UPC1830GT NEC, UPC1830GT Datasheet - Page 12

• Manufacturer Part Number: UPC1830GT
• Description: FILTER-CONTAINING VIDEO CHROMA/ SYNCHRONIZING SIGNAL PROCESSING LSI COMPATIBLE WITH NTSC/PAL SYSTEM
• Manufacturer: NEC

12
Pin No.
40
41
42
H sync. detect
filter
f
NTSC/PAL
switch
SC
Pin name
switch
10 k
1 k
41
42
V
CC
V
Equivalent circuit
CC
40
5 k
V
5 k
V
CC
CC
10 k
5 k
20 A
20 A
Pin for connecting filter of H sync.
detector.
Pin for controlling f
(pins 28, 29) switch. When the pin
voltage is 2.8 V or more, the mode
changes to the 3.58 MHz mode;
when 2.2 V or less, to the 4.43
MHz mode.
Pin for controlling switch of NTSC
and PAL modes of decoder and
matrix. One of the following three
combinations of decoder and
matrix modes can be selected
depending on the value of the pin
42 voltage V42:
1. When V42 = 0 V
2. When V42 = 2.5 V
3. When V42 = 5 V
decoder = PAL
matrix
decoder = NTSC
matrix
decoder = NTSC
matrix
Function descriptions
= PAL
= NTSC
= PAL
SC
VCO input
PC1830