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LC78685VLC78685V
Clock
Generator
WMA
Decoder
Input
Buffer
Main
Memory
Audio
Output
CKIN
LRCKO
BCKO
DATAO
CMIDOUT
CMIDIN
CL
CE
STRDY
CKOUT
DEMAND
ZCSWMA
STCKIN
STDATIN
LRIN
BCKIN
DATAIN
RESB
TEST
MICOM I/F
19 Car Audio 20 Car Audio
LA2351MLA2351M
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
3.3
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
3.3
µ
F
0.1
µ
F
0.1
µ
F
0.1
µ
F
V
CC
V
CC
V
CC
V
CC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
30 29 28 27 26 25 24 23 22 21 20
19 18 17 16
3.3V
OUT PUT
DATA OUT
COMP
GND
33k
Ω
330k
Ω
330k
Ω
2.2k
Ω
2.2k
Ω
GND
OUT-OFF
CONTROL
COMP
BIAS
V
CC
TXI0
External DAC
TXI1
DAC
LPF
Noise
Filter
TXI2
RADO
TXEN
Comparater
Driver
Amp
Receiver Amp
Conditional
Product
Conditional
Product
■ WMA (Windows Media Audio) decoding functions
◆Supports version 8
◆Bit rates: 32 to 192 kbps
◆Sampling frequencies: 22.05 kHz to 48 kHz
◆Header information readout function
◆Automatic framing error recovery function
■ Audio data functions
◆WMA playback mode
: Serial audio signal output using the LRCK, BCK, and DATA signals
(Output supports the I
2
S format, 16- or 20-bit PCM output precision, 16-, 24-, and 32-bit output modes selectable for
data-slot output)
: Attenuator and muting (-∞, -12 dB) functions
: Base clock (384 Fs) output for external digital filters and D/A converter
■ Audio data other than WMA
◆The system clock and audio data input to the CKIN, LRCKIN, BCKIN, and DATAIN pins is output directly without
change from the CKOUT, LRCKO, BCKO, and DATA pins. That is, CD-DA and MP3 playback data from the LC78684 is directly
output to the D/A converter.
■ Supply voltages
◆Internal: 1.8 V
◆I/O: 3.3 V
■ Package: SSOP24 (275 mil)
WMA DecoderWMA Decoder
The LC78685V is a WMA decoder IC. This IC is implemented using a dedicated hard wired circuit structure
to achieve low power consumption. Various format (CD-DA, MP3, and WMA) audio data recorded on CDs can
be played back by adding this IC to a system structure consisting of a CD player signal-processing IC and a
CD-MP3 IC (such as the LC78684).
The LC78685V makes it easy to implement CD players that provide multiformat decoding functions.
New
product
New
product
New
product
Features
Features
Overview
Overview
: Use of conditional products requires
consultation with a SANYO representative
prior to the use of the device.
❋
: WMA: Windows Media Audio
Windows Media is a registered trademark of Microsoft Corporation
in the US and other countries.
❋
❋
Block Diagram
Block Diagram
7.5 Mbps Automotive LAN Transceiver7.5 Mbps Automotive LAN Transceiver
The LA2351M is a low-noise transceiver IC for automotive LANs.
Functions
■ Accepts either 3-bit digital or stepped waveform signals as the input signal.
If a 3-bit digital signal cannot be used due to EMI and wiring issues, provide an R-2R ladder near the protocol chip and connect the
D/A converted signal to the low-pass filter input.
■ A 5 Mbps or 7.5 Mbps automotive LAN can be implemented by combining the LA2351M with an automotive LAN
protocol IC (ARCNET controller TMC20040C series device).
■ The low-pass filter required for adjustment is built in
■ Supports low-noise data communication
■ Package: MFP30SD (375 mil)
■ Transmitter block
◆A/D converter (3 bits)
◆Low-pass filter (for EMI prevention)
◆Output driver
■ Receiver block
◆Reception amplifier
◆Noise rejection low-pass filter (for the received signal)
◆Comparator (for waveshaping)