ELECTRIC

MITSUBISHI

M65845AFP

PRELIMINARY

Notice

; This

is not

a final

specification.

some

parametric

limits

are

subject

to change.

MITSUBISHI SOUND PROCESSOR ICs

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/ 15 )

DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT

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.

Supply voltage range••••••••••Vcc=4.5~5.5V

Rated supply voltage•••••••••• Vcc=5V

RECOMMENDED OPERATING CONDITION

•High performance digital echo circuit thanks to 16Kbit

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 (5V)

DESCRIPTION

PIN CONFIGURATION

FEATURES

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

23

24

25

26

27

28

29

30

31

32

33

34

35

36

22

MIC1 INPUT

ALC1 CONTROL

MIC1 NF INPUT

MIC1 OUTPUT

MIC1 VOLUME INPUT

MIC2 INPUT

ALC2 CONTROL

MIC2 NF INPUT

MIC2 OUTPUT

MIC2 VOLUME INPUT

MIC OUTPUT

LOWPASS FILTER1 OUTPUT

LOWPASS FILTER1 INPUT

A/D INTEGRAL INPUT

A/D INTEGRAL OUTPUT

A/D CONTROL

REFERENCE

GND

VOCAL CUT FILTER

ALC SUPPLY VOLTAGE

CONTROL

AUDIO SW2

AUDIO SW1

CLOCK CONT

MIC SW

MICECHO OUTPUT

Lch LINE OUTPUT

Rch LINE OUTPUT

Lch LINE INPUT

Rch LINE INPUT

ECHO VOLUME INPUT

LOWPASS FILTER2 OUTPUT

LOWPASS FILTER2 INPUT

D/A INTEGRAL OUTPUT

D/A INTEGRAL INPUT

D/A CONTROL

POWER SUPPLY

36P2R

1

SYSTEM CONFIGURATION

Lch

INPUT

Rch

INPUT

MIC2

Lch

OUTPUT

Rch

OUTPUT

VOCAL

CUT

MIX

ALC

MIX

MIX

ECHO VOL

DIGITAL

ECHO

SOURCE

SELECTOR

L

R

ALC

MIX

MIC1

MIC VOL

MIC VOL

MIC VOL

MIC VOL

AUDIO SW

MIC SW