CIP 3250A
ADVANCE INFORMATION
Pin 55 – RESQ Input (Fig. 3–10)
Pin 63 – BU Analog Blue/U Chroma Input (Fig. 3–13)
This input pin takes the AC-coupled analog component
signal Blue or U Chroma. The amplitude is 1.0 V maxi-
mum at 75 Ohms and a coupling capacitor of 220 nF. In-
ternally, the DC-offset of the input signal is adjusted via
the programmable internal clamping circuit. Connect to
ground if not used.
A low signal at this input pin generates a reset. The low-
to-high transition of this signal should occur when the
supply voltage is stable (power-on reset).
Pin 56 – TMODE Input (Fig. 3–2)
This pin is for test purposes only and must be connected
to ground in normal operation.
Pin 64 – GNDBU Analog Ground
Pin 57 – AVDD Analog Supply +5 V
This is the ground pin for the A/D converter of the Blue
or U Chroma signal and must be connected to ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
This is the supply voltage pin for the A/D converters and
must be connected to a positive supply voltage.
Note:ThelayoutofthePCBmusttakeintoconsideration
the need for a low-noise supply. A bypass capacitor has
to be connected between ground and AVDD.
Pin 58 – AVSS Analog Ground
This is the ground pin for the A/D converters and must
be connected to ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
Pin 65 – GY Analog Green/Luma Input (Fig. 3–13)
This input pin takes the AC-coupled analog component
signal Green or Luma. The amplitude is 1.0 V maximum
at 75 Ohms and a coupling capacitor of 220 nF. Inter-
nally, the DC-offset of the input signal is adjusted via the
programmable internal clamping circuit. Connect to
ground if not used.
Pin 59 – ADREF Connect External Capacitor (Fig. 3–11)
Thispinshouldbeconnectedtogroundovera10µFand
a 100 nF capacitor in parallel.
Pin 66 – GNDGY Analog Ground
This is the ground pin for the A/D converter of the Green
or Luma signal and must be connected to ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
Pin 60 – SUBSTRATE
This is connected to the platform which carries the “die”
and must be connected to the ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
Pin 67 – RV Analog Red/V Chroma Input (Fig. 3–13)
This input pin takes the AC-coupled analog component
signal Red or V Chroma. The amplitude is 1.0 V maxi-
mum at 75 Ohms and a coupling capacitor of 220 nF. In-
ternally, the DC-offset of the input signal is adjusted via
the programmable internal clamping circuit. Connect to
ground if not used.
Pin 61 – FB Analog Fast Blank Input (Fig. 3–12)
This input takes the DC-coupled analog Fast Blank sig-
nal. The amplitude is 1.0 V maximum at 75 Ohms. Con-
nect to ground if not used.
Pin 62 – GNDFB Analog Ground
Pin 68 – GNDRV Analog Ground
This is the ground pin for the AD converter of the Fast
Blank signal and has to be connected to ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
This is the ground pin for the A/D converter of the Red
or V Chroma signal and must be connected to ground.
Note: All ground pins of the chip (i.e. 18, 52, 58, 60, 62,
64, 66, and 68) must be connected together low resis-
tive. The layout of the PCB must take into consideration
the need for a low-noise ground.
Micronas
31
MICRONAS [ MICRONAS ]
