Panasonic AN7299S Datasheet

ICs for TV

AN7299S

Antenna diversity IC for car TV

■ Overview

The AN7299S is an antenna diversity IC for car TV.
A noise detection circuit and an antenna changeover
circuit are integrated on one chip.

■ Features

• Built-in vertical and horizontal synchronizing circuit

• Built-in antenna fixing function

• It outputs a composite synchronous signal

■ Applications

• Car TVs

0.4±0.25 0.451.27

10
11
12

Unit : mm

1
2
3
4
5
6
7
8
9

24
23
22
21
20
19
18
17
16
15
14
13

15.3±0.3

■ Block Diagram

24

23

1st
noise
amp.

ANT choice

Sync

separater

Video
clamp

22

Sync

control

21

2nd
noise
amp.

20

19

Noise

comparator

ANT switch control

18

V-sync

separater

ANT

select

switch

17

0.3

0.1±0.1

7.2±0.3

9.4±0.3

SOP024-P-0375A

16

15

ANT switch driver

ANT select decoderANT select control

Phase

detector

Charge

pump

14

0.15

2.0±0.2

0.925

13

1 / 5

divider

VCO

Horizontal OSC

1

2

3

4

5

Vertical OSC

6

7

8

9

10

11

12

1

AN7299S ICs for T V

■ Pin Descriptions

Pin No. Description

1 Antenna selection level-hold capacitor
2 Sync separation video signal input
3 Horizontal synchronizing signal AFC output

4 Horizontal synchronizing signal oscillation

time constant setting

5 Horizontal synchronizing signal output
6 Composite synchronizing signal output
7 Vertical synchronizing signal output
8 GND
9 Vertical synchronizing signal separation

time constant setting

10 Vertical synchronizing signal oscillation

time constant setting

11 Charge pump integral time-constant setting

Pin No. Description

12 VCO oscillation time-constant setting
13 Antenna selection output 4
14 Antenna selection output 3
15 Antenna selection output 2
16 Antenna selection output 1
17 Power supply
18 Noise comparator level setting

/Antenna fixing

19 Noise level hold capacitor
20 Noise comparator input
21 2nd noise amplifier output
22 Video clamp input
23 1st noise amplifier output
24 Video signal input

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Supply current I

2

Power dissipation
Operating ambient temperature
Storage temperature

Note)*1 : All items are at Ta = 25°C, except for the operating ambient temperature and storage temperature.

2: Ta = 85°C

*

*

1

*

1

*

CC

CC

P

D

T

opr

T

stg

5.5 V
25 mA

180 mW

−35 to +85 °C

−55 to +125 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

4.5 to 5.5 V

2