Renesas X9460KV14I-2.7

Overview

X9460KV14I-2.7 from Xicor is a dual-channel digitally controlled logarithmic potentiometer (XDCP) designed for stereo audio gain control, featuring two independent 32-tap log taper resistor arrays (33 kΩ each), ±2.7 V to ±5.5 V dual analog supply operation, -40°C to +85°C industrial temperature range, and zero-amplitude wiper switching to eliminate audio pops during volume transitions - deployed in DVD players and stereo amplifiers.

For engineers reviewing the X9460KV14I-2.7 datasheet, X9460KV14I-2.7 pinout, X9460KV14I-2.7 application, or X9460KV14I-2.7 equivalent, key selection considerations include I²C-compatible 2-wire interface timing (400 kHz max), mute-on-power-up behavior, -92 dB mute attenuation, -96 dB SNR, and TSSOP-14 package compatibility with space-constrained consumer audio PCB layouts.

Technical Context

The X9460KV14I-2.7 integrates two monolithic CMOS log-taper DCPs with independent or simultaneous wiper control via I²C-compatible serial interface. Each channel uses 31 polysilicon resistors and a 5-bit volatile Wiper Counter Register (WCR) decoded to select one of 32 taps - including mute position (tap 0) - with step sizes of -1 dB, -2 dB, -3 dB, and -4 dB.

Zero-amplitude wiper switching delays tap changes until audio signal crossing near zero volts, suppressing transient noise. The device supports four cascaded slave addresses (A1/A0), operates with separate digital (VCC/VSS) and bipolar analog (V+/V-) supplies, and resets to mute at power-up with <10 µs wiper response time after instruction issuance.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (V14), 4.3 mm × 3.0 mm footprint, 0.65 mm pitch, gull-wing leads - optimized for automated SMT assembly in compact consumer audio modules.

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-103E/ST, the X9460KV14I-2.7 uniquely combines dual log taper, zero-crossing switching, and I²C simplicity - making it optimal for consumer audio where click-free stereo volume control and compact layout are mandatory.

Availability

X9460KV14I-2.7 is available at Aetrix Electronics and suitable for DVD players, set-top boxes, stereo amplifiers, and portable audio products requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for X9460KV14I-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 ICs, acquired by Intersil in 2005 and later integrated into Renesas Electronics.

The X9460KV14I-2.7 belongs to Xicor's XDCP™ (eXternally Digitally Controlled Potentiometer) family, engineered specifically for high-fidelity, low-noise stereo audio volume control in consumer electronics with strict requirements for pop/click suppression and channel matching.

FAQ

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

The X9460KV14I-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 occurs regardless of prior state or I²C activity. The device requires stable VCC, V+, and V− supplies before wiper movement becomes active - with wiper response time under 10 µs after valid instruction receipt.

Does the X9460KV14I-2.7 support true bipolar audio signals?

Yes, the X9460KV14I-2.7 supports true bipolar operation via dedicated V+ (+2.7 V to +5.5 V) and V− (−2.7 V to −5.5 V) analog supplies. This enables AC-coupled audio signals centered at 0 V to pass through RH–RL resistor arrays without clipping, preserving signal symmetry and minimizing even-order distortion - critical for high-end line-level audio paths.

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

The X9460KV14I-2.7 monitors voltage across RH–RL terminals and delays wiper switching until the instantaneous audio signal amplitude falls below a threshold near zero volts. This prevents abrupt resistance changes during high-signal periods, eliminating audible pops and clicks. The feature is enabled/disabled via the ZD bit in the command byte and operates independently per channel.

Can the X9460KV14I-2.7 be used with a 3.3 V microcontroller I²C bus?

Yes, the X9460KV14I-2.7 accepts VCC from 2.7 V to 5.5 V and features VIH = 0.7×VCC and VIL = 0.1×VCC logic thresholds. When powered at 3.3 V, its SDA/SCL inputs are fully compatible with standard 3.3 V I²C outputs. External pull-ups to VCC (not 5 V) are required, and bus timing parameters (e.g., tSU:DAT = 500 ns) remain satisfied at 400 kHz.

What is the maximum audio bandwidth supported by the X9460KV14I-2.7?

The X9460KV14I-2.7 has a -3 dB cutoff frequency of 100 kHz, verified under typical conditions (VCC/V+/V− = ±5 V, TA = 25°C). This exceeds the 20 Hz–20 kHz audio band by 5×, ensuring flat frequency response and minimal phase shift across the entire audible spectrum - essential for high-resolution audio playback in DVD players and stereo amplifiers.