參數(shù)資料
型號: TDA8505
廠商: NXP SEMICONDUCTORS
元件分類: 顏色信號轉(zhuǎn)換
英文描述: SECAM encoder
中文描述: COLOR SIGNAL ENCODER, PDIP32
封裝: PLASTIC, SOT-232-1, SDIP-32
文件頁數(shù): 18/32頁
文件大小: 466K
代理商: TDA8505
July 1994
18
Philips Semiconductors
Preliminary specification
SECAM encoder
TDA8505
Notes
1.
The threshold level of pin 2 is 700
±
20 mV. The specification of the HIGH and LOW levels is in accordance with the
scart fast blanking.
The black level of input signal must be 2 V; amplitude 1 V (peak-to-peak value) nominal (Y = 700 mV,
SYNC = 300 mV).
The tolerances of f
OR
and f
OB
are with the printed-circuit board
5 kHz. This value can be influenced by the print
layout.
The oscillator operates in series-resonance. The resonance resistance of the crystal must be
<
60
and parallel
capacitance of the crystal
<
10 pF.
2.
3.
4.
INTERNAL CIRCUITRY
V
ext
(pin 19)
I
ext
external supply current
1.5
mA
SAND output (pin 20; V
ext
= 13.2 V);
see Fig.8
I
sink(max)
I
source(max)
V
TL
maximum sink current
maximum source current
top voltage level
100
100
V
ext
0.
1
10
μ
A
μ
A
V
V
ext
<
10 V
V
ext
>
10 V
V
PIN
NAME
CIRCUIT
DESCRIPTION
1
(R
Y)
(R
Y) input; connected via 47 nF
capacitor; 1.05 V (peak-to-peak
value) for EBU bar of 75%;
see also pins 3, 5, 7, 9 and 11
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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