1FEATURES

234• Two-Channel Asynchronous Sample Rate

Converter (SRC)

– Dynamic Range with –60dB Input (A-

Weighted): 144dB typical

– Total Harmonic Distortion and Noise

(THD+N) with Full-Scale Input: –140dB

typical

– Supports Audio Input and Output Data

Word Lengths Up to 24 Bits

– Supports Input and Output Sampling

Frequencies Up to 216kHz

– Automatic Detection of the Input-to-Output

Sampling Ratio

– Wide Input-to-Output Conversion Range:

16:1 to 1:16 Continuous

– Excellent Jitter Attenuation Characteristics

– Digital De-Emphasis Filtering for 32kHz,

44.1kHz, and 48kHz Input Sampling Rates

– Digital Output Attenuation and Mute

Functions

– Output Word Length Reduction

– Status Registers and Interrupt Generation

for Sampling Ratio and Ready Flags

• Digital Audio Interface Transmitter (DIT)

– Supports Sampling Rates Up to 216kHz

– Includes Differential Line Driver and

CMOS Buffered Outputs

– Block-Sized Data Buffers for Both Channel

Status and User Data

– Status Registers and Interrupt Generation

for Flag and Error Conditions

• User-Selectable Serial Host Interface: SPI or

Philips I2C™

– Provides Access to On-Chip Registers and

Data Buffers

• Digital Audio Interface Receiver (DIR)

– PLL Lock Range Includes Sampling Rates

from 20kHz to 216kHz

– Includes Four Differential Input Line

Receivers and an Input Multiplexer

– Bypass Multiplexer Routes Line Receiver

Outputs to Line Driver and Buffer Outputs

– Block-Sized Data Buffers for Both Channel

Status and User Data

– Automatic Detection of Non-PCM Audio

Streams (DTS CD/LD and IEC 61937

formats)

– Audio CD Q-Channel Sub-Code Decoding

and Data Buffer

– Status Registers and Interrupt Generation

for Flag and Error Conditions

– Low Jitter Recovered Clock Output

• Two Audio Serial Ports (Ports A and B)

– Synchronous Serial Interface to External

Signal Processors, Data Converters, and

Logic

– Slave or Master Mode Operation with

Sampling Rates up to 216kHz

– Supports Left-Justified, Right-Justified, and

Philips I2S™ Data Formats

– Supports Audio Data Word Lengths Up to

24 Bits

• Four General-Purpose Digital Outputs

– Multifunction Programmable Via Control

Registers

• Extensive Power-Down Support

– Functional Blocks May Be Disabled

Individually When Not In Use

• Operates From +1.8V Core and +3.3V I/O

Power Supplies

• Packages:

– QFN-40

– Small TQFP-48 Package, Compatible with

the SRC4382 and DIX4192

APPLICATIONS

• DIGITAL AUDIO RECORDERS AND

MIXING DESKS

• DIGITAL AUDIO INTERFACES FOR

COMPUTERS

• DIGITAL AUDIO ROUTERS AND

DISTRIBUTION SYSTEMS

• BROADCAST STUDIO EQUIPMENT

• DVD/CD RECORDERS

• SURROUND SOUND DECODERS AND

A/V RECEIVERS

• CAR AUDIO SYSTEMS

DESCRIPTION

The SRC4392 is a highly-integrated CMOS device

designed for use in professional and broadcast digital

audio systems. The SRC4392 combines a high-

performance, two-channel, asynchronous sample rate

converter (SRC) with a digital audio interface receiver

(DIR) and transmitter (DIT), two audio serial ports,

and flexible distribution logic for interconnection of the

function block data and clocks.

The DIR and DIT are compatible with the AES3,

S/PDIF, IEC 60958, and EIAJ CP-1201 interface

standards. The audio serial ports, DIT, and SRC may

be operated at sampling rates up to 216kHz. The DIR

lock range includes sampling rates from 20kHz to

216kHz.

The SRC4392 is configured using on-chip control

registers and data buffers, which are accessed

through either a 4-wire serial peripheral interface

(SPI) port, or a 2-wire Philips I2C bus interface. Status registers provide access to a variety of flag

and error bits, which are derived from the various

function blocks. An open drain interrupt output pin is

provided, and is supported by flexible interrupt

reporting and mask options via control register

settings. A master reset input pin is provided for

initialization by a host processor or supervisory

functions.

The SRC4392 requires a +1.8V core logic supply, in

addition to a +3.3V supply for powering portions of

the DIR, DIT, and line driver and receiver functions. A

separate logic I/O supply supports operation from

+1.65V to +3.6V, providing compatibility with low

voltage logic interfaces typically found on digital

signal processors and programmable logic devices.

The SRC4392 is available in a QFN-40 and a leadfree,

TQFP-48 package. The TQFN-48 is pin- and

register-compatible with the Texas Instruments

SRC4382 and DIX4192 products.