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: V
CC
= 4.5 V to 5.5 V
•
Rated supply voltage: V
CC
= 5 V
System Configuration
AUDIO SW
Lch
INPUT
Source
selector
L
R
Vocal
cut
MIX
Lch
OUTPUT
Rch
INPUT
MIX
ALC
MIC1
MIC VOL
MIX
Digital
echo
MIC VOL
Echo VOL
MIX
Rch
OUTPUT
MIC SW
ALC
MIC2
REJ03F0170-0201 Rev.2.01 Jan 25, 2008
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RENESAS [ RENESAS TECHNOLOGY CORP ]
