Teac EU-34T - Page 11

9
STV8224B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM
WITH AUDIO AND VIDEO SWITCHES
GENERAL DESCRIPTION
The STV8224B is a picture and sound IF processor for multistandart application with very few external
components and adjusments.
It provides the audio and video switches for one SCART plug application.
AM sound demodulation is perfomed with the STV8225 add-on.
FEATURES :
n Výdeo PLL Demodulatýon
n Sound PLL Demodulatýon
n Posýtýve and Negatýve Modulation
n AGC for BG and L Standards
n Audýo Swýtch
n DC Volume Control
n Výdeo Swýtch
PINNING
1- Pýf PLL Fýlter
2- AFC Output
3- CVBS Output
4- Swýtching Input (Standard+INT/EXT)
5- IF LC
6- IF LC
7- Audýo Hýgh Pass Fýlter
8- 2nd IF Sound Input
9- Audio and nd IF Decouplýng
10- Internal Výdeo Input
11- Výdeo Swýtch Output
12- External Výdeo Input
13- Volume Control+mute
14- Audýo Swýtch Output
15- FM Demodulated Audýo Output
16- External Audýo Input
17- V
CC
18- Grount
19- IF Input
20- IF Input
21- ACG Capacýtor (L Standard)
22- ACG Capacýtor
23- Tuner AGC Output
24- Tuner AGC startýng poýnt Adjustment
19- PA1 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
20- PA2 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
21- PA3 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
22- PA4 I/O, Open Drain, 12V, No Input Pull-up, Schmitt Trigger Input
23- PA5 I/O, Open Drain, 12V, No Input Pull-up, Schmitt Trigger Input
24- PA6 I/O, Open Drain, 12V, No Input Pull-up, Schmitt Trigger Input, High Drive
25- PA7 I/O, Open Drain, 12V, No Input Pull-up, Schmitt Trigger Input, High Drive
26- PB0 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
27- PB1 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
28- PB2 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
29- PB3 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
30- PB4 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
31- PB5 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
32- PB6 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
33- PC0 I/O, Open Drain, 5V , Software Input Pull-up, Schmitt Trigger Input
34- PC1 I/O, Open Drain, 5V , Software Input Pull-up, Schmitt Trigger Input
35- PC2 I/O, Open Drain, 5V , Software Input Pull-up, Schmitt Trigger Input
36- PC3 I/O, Open Drain, 5V , Software Input Pull-up, Schmitt Trigger Input
37- PC4 I/O, Open Drain, 12V , No Input Pull-up, Schmitt Trigger Input
38- PC5 I/O, Open Drain, 12V , No Input Pull-up, Schmitt Trigger Input
39- PC6 I/O, Open Drain, 12V , No Input Pull-up, Schmitt Trigger Input
40- PC7 I/O, Open Drain, 12V , No Input Pull-up, Schmitt Trigger Input
41- PC8 I/O, Open Drain, 12V , No Input Pull-up, Schmitt Trigger Input
42- V
DD
, V
SS
Power Supply Pins