參數(shù)資料
型號(hào)： 935163070112
廠(chǎng)商： NXP SEMICONDUCTORS
元件分類(lèi)： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL ENCODER, PDIP32
封裝： 0.400 INCH, SHRINK, PLASTIC, SOT-232-1, DIP-32
文件頁(yè)數(shù)： 29/34頁(yè)
文件大小： 500K
代理商： 935163070112
July 1994
4
Philips Semiconductors
Preliminary specication
SECAM encoder
TDA8505
PINNING
D'R and D'B are the colour difference signals at the output of the multiplexer circuit; D'R =
1.9(RY) and
D'B = +1.5(B
Y), for an EBU bar of 75% the amplitudes are equal.
SYMBOL
PIN
DESCRIPTION
(RY)
1
colour difference input signal, for EBU bar of 75% 1.05 V (peak-to-peak value)
MCONTR
2
multiplexer control; input HIGH = RGB, input LOW =
(RY), (BY) and Y
(BY)
3
colour difference input signal, for EBU bar of 75% 1.33 V (peak-to-peak value)
FH/2
4
line pulse input divided-by-2 for synchronizing two or more encoders; when not used this
pin is connected to ground
Y
5
luminance input signal 1 V nominal without sync
TEST
6
test pin; must be connected to VCC (pin 8), or left open-circuit
R
7
RED input signal for EBU bar of 75% 0.7 V (peak-to-peak value)
VDDA
8
analog supply voltage for encoder part; 5 V nominal
G
9
GREEN input signal for EBU bar of 75% 0.7 V (peak-to-peak value)
VSSA
10
analog ground
B
11
BLUE input signal for EBU bar of 75% 0.7 V (peak-to-peak value)
Y/Y+SYNC
12
when this control input is LOW, Y without sync is connected to pin 5, input blanking at
pin 5 is active; when input is HIGH, Y+SYNC is connected to pin 5, input blanking at pin 5
is not active
LPFDR
13
modulator control loop lter output; black level of D'R = 4.40625 MHz
FADJ
14
adjustment pin for 4.286 MHz of HF pre-emphasis lter
LPFDB
15
modulator control loop lter output; black level of D'B = 4.250 MHz
FLT
16
lter tuning loop capacitor output
Vref
17
2.5 V internal reference voltage output
CHROMA
18
chrominance output, amplitude corresponds with Y+SYNC at the output of the delay line
Vext
19
external power supply for sandcastle generation; when not used this pin is connected to
ground
SAND
20
3-level sandcastle output pulse
CVBS
21
composite SECAM output 2 V (peak-to-peak value) nominal
NOTCH
22
Y+SYNC output after an internal resistor of 2 k
; a notch lter can be connected
Y+SYNC IN
23
Y+SYNC input, connected to the output of the delay line
LPF4.4
24
loop lter output for 4.40625 MHz reference oscillator
Y+SYNC OUT
25
Y+SYNC output, 2 V (peak-to-peak value) nominal, connected to the input of the
delay line
XTAL/PLL
VIDENT
26
control pin; input HIGH = crystal tuning, input LOW = PLL tuning, both without vertical
identication, 2.5 V = PLL tuning with vertical identication
VCO4.25
27
when used for PLL tuning a capacitor is connected; when used for crystal tuning a crystal
has to be connected (in series with a capacitor)
COLKIL
28
colour killing; input HIGH = active, internal colour difference signals are blanked
CS
29
composite sync input, 0.3 V (peak-to-peak value) nominal
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