BT817AKTF 查看數據表（PDF） - Unspecified
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BT817AKTF Datasheet PDF : 110 Pages
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FUNCTIONAL DESCRIPTION
Pin Descriptions
Bt819A/7A/5A
Pin Descriptions
Pins with alternate definitions on the Bt817A or Bt815A are indicated by shading (e.g., see pin number 67).
Table 2. Pin Descriptions Grouped By Pin Function (1 of 6)
Pin # I/O Pin Name
Description
The Input Stage Pins
55
I
MUX0
57
I
MUX1
45
I
MUX2
Analog composite video inputs to the on-chip input multiplexer. Used to select
between three composite sources or two composite and one S-video source.
Unused pins should be connected to GND.
53
O MUXOUT
The analog video output of the 3 to 1 multiplexer. Connected to the YIN pin.
52
I
YIN
The analog composite or luma input to theY-ADC.
67
I
CIN
The analog chroma input to the C-ADC.
NC
May be left unconnected.
59
I
SYNCDET
The sync stripper input used to generate timing information for AGC circuit. Must be
connected through a 0.1 µF capacitor to the same source as the Y-ADC. A 1 MΩ
bleeder resistor should be connected to ground.
41
A AGCCAP
The AGC time constant control capacitor node. Must be connected to a 0.1 µF
capacitor to ground.
43
O REFOUT
Output of the AGC which drives the YREF+ and CREF+ pins.
49
I
YREF+
The top of the reference ladder of the Y-ADC. This should be connected to
REFOUT.
62
I
YREF–
The bottom of the reference ladder of the Y-ADC. This should be connected to ana-
log ground (AGND).
64
I
CREF+
The top of the reference ladder of the C-ADC. This should be connected to
REFOUT.
AGND/CREF+ May be connected to either AGND or REFOUT.
73
I
CREF–
The bottom of the reference ladder of the C-ADC. This should be connected to ana-
log ground (AGND).
G AGND
Ground for analog circuitry on Bt815A.
74
I
CLEVEL
An input to provide the DC level reference for the C-ADC. This voltage should be
one half of CREF+.
AGND/CLEVEL May be connected to either AGND or 1/2 the voltage on CREF+ (the same connec-
tion as on the Bt819A and Bt817A.)
6
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