LA1867NM データシートの表示（PDF） - SANYO -> Panasonic

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LA1867NM

Car Radio Single-Chip Tuner System

SANYO -> Panasonic 

Continued from preceding page.

Pin

Function

37 FM IF IN

36 IF BYPASS

LA1867NM

Unit (resistance:Ω, capacitance:F)

Equivalent internal circuit

Note

Limited amplifier input

Select the capacitor grounding point

carefully.

23 Mute drive output

22 Mute input

ΠThe muting time constants from the

external CR circuit are determined as

follows.

Attack time TA = R1 × C2

Release time TR = R2 × C2

 Noise convergence adjustment

Divide the V23 voltage by R2 when

there is no input at the antenna input,

and input that voltage to pin 22.

Noise convergence will be maximum

when V22 = 2 V.

The variation range is 5 to 35 dB,

taking the 1 kHz 22.5 kHz dev output

as the reference.

Ž Muting off function

The muting is turned off when pin 22 is

shorted to ground.

33 FM mute ON Adj

The muting on level is adjusted by changing

the external resistance R.

Continued on next page.

No. 4619-9/32

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