General Description

The CS8405A is a monolithic CMOS device which encodes and transmits audio data according to the AES3, IEC60958, S/PDIF, or EIAJ CP1201. The CS8405A accepts audio and digital data, which is then multiplexed, encoded, and driven onto a cable.

The audio data is input through a configurable, 3-wire input port. The channel status and user bit data are input through an SPI or I²C microcontroller port, and may be assembled in block-sized buffers. For systems with no microcontroller, a standalone mode allows direct access to channel status and user bit data pins.

Target applications include A/V Receivers, CD-R, DVD receivers, digital mixing consoles, effects processors, set-top boxes, and computer or automotive audio systems.

Features

● Complete EIAJ CP1201, IEC-60958, AES3,

S/PDIF-compatible Transmitter

● +5.0 V Digital Supply (VD+)

● +3.3 V or 5.0 V Digital Interface (VL+)

● On-chip channel status and user bit buffer

memories allow block-sized updates.

● Flexible 3-wire Serial Digital Audio Input Port

● Up to 96 kHz Frame Rate

● Microcontroller Write Access to Channel

Status and User Bit Data

● On-chip Differential Line Driver

● Generates CRC Codes and Parity Bits

● Standalone Mode Allows use Without a

Microcontroller