ technology pioneered precision digital potentiometers for audio and instrumentation.

The X9460KV14IZ-2.7 belongs to Xicor's XDCP™ family, engineered specifically for high-fidelity stereo audio volume and gain control with zero-pop switching, log taper accuracy, and robust bipolar analog operation.

FAQ

What is the power-up behavior of the X9460KV14IZ-2.7?

The X9460KV14IZ-2.7 resets both wiper counter registers to tap 0 (mute position, –92 dB) at power-on, ensuring silent startup. This behavior is hardwired and requires no initialization sequence. The device remains in mute until the host MCU writes new wiper values or issues increment/decrement commands. This guarantees safe audio system boot across all valid V_CC, V+, and V− ramp conditions.

Does the X9460KV14IZ-2.7 support true bipolar audio signal paths?

Yes. The X9460KV14IZ-2.7 accepts independent V+ and V− analog supplies ranging from ±2.7 V to ±5.5 V, allowing direct connection of AC-coupled audio signals across RH–RL terminals without DC bias shift. Its wiper (RW) and terminal (RH/RL) pins operate fully within the V+ to V− range, enabling seamless integration into Class AB amplifier stages and other bipolar signal chains.

How does zero-amplitude wiper switching work in the X9460KV14IZ-2.7?

The X9460KV14IZ-2.7 contains dedicated analog circuitry that monitors voltage differential across RH and RL terminals. When a wiper move command is issued, the internal switch matrix delays activation until the instantaneous signal crosses zero volts - eliminating transients that cause audible pops. This function is enabled by default (ZD=1) and can be disabled via I²C command if needed for non-audio use cases.

Can multiple X9460KV14IZ-2.7 devices share the same I²C bus?

Yes. The X9460KV14IZ-2.7 supports up to four devices on one I²C bus using address pins A1 and A0 to configure unique 2-bit LSBs of the slave address (01010A1A0R/W). Each device responds only to its assigned address, enabling coordinated stereo control across multiple audio zones or channels without bus contention or additional GPIO overhead.

What is the maximum wiper current rating for the X9460KV14IZ-2.7?

The X9460KV14IZ-2.7 specifies a maximum wiper current (I_W) of ±3 mA under steady-state conditions. This rating applies to both RW-Left and RW-Right terminals simultaneously. Exceeding this limit risks resistor array degradation or increased THD+N. For typical line-level audio (≤1 V_rms into 10 kΩ+ loads), wiper current remains well below 100 µA, ensuring long-term reliability and specification compliance.