CS493263-CLZ Circuito Integrato Cirrus Logic

CS493263-CLZ multistandard audio decoder 

Key technical specifications of the Cirrus Logic CS493263‑CLZ (CS4932x family), a multistandard audio decoder used in A/V receivers and DVD players:

Functions/codecs

• Multistandard decoder in a dedicated DSP.
• Typically: Dolby Digital (AC‑3) 5.1, Dolby Pro Logic/Pro Logic II, MPEG‑1/2 Layer II; exact codec availability depends on the variant/licence fused into ROM.
• Note: the 493263 often does not include DTS; check the board documentation or the variant’s specific datasheet.

Formats and audio I/O

• Typical sampling rates: 32/44.1/48 kHz (PCM outputs up to 6 channels at 24‑bit); stereo downmix supported.
• Serial audio interfaces: I²S/TDM ports for PCM inputs/outputs to an external S/PDIF receiver and multichannel DAC.
• The S/PDIF input is not integrated: an external receiver is used (e.g., CS8414/CS8416).

Control and system

• Host control interface: I²C (2‑wire) and/or SPI (depending on firmware configuration).
• Typical reference clock: 27 MHz (DVD environments); also supports frequencies tied to the 48 kHz family (e.g., 12.288/24.576 MHz), depending on design.
• Internal memory: ROM with algorithms and internal RAM for buffering/post‑processing; does not require external SDRAM.
• Dedicated Reset/IRQ; MCLK, LRCK/BCLK/SDIN/SDOUT pins for the serial audio ports.

Electrical, package, status

• Power supply: typically 3.3 V (separate digital/analogue domains per reference layout).
• Word length: up to 24‑bit on the serial ports.
• Package: 100‑pin LQFP/TQFP. Suffix ‑CLZ = RoHS/lead‑free, commercial grade.
• Status: EOL/obsolete; there are no modern pin‑compatible drop‑ins. CS49326x variants are not always interchangeable due to ROM/licence differences.