TEA2128 데이터 시트보기 (PDF) - STMicroelectronics
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TEA2128 Datasheet PDF : 8 Pages
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TEA2128
ELECTRICAL CHARACTERISTICS (continued)
(TAMB = 25oC; VCC = 12V; Pulse duration 50% of the amplitude)
Symbol
Parameter
Pins
Test conditions
NOISE GATE
Measure sampling time
Max. push out current
VCR switch inhibition threshold
Measure bandwidth (-3dB)
Short time constant manual
switching threshold
Long time constant
Manual switching threshold
5 On the synch. pulse bottom
Max. noise
Active under threshold
From lower to higher voltage
From higher to lower voltage
φ 2 COMPARATOR (Pin 14)
Output current
Delay between φ 2 falling edge
and the middle video sync. pulse
23 -4
During line flyback
FVCO = 500 kHz
LINE MONOSTABLE
Charge current
Discharge current
Flip-Flop threshold
19 Line output high
19 Line output low
19 Falling edge on the line output
LINE OUTPUT
Low level
Pulse duration
φ 2 adjustment range
20 I20= 20 mA
R18 = 3.32kΩ , C19 = 1.5nF
20 Controlled by V23 compared
with video signal
LINE SAW-TOOTH
Charge Current
Discharge Current
Discharge Duration
17 R18 = 3.32 kΩ
17
Controlled by logic VCO 500kHz
LINE FLYBACK INPUT
Blanking Line Threshold
φ 2 Loop Threshold and Line
Output Inhibition
Input Current
22
20
- 0.4V < V22 < 0.4V
0.4V < V22 < 3V
3V < V22
SUPER SANDCASTLE GENERATOR
Burst Level
Line Blanking
Frame Blanking
Delay between the midde of the
video sync. pulse and the rising
edge of the burst (t1)
21 RL = 2.2 kΩ to ground
21
21
21
Min.
700
4.5
6.9
6.8
27.5
0.38
2.85
9
4
2
Typ. Max. Unit
2
µs
350
µA
7.3
V
2000 kHz
5
5.5 V
7.3 7.6 V
7.2 7.5 V
± 600
µA
2.8
µs
- 67
µA
120
µA
1.3
V
1
V
29 30.5 µs
16
µs
- 180
µA
7
mA
6.5
µs
0.4 0.42 V
3 3.15 V
-10
µA
-5
µA
- 1 µA
V
4.5
5
V
2.5
3
V
2.8
µs
t1
4/8
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