AN3117 Просмотр технического описания (PDF) - Panasonic Corporation

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AN3117

RF modulator IC for VCR and VDP

Panasonic Corporation 

AN3117S, AN3117SA

s Terminal Equivalent Circuits (continued)

Pin No. Pin name

Equivalent circuit

13 Antenna switch

10.2 kΩ

13

Other ICs for Video

Description

Standard open voltag

When pin 13 is connected

to VCC, RF oscillator and

driver changeover pin are

operated and when this pin

is open circuited, RF oscilla-

tor is stopped.In this state, no

pop noise will not be made

when antenna switch is

turned on/off even if sound

system is operating.

0.7 V

14 Antenna switch

driver pin

When pin 13 is connected to

Pin 13: VCC

VCC, this pin voltage becomes

4.0 V

4.0 V. (RF oscillator ope- (Load cureent in 15 mA)

2 kΩ

ratesand load current is 15

mA)

When pin 13 is open-cir-

Pin 13: Open

14 cuited, this pin voltage is 0 V.

0V

8 kΩ

(RF oscillator stops)

Drive capability of driver pin

is approx. 30 mA.

15 RF output pin

Output pin of RF signal.

It has low impedance output.

2.7 V

660 Ω

15

16 Video input pin

16

6

The sync. peak value clamp

system is adopted for input

clamp circuit. This pin has a

high input impedance to

minimize sync. distortion.

Pay attention to the sync. sag

which is likely to occur when

an external capacitor attached

is 0.47 µF or less.

2.0 V

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