TB1328FG Toshiba, TB1328FG Datasheet - Page 28

• Manufacturer Part Number: TB1328FG
• Manufacturer: Toshiba

Specifications of TB1328FG

• Function: Programmable audio/video switch and frequency detection
• Features: CVBS, S-Video or YcbrCr/RGB or D-connector, auto sync processor, pre-filter, dummy HD/VD output
• Operating Voltage: 9V,5V
• Package: QFP64 (lead-free)

Recommended crystal oscillator
External CW input into crystal oscillator pin
When a connected crystal oscillator is used for the XO, the following oscillation specifications are required.
Instead of connecting a crystal oscillator, it is possible to input an external CW (Continual Wave) into pin 28 through a
capacitor as below.
The required specs on the CW are as follows.
Oscillation frequency (fundamental): 3.579545MHz (for NTSC decoding)
Frequency tolerance: +/- 50ppm
Input frequency (fundamental): 3.579545MHz +/- 50ppm
Input amplitude: 1.0Vp-p +/- 0.5Vp-p
250
200
150
100
50
0
0
Fig. Typical delay-time characteristics of pre-filter (group delay @ 1MHz)
20
CW
40
BANDWIDTH data
28
60
220pF
80
20
XTAL
fo SW = high
fo SW = low
fo SW = high, fc HALF = on
fo SW = low, fc HALF = on
100
TB1328FG
2006-11-13
120
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