REJ03F0170-0201 Rev.2.01 Jan 25, 2008

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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

• Rated supply voltage: V

System Configuration

Lch

INPUT

Rch

INPUT

MIC2

Lch

OUTPUT

Rch

OUTPUT

MIX

ALC

MIX

MIX

Echo VOL

Source

selector

L

R

MIC1

AUDIO SW

MIC SW

ALC

MIC VOL

MIC VOL

MIX

Digital

echo

Vocal

cut