Datasheet > TDA4433

TDA4433

更新时间： 2024-01-23 02:05:48

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		电视
页数	文件大小	规格书
5页	63K
描述
TV SIGNAL IDENTIFICATION CIRCUIT AND AFC INTERFACE

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技术参数
数据手册

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TDA4433 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	DIP	包装说明：	PLASTIC, DIP-14
针数：	14	Reach Compliance Code：	not_compliant
HTS代码：	8542.39.00.01	风险等级：	5.86
商用集成电路类型：	CONSUMER CIRCUIT	JESD-30 代码：	R-PDIP-T14
JESD-609代码：	e0	端子数量：	14
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP14,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	12 V	认证状态：	Not Qualified
座面最大高度：	5.1 mm	子类别：	Other Consumer ICs
最大压摆率：	30 mA	最大供电电压 (Vsup)：	14.5 V
最小供电电压 (Vsup)：	10.8 V	表面贴装：	NO
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7.62 mm
Base Number Matches：	1

TDA4433 数据手册

TDA4433

TEST CIRCUIT

out B

Digital AFC

out TDA4433

11kΩ

out A

0.1µF

+V_S= 12V

0 or 3V (DC)

S1a

S1b

Hor. Flyback in

0 or 3V (DC)

TDA4433

(no ident.)

Identif. out

5.6kΩ

(ident.)

11kΩ

Pos. Videoin

S1c

S1e

47nF

S1d

150pF

S1 A : Statictests

B : Functional tests

3.3kΩ

6.2kΩ

82kΩ

10kΩ

A : DC or pulses width

B : Functional tests

56kΩ

47kΩ

P1 Digital AFC perfect tuning

P2 Sensitivity control

22kΩ

100kΩ

5kΩ

22nF

APPLICATION INFORMATION

(V₂)

(V₆)

(refer to the block diagram)

High Level

Low Level

High Level

f_o– δf

f_o

f_o+ δf

TV Signal Identification Circuit

The circuit recognizes only TV signals by checking

logically during one line the coincidence between

the horizontalflyback pulse and the pulse detected

by a sync. separator.

The TDA4433 has two separate outputswhich can

have only two states, high (H) or low (L). The

outputs at pin 2 and at pin 6 remain at a low level

with no video signal input or with a video signal not

identified as a true TV signal. Both pin 2 and pin 6

are open collector outputs and must be pulled-up

to the positive supply voltage by external resistors.

The signal identification is carried out by charging

the capacitor connectedto pin 5 ; when the capaci-

tor voltage overcomes a fixed threshold voltage, a

Schmitt trigger switches andenables the AFC con-

trol. If a TV signal is recognized, the capacitor is

slightly charged every line and its voltage reaches

the thresholdafter a numberof line which is defined

by the value of the capacitor itself. The sensitivity

of the identification circuit, hence the number of

lines required to charge the capacitor, can be ad-

justed by means of the resistor connectedbetween

pin 11 and ground.

Voltage Regulator

The circuit can deliver 1 mAand it can be used as

D/A converter reference to supply fine tuning volt-

age.

EPM SYSTEM CONFIGURATIONS

With microprocessor

When the identification has been made, a signal

(level L) is available at pin 10.

TDA4433

µP

Threshold Circuit

The circuit detects 3 ranges of AFC voltage and in

combination with the TV signal identification circuit

drives the electronic switches.

With a correct TV signal, the output levels corre-

sponding to the 3 ranges are :

µP interface

M206

4/5

1 2 345

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