1FEATURES

23· One-Chip Digital Audio Interface Receiver

(DIR) Including Low-Jitter Clock-Recovery

System

· Compliant With Digital Audio Interface

Standards: IEC60958 (former IEC958), JEITA

CPR-1205 (former EIAJ CP-1201, CP-340),

AES3, EBU tech3250

· Clock Recovery and Data Decode From

Biphase Input Signal, Generally Called S/PDIF,

EIAJ CP-1201, IEC60958, AES/EBU

· Biphase Input Signal Sampling Frequency (fS)

Range: 28 kHz to 108 kHz

· Low-Jitter Recovered System Clock: 50 ps

· Jitter Tolerance Compliant With IEC60958-3

· Selectable Recovered System Clock: 128 fS,

256 fS, 384 fS, 512 fS

· Serial Audio Data Output Formats: 24-Bit I2S;

MSB-First, 24-Bit Left-Justified; MSB-First 16-,

24-Bit Right-Justified

· User Data, Channel-Status Data Outputs

Synchronized With Decoded Serial Audio Data

· No External Clock Required for Decode

· Includes Actual Sampling Frequency

Calculator (Needs External 24.576-MHz Clock)

· Function Control: Parallel (Hardware)

· Functions Similar and Pin Assignments

Equivalent to Those of DIR1703

· Single Power Supply: 3.3 V (2.7 V to 3.6 V)

· Wide Operating Temperature Range: –40°C to

85°C

· 5 V-Tolerant Digital Inputs

· Package: 28-pin TSSOP, Pin Pitch: 0,65 mm

APPLICATIONS

· Car Audio Head Units

· Car Audio External Amplifiers

DESCRIPTION

The DIR9001-Q1 is a digital audio interface receiver

that can receive a 28-kHz to 108-kHz sampling-

frequency, 24-bit-data-word, biphase-encoded signal.

The DIR9001-Q1 complies with IEC60958-3, JEITA

CPR-1205 (Revised version of EIAJ CP-1201), AES3,

EBUtech3250, and it can be used in various applications that require a digital audio interface.

The DIR9001-Q1 supports many output system clock

and output data formats and can be used flexibly in many application systems. As the all functions which

the DIR9001-Q1 provides can be controlled directly

through control pins, it can be used easily in an

application system that does not have a

microcontroller. Also, as dedicated pins are provided for the channel-status bit and user-data bit,

processing of their information can be easily

accomplished by connecting with a microcontroller,

DSP, etc.

The DIR9001-Q1 does not require an external clock

source or resonator for decode operation if the

internal actual-sampling-frequency calculator is not

used. Therefore, it is possible to reduce the cost of a

system.

The operating temperature range of the DIR9001-Q1

is specified as –40°C to 85°C, which makes it suitable for automotive applications.