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LC78684E

Features: `MP3 Decoding Functions (MPEG audio standard [ISO/IEC 11172-3] layer 3) -Decodes to a digital audio signal MP3 data decoded by the CD-ROM decoder and outputs that audiosignal.-Supports all bit rates, including variable bit rate operation.-Supports the following sampling rates.MPEG1 (Fs =...

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SeekIC No. : 004392196 Detail

LC78684E: Features: `MP3 Decoding Functions (MPEG audio standard [ISO/IEC 11172-3] layer 3) -Decodes to a digital audio signal MP3 data decoded by the CD-ROM decoder and outputs that audiosignal.-Supports all...

LC78684E Data Sheet

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Part Number:
LC78684E
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`MP3 Decoding Functions (MPEG audio standard [ISO/IEC 11172-3] layer 3)
-Decodes to a digital audio signal MP3 data decoded by the CD-ROM decoder and outputs that audiosignal.
-Supports all bit rates, including variable bit rate operation.
-Supports the following sampling rates.
MPEG1 (Fs = 32 K, 44.1 K, 48 K)
MPEG2 (Fs = 16 K, 22.05 K, 24 K)
MPEG2.5 (Fs = 8 K, 11.025 K, 12 K)
-Can read out the MPEG header and ancillary data.
-Automatically mutes the signal on CRC errors using an MP3 CRC check function.
-External MPEG serial data input function supports memory card playback.
`CD-ROM Decoding Functions
-Supports CD-ROM modes 1 and 2 (forms 1 and 2)
-Faithfully reproduces data stored on CD-ROM discs using CD-ROM error correction functions.
-Header and sector management
-Supports playback speeds up to 4*.
-In addition to data buffering also supports C2 error flag buffering.
-Provides external serial output of decoded CD-ROM data.
`CD-DA Playback Functions (Shockproof support)
-Shockproof operation for about 180 seconds (compressed mode) when 64M DRAM is used.
-Shockproof function supports compressed, uncompressed, and data through modes.
-VCEC (variable speed) supports up to 4*-speed playback.
`Audio Signal Processing
-Serial audio signal output using LRCK, BCK, and DATA signals. (I²S format, either 16-bit or 20-bit precision PCM
output, data-slot supports 16-bit, 24-bit, and 32-bit modes)
`Digital bass boost function (4 modes), attenuator function, and muting (-, -12 dB)
-Provides a base clock (384 fs) output pin for use with external digital filters and D/A converters.
-DRAM Interface
-Supports the use of from 1M to 64M of external DRAM (EDO, 2CAS, 16-bit data bus memory)
-Supports allocation of a user area in DRAM during CD-ROM (MP3) playback. Continued from preceding page.
`Package and Power Supply Voltage Specifications
-Package: Sanyo QFP80 (14 * 14) (unit: mm)
-Supply voltage Internal power supply: 1.8 V (typical) I/O power supply: 3.3 V (typical) Analog system power supply:
   3.3 V (typical)


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Conditions
Ratings
Unit

Maximum supply voltage

VDD max

-0.3 to VSS - 4.0
V
Input voltage
VIN
-0.3 to VDD1 - 0.3
V
Output voltage
VOUT
-0.3 to VDD1 - 0.3
V
Allowable power dissipation
Pd max
400
mW
Operating temperature
Topr
-30 to -75
°C
Storage temperature
Tstg
-40 to -125
°C



Description

The LC78684E integrates, on a single chip, CD-ROM signal-processing functions, MP3 signal-processing functions, and CD-DA shockproof signal-processing functions. The LC78684E achieves significant power savings by implementing signal-processing functions using hardwired structures.

A CD player that supports playback of MPEG audio (MP3) recorded on CD media as well as CD-DA shockproof playback can be implemented by combining this IC with a CD DSP, DRAM, and audio D/A converter, and other circuits.




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