Panasonic MN67603NS Datasheet
For Video Equipment
MN67603NS
NTSC Color Camera Synchronizing Signal Generator LSI
Overview
The MN67603NS is a CMOS LSI that generates NTSC
color camera synchronizing signals as defined by the EIA
RS-170A standard.
It features a built-in 4f
(14.31818 MHz) crystal oscil-
SC
lator circuit and divides that frequency to generate the
horizontal synchronizing signal f
cal synchronizing signal f
(15.7 kHz), the verti-
H
(60 Hz), and the composite
V
synchronizing signal.
It also divides the 4f
clock signal frequency by four
SC
to generate the color subcarrier frequency signals SC1
and SC2.
It includes a vertical reset (VR) input pin for resetting
the leading edge of the V-SERATION (3H) signal with
the falling edge of the input signal.
It also includes separate clock input pins for the color
subcarrier frequency signal circuits and the synchronizing signal circuits to permit synchronization with such
external synchronization LSIs as the MN6761S.
Features
Power-saving CMOS synchronization signal
generator (conformed to EIA RS-170A standard)
Built-in 14.31818 MHz clock generator
10 signal outputs including horizontal and vertical
synchronization signals and color subcarrier
frequency signals
Pin Assignment
V
EX4fSCI
OSCI
4f
SC
OSCO
4f
SC
EXT/INT
TEST2
EX910f
DD1
V
SC1
SC2
VR
SS1
I
H
1
2
3
4
5
6
7
8
9
10
11
SOP022-P-0375
(TOP VIEW)
V
22
21
20
19
18
17
16
15
14
13
12
DD2
V
SS2
SYNC
VD
WHD
BLK
HD
CP2
WBLK
BF
TEST1
Applications
Color video cameras
MN67603NS For Video Equipment
Block Diagram
4f
4f
SC
OSCO
SC
EX4f
OSCI
SC
V
DD1
V
SS1
V
DD2
V
SS2
VR
9
4
5
3
I
4f
SC
OSC
SC-CLK
SELECT
GATE
(Dead zone)
EXT/INT
8
HV-CLK
SELECT
11
EX910f
I
H
V reset
1/4
SC reset
1/4
1/525
1/455
1/2
f
1
V
V-Decoder
f
H
H-Decoder
2f
H
910f
H
2
15
CP2
12
10
TEST1
TEST2
22
21
6
SC17SC2
Composite Decoder
14
13
19
BF
VD
WBLK
17
BLK
20
SYNC
18
WHD
16
HD
Pin Descriptions
Pin No. Symbol Pin Name Function Description
1V
2V
22 V
21 V
44f
54f
DD1
SS1
DD2
SS2
OSCI Crystal oscillator
SC
OSCO Crystal oscillator
SC
Power supply "H" level power supply (Connect this pin to +5.0 ±0.5 V.)
Power supply for color subcarrier frequency signal circuits
Power supply "L" level power supply (Connect this pin to 0 V.)
Power supply for color subcarrier frequency signal circuits
Power supply "H" level power supply (Connect this pin to +5.0 ±0.5 V.)
Power supply for horizontal and vertical synchronizing
signals
Power supply "L" level power supply (Connect this pin to 0 V.)
Power supply for horizontal and vertical synchronizing
signals
Connect these pins to a 14.31818-MHz crystal oscillator
input
through capacitors appropriate for V
SS1
the EXT/INT pin (which includes a built-in feedback
output
resistor) produces oscillation; "H" level input stops it.
. "L" level input to
For Video Equipment MN67603NS
Pin Descriptions (continued)
Pin No. Symbol Pin Name Function Description
3 EX4f
11 EX910f
8 EXT/INT External/internal
9 VR Vertical reset input When this pin detects falling edge input, synchronizing
12 TEST1 Test input Test input Keep this pin at "H" level.
10 TEST2 Test input Test input Keep this pin at "H" level.
6 SC1 f
7 SC2 f
20 SYNC Composite synchronizing Composite synchronizing signal
19 VD Vertical drive output Vertical drive output pin (9H)
18 WHD Wide HD output Wide HD signal
17 BLK Composite blanking Composite blanking signal
16 HD Horizontal drive Horizontal drive output signal
15 CP2 Clamp pulse output Clamp pulses for luminance and color difference signals
14 WBLK Composite wide blanking Composite wide blanking signal
13 BF Burst flag output Gate signal for color subcarrier frequencies
I External clock input Color subcarrier frequency (4fSC = 14.31818 MHz) input
SC
"H" level input to the EXT/INT pin enables external clock
input. If this pin is not used, keep it at "L" level.
I External clock input External 910fH (14.31818 MHz) input for horizontal and
SC
vertical synchronizing signals
"H" level input to the EXT/INT pin enables external clock
input. If this pin is not used, keep it at "L" level.
This pin switches the chip between external and internal
synchronization switch
input
synchronization modes.
"H" level input produces external synchronization;
"L" level, internal synchronization.
signals are reset to the leading edge of the V-SERATION
signal.
The pin includes a built-in pull-up resistor.
The pin includes a built-in pull-up resistor.
The pin includes a built-in pull-up resistor.
(R-Y) output Color subcarrier frequency signal (3.58 MHz) formed by
SC
dividing the crystal oscillator signal (4fSC) by four.
(B-Y) output Color subcarrier frequency signal (3.58 MHz) formed by
SC
dividing the crystal oscillator signal (4f
) by four.
SC
This signal lags SC1 by 90°.
signal output
Preblanking signal with pulse width of 9.71 µs
signal output This signal provides a horizontal blanking interval of
10.83 µs and a vertical blanking interval of 21H.
output
Horizontal deflection start pulses
output This signal provides a horizontal blanking interval of
26.89 µs and a vertical blanking interval of 134.5H.
The pulse width is 2.51 µs with the vertical interval (9H)
dropped out.
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