REJ03F0171-0201 Rev.2.01 Jan 25, 2008

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M65850P/FP

Digital Echo (Digital Delay)

REJ03F0171-0201

Rev.2.01

Jan 25, 2008

Description

The M65850P/FP is a CMOS IC for generating echo to be added to the voice through a Karaoke microphone.

It is optimal to provide the echo effect function for Karaoke player, such as radio cassette recorders, mini audio

components and television sets.

Increased master clock frequency assures high-performance short delay, enabling the IC to be used for Dolby prologic

surround system.

Features

• Built-in input/output filters, A/D and D/A converters, and memory realize a delay system with only a single chip.

• Built-in current control type clock oscillator circuit avoids clock affection outside, thus allowing prevention of

undesired radiation.

• Delay time = 164 ms (with master clock set at 1 MHz)

(Selection of delay time in a range between 15 ms and 200 ms)

• Small package (14-pin DIP: PRDP0014AA-A (14P4), 16-pin SOP: PRSP0016DE-A (16P2N-A))

• Built-in 20 Kbit SRAM

• Built-in auto reset circuit (The IC reset as power is turned on)

• Single power supply (5 V)

Recommended Operating Condition

• Supply voltage range: V

• Rated supply voltage: V

System Configuration

L

R

MIC1

MIC2

Vocal

cut

HPF

MIX

RAM

MIX

MIX

L

R

BASS

BASS

MIX

MIX

HPF

MIC VOL

MIC VOL

LPF

Key control

MIC AMP

MIC AMP

MIX

Echo

M65850P/FP

Echo VOL

Note: Dolby is the registered trademarks of Dolby Laboratories Licensing Corporation.