MM1376CF データシートの表示（PDF） - Mitsumi

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MM1376CF

IC for Headphone Stereos

Mitsumi 

MITSUMI

IC for Headphone Stereos

Monolithic IC MM1376

IC for Headphone Stereos MM1376

Outline

This IC was developed for use in 3V headphone stereos, and combines all the basic audio circuitry for

headphone stereos on a single chip.

Recently hearing impairment caused by the high volumes of headphone stereos has become a problem, and

there has been strong demand for functions for limiting loud volumes in the sets themselves. This IC

incorporates an ALC circuit and has functions to hold the output from the headphone to a fixed level; it also

eliminates the ordinary electronic governor circuit in order to accommodate trends toward thinner sets, as

seen in the adoption of BSL motors.

Package

1. Configuration: Pre-and power amps, ALC circuit

2. Internal tape selector: A selector switch allows the user to select between normal and metal tapes.

3. Internal OCL circuit: No need for large-capacitance output capacitor

4. Preamp off function: Preamp alone can be turned off for connection to radio etc.

5. MM1376CF amp gain takes Dolby noise reduction into account

Package

SOP-22

Pin Assignment

22 21 20 19 18 17 16 15 14 13 12

1 2 3 4 5 6 7 8 9 10 11

SOP-22

1

COM1

12

Power output

2 Preamp non-inverted input 13

VCC

3

Preamp inverted input

14

Ripple filter

4

Metal switching output

15

Preamp off

5

Preamp output

16

Tape selector

6

Power input

17

Power input

7

Rectifier pin

18

Preamp output

8

ALC control

19

Metal switching output

9

Power output

20

Preamp inverted input

10

COM2

21 Preamp non-inverted input

11

GND1

22

GND2

Absolute Maximum Ratings

Item

Operating temperature

Storage temperature

Power supply current

Power consumption

Symbol

TOPR

TSTG

VCC

Pd

Ratings

-10~+65

-40~+125

-0.3~+7.5

350

Units

°C

°C

V

mW

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