Renesas X9460KV14IT1

Overview

X9460KV14IT1 from Xicor is a dual-channel digitally controlled logarithmic potentiometer (XDCP) designed for stereo audio gain/volume control. It integrates two independent 32-tap log taper resistor arrays (33kΩ each), supports ±2.7V to ±5.5V dual analog supplies, delivers -92dB mute and -96dB SNR, and operates from -40°C to +85°C in a 14-lead TSSOP package - used in DVD players, set-top boxes, and portable audio amplifiers.

For engineers reviewing the X9460KV14IT1 datasheet, X9460KV14IT1 pinout, X9460KV14IT1 application, or X9460KV14IT1 equivalent, key selection considerations include zero-amplitude wiper switching for pop-free volume transitions, I²C-compatible 2-wire interface with cascading address support (A1/A0), dual-channel simultaneous/independent control, and verified audio performance metrics including -102dB crosstalk rejection and 100kHz -3dB bandwidth.

Technical Context

The X9460KV14IT1 implements two independent 31-segment polysilicon log resistor arrays, each controlled by a volatile 5-bit Wiper Counter Register (WCR) that resets to mute (tap 0) at power-up. Its zero-amplitude wiper switching circuit delays tap changes until signal zero-crossing, eliminating audible pops during volume adjustment.

Communication uses a standard I²C-compatible 2-wire serial interface (SCL/SDA) with slave byte address 01010A1A0R/W, supporting read/write of individual or both WCRs, plus real-time increment/decrement via SCL clocked SDA level detection. Each channel offers discrete step sizes of -1dB (11 steps), -2dB (10), -3dB (5), -4dB (4), and mute (1), totaling 32 positions per pot.

Key Specifications

Pinout & Package

Package: 14-lead TSSOP (V14), 4.3mm × 3.0mm body, 0.65mm 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-100+ and MCP4641-103E/ST, the X9460KV14IT1 uniquely delivers dual log-taper channels with zero-crossing switching, -92dB mute, and -102dB crosstalk - making it the only option qualified for high-fidelity consumer audio volume control where channel matching and pop suppression are mandatory.

Availability

X9460KV14IT1 is available at Aetrix Electronics and suitable for DVD players, set-top boxes, and portable audio products requiring stable component supply, long-term lifecycle support, and industrial-grade temperature operation.

Supply support for X9460KV14IT1 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 X9460KV14IT1 belongs to Xicor's XDCP™ (eXternally Digitally Controlled Potentiometer) product line, engineered specifically for high-performance audio volume and balance control in consumer electronics with emphasis on low distortion, channel matching, and zero-pop operation.

FAQ

What is the power-up behavior of the X9460KV14IT1?

The X9460KV14IT1 resets both wiper counter registers to tap position 0 (mute) at power-up, ensuring -92dB attenuation on both channels before any host communication. This behavior is hardwired and occurs regardless of VCC, V+, or V− ramp sequence, provided supply voltages meet recommended operating conditions. The mute state remains active until the host issues a write command to either WCR.

Does the X9460KV14IT1 support simultaneous left and right channel adjustment?

Yes, the X9460KV14IT1 supports simultaneous left and right channel adjustment via three methods: (1) Write identical values to both WCRs using the "Write Both Wiper Counters" command; (2) Use Increment/Decrement command with LT=1 and RT=1 bits set; (3) Issue separate commands in rapid succession. All methods preserve channel synchronization within 10µs wiper response time.

What is the function of the A1 and A0 pins on the X9460KV14IT1?

The A1 and A0 pins on the X9460KV14IT1 define the two least-significant bits of the 8-bit I²C slave address (01010A1A0R/W), allowing up to four X9460KV14IT1 devices to share a single 2-wire bus. These pins can be tied to VSS, VCC, or driven actively; floating pins are internally pulled to ground, defaulting the address to 0x50 (write) / 0x51 (read).

How does zero-amplitude wiper switching work in the X9460KV14IT1?

The X9460KV14IT1 monitors voltage across RH–RL terminals and delays wiper switching until the instantaneous audio signal crosses zero volts. This circuit is enabled by the ZD bit in the command byte; when ZD=1, transitions occur only near zero-crossing, eliminating transients that cause audible pops. When disabled (ZD=0), wipers move immediately upon command execution.

What are the absolute maximum ratings for analog supply pins on the X9460KV14IT1?

The X9460KV14IT1 specifies absolute maximum ratings of V+ = +6V and V− = -6V relative to VSS, with (V+) − (V−) ≤ 12V. Voltages on RH, RL, and RW pins must remain strictly between V− and V+, and VCC must be ≥ RH/RL/RW. Exceeding these limits risks permanent damage; operation outside recommended ranges (±2.7V to ±5.5V) degrades audio performance and reliability.