saa4961 NXP Semiconductors, saa4961 Datasheet - Page 6

• Manufacturer Part Number: saa4961
• Description: Saa4961 Integrated Multistandard Comb Filter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
REFBP (
Decoupling capacitor for the band-pass filter reference
voltage.
SSYN (
Input signal that controls the function of BYP (pin 3).
V
Supply voltages.
AGND, OGND, DGND
21
Ground connection. AGND is used as signal reference for
all analog input and output signals.
C
Input for an external chrominance signal which is
correlated to the external VBS signal.
C
Chrominance output signal. This output can be switched
between the comb filtered chrominance from the CVBS
signal and the external chrominance signal from the input
C
Table 4 C
FSCSW (
Input signal to select between f
the FSC input pin.
Table 5 Reference frequency selection
1997 Feb 03
COMB
BYPASS
HIGH
LOW
CCA
ext
O
ext
Integrated multistandard comb filter
AND
(
FSCSW
PIN
MODE
(
if the IC is forced into BYPASS-mode.
, V
PIN
PIN
26)
CCO
12)
PIN
10)
PIN
6)
O
, V
5)
13)
output signal
DDD
comb filtered chrominance signal
external chrominance signal of C
2
f
sc
AND
f
sc
V
AND
SELECTED REFERENCE
CCPLL
C
O
PLLGND (
OUTPUT SIGNAL
sc
(
PINS
or 2
7, 8, 22
PINS
f
sc
as reference at
9, 11,
AND
27)
ext
input
6
Y
VBS output signal. This output can be switched between
the comb filtered luminance signal (including
synchronization) and the external (C)VBS signal from the
input Y
delayed by 2 lines (1 line at NTSC) and by an additional
processing delay.
Table 6 Y
CVBSO (
CVBS output signal directly from the input in
BYPASS-mode or delayed by the signal processing time
of 2 lines (1 line at NTSC) and an additional processing
delay.
Table 7 CVBSO output signal
Y
Input for the CVBS signal or for an external VBS signal.
LPFION (
Input signal to disable the internal pre-filter LPFI.
Table 8 Pre-filter mode
CSY (
Sync top capacitor for the sync separator.
COMB
BYPASS
COMB
BYPASS
LOW
HIGH
Floating
O
ext
(
LPFION
/CVBS (
PIN
MODE
MODE
PIN
ext
14)
/CVBS. In COMB-mode the output signal is
PIN
PIN
19)
O
PIN
15)
18)
output signal
17)
comb filtered luminance signal
external CVBS signal of Y
delay compensated CVBS signal
external CVBS signal of Y
LPFI inactive
LPFI active
LPFI active
CVBSO OUTPUT SIGNAL
Y
SELECTED MODE
O
OUTPUT SIGNAL
Preliminary specification
SAA4961
ext
ext
/CVBS input
/CVBS input