U4935B Datasheet, PDF (13/16 Pages) TEMIC Semiconductors – SECAM Decoder

Typical Voltages
Pin
Function
1 f_ref / ident
2 Bell-filter output
3 Supply voltage
4 Bell-filter ref. voltage output
5 SECAM killer output
6 Ground
7 Bell-filter reference
8 PLL reference
9 –(R–Y) output
10 –(B–Y) output
11 Black level adjust B - channel
12 PLL auto 2
13 PLL auto 1
14 Black level adjust R - channel
15 Sandcastle-pulse (SCP) input
16 CVBS input
U4935B
DC Voltage
1.7 V
8V
4.3 V
3.1 V
0V
Comment
For the - reference input,
- PAL system identification input,
- SECAM killer-signal output.
180 mA typ. at SECAM
0 mA typ. at no SECAM
System switches detection level = 2.9 V.
When SECAM
When no SECAM
3.3 V
4.3 V
2.8 V
2.8 V
4.16 V
5.0 V
5.0 V
4.28 V
The capacitor should be connected as close as
possible to the ground pin of the package.
1.0 V (peak-to-peak value) when the color-bar
signal at Pin 16 is 100/75.
1.24 V (peak-to-peak value) when the color-bar
signal at Pin 16 is 100/75
Black-level error can be compensated by an
external resistor
Capacitor between Pin 12 and Pin 13 improves
color S/N ratio. The value of the capacitor is typ.
0.1 mF.
Capacitor between Pin 12 and Pin 13 improves
color S/N ratio. The value of the capacitor is typ.
0.1 mF.
Black-level error can be compensated by an
external resistor
2.05 V
TELEFUNKEN Semiconductors
Rev. A1, 28-Jan-97
Preliminary Information
13 (16)