LC78631E Datasheet PDF - Sanyo Semicon Device
| Part Number | LC78631E | |
| Description | Compact Disk Player DSP | |
| Manufacturers | Sanyo Semicon Device | |
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Ordering number : EN 5342
CMOS LSI
LC78631E
Compact Disk Player DSP
Overview
The LC78631E is a compact disc D/A signal-processing
LSI for CD-ROM drives that provides a variable clock
error correction (VCEC) mode. The LC78631E
demodulates the EFM signal from the optical pickup and
performs de-interleaving, error detection, error correction,
digital filtering, and other processing. The LC78631E
includes an on-chip 1-bit D/A converter, and executes
commands sent from a control microprocessor.
Features
• VCEC support
• Built-in PLL circuit for EFM detection (supports 4×
playback)
• Built-in PLL for variable pitch playback (±13%)
• 18KB RAM on chip
• Error detection and correction (corrects two errors in C1
and four errors in C2)
• Frame jitter margin: ±8 frames
• Frame synchronization signal detection, protection, and
insertion
• Dual interpolation adopted in the interpolation circuit.
• EFM data demodulation
• Subcode demodulation
• Zero-cross muting adopted
• Servo command interface
• 2fs digital filter
• Digital de-emphasis
• Built-in independent left- and right-channel digital
attenuators (239 attenuation steps)
• Supports the bilingual function
• Left/right swap function
• Built-in 1-bit D/A converter (third-order ∆∑ noise
shaper, PWM output)
• Built-in digital output circuit
• CLV servo
• Arbitrary track jumping (of up to 255 tracks)
• Variable sled voltage (four levels)
• Six extended I/O ports and 2 extended output ports
• Built-in oscillator circuit using an external 16.9344 MHz
or 33.8688 MHz (for 4× playback) element
• Supply voltage: 3.6 to 5.5 V (4.75 to 5.5 V for 4×
playback mode)
Package Dimensions
unit: mm
3174-QFP80E
[LC78631E]
SANYO: QFP80E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
62096HA (OT) No. 5342-1/34
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LC78631E
D/A Converter Analog Characteristics at Ta = 25°C, VDD = 5 V, VSS = 0 V
Parameter
Total harmonic distortion
Dynamic range
Signal-to-noise ratio
Crosstalk
Symbol
THD + N
DR
S/N
CT
Conditions
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input,
using a 20-kHz low-pass filter (AD725D built in)
LCHP, LCHN, RCHP, RCHN; 1 kHz: –60 dB input, using
the 20-kHz low-pass filter (A filter (AD725D built in))
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input, using
the 20-kHz low-pass filter (A filter (AD725D built in))
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input,
using a 20-kHz low-pass filter (AD725D built in)
min
98
96
typ
0.006
90
100
98
max
Unit
%
dB
dB
dB
Note: Measured in normal-speed playback mode in a Sanyo 1-bit D/A converter block reference circuit, with the digital attenuator set to EE (hexadecimal).
Figure 1 Command Input
Figure 2 Subcode Q Output
Figure 3 Subcode Output
No. 5342-5/34
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| Information | Total 34 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LC78631E.PDF Datasheet ] | |
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