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