M65845AFP
Digital Echo with Microphone Mixing Circuit
REJ03F0170-0201
Rev.2.01
Jan 25, 2007
Description
The M65845AFP is a CMOS IC built-in digital echo function with microphone peripheral circuits for Karaoke
equipment packed in a single chip.
It is suitable for Karaoke equipments such as video CD player, mini stereo, CD-radio cassette, TV or VCR.
Being pin compatible with the M65845FP, the M65845AFP is suitable for upgrading the series.
Features
• High performance digital echo circuit thanks to 16 Kbit memory
• Two microphone-mixing lines, vocal cut circuit, digital echo, and line-mixing amplifier are contained, enabling
single-chip package of microphone peripheral circuit of Karaoke equipment.
• ALC-equipped microphone amplifiers permit excessively high-input. ALC operating voltage can be set as desired.
• Vocal cut circuit of complete stereo construction
• Compatibility with the M65845FP
• Built-in current-control oscillation circuit
• Built-in automatic reset circuit activated with power on
• Single power supply (5 V)
Recommended Operating Condition
• Supply voltage range: VCC = 4.5 V to 5.5 V
• Rated supply voltage: VCC = 5 V
System Configuration
Lch
INPUT
Rch
INPUT
MIC1
MIC2
ALC
ALC
MIC VOL
MIC VOL
AUDIO SW
Source
selector
L
R
Vocal
cut
MIX
MIX
Digital
echo
Echo VOL
MIX
Lch
OUTPUT
MIX
Rch
OUTPUT
MIC SW
REJ03F0170-0201 Rev.2.01 Jan 25, 2008
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