CXA3125N 查看數據表（PDF） - Sony Semiconductor

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CXA3125N

All Band TV Tuner IC (VHF-CATV-UHF)

Sony Semiconductor 

CXA3125N

Pin

Symbol

No.

Typical pin

voltage (V)

0.8

10 IFSW

(when open)

Equivalent circuit

1

VCC

40k 30k 20k

30k

10

400

400

Description

Symmetrical/asymmetrical

selection of IF output.

Asymmetrical output is selected

for open state; symmetrical

output, for connecting to GND.

When used as an asymmetrical

output, connect to GND with a

capacitor.

3.2

14

12 UOSC1

3.0

3k

3.2

14 UOSC2

3.0

12

1

VCC

3k

External resonance circuit

connection for UHF oscillators.

13 BSW

—

During

symmetrical

output 3.0

15 IFout2

During

asymmetrical

output 4.3

During

symmetrical

output 3.0

16 IFout1

During

asymmetrical

output 2.5

VCC

1

22k

13

32k

VCC

1

15

15

VCC

1

15

16

—4—

Band switching.

UHF operation when 3 V or

more voltage is applied

externally, and VHF operation

when 0.5 V or less voltage is

applied.

IF outputs during symmetrical

output. The reverse phase

signal to Pin 16 is output

during symmetrical output.

When asymmetrical output is

selected, the signal is not

output.

IF outputs.

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