1883IS Просмотр технического описания (PDF) - Intersil
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1883IS Datasheet PDF : 9 Pages
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EL1883
Pin Descriptions
PIN NUMBER
PIN NAME
PIN FUNCTION
1
Composite Sync Out Composite sync pulse output; sync pulses start on a falling edge and end on a rising edge
2
Composite Video In AC coupled composite video input; sync tip must be at the lowest potential (positive picture phase)
3
Vertical Sync Out Vertical sync pulse output; the falling edge of vert sync is the start of the vertical period
4
GND
Supply ground
5
Burst/Back Porch Burst/back porch output; low during burst portion of composite video
Output
6
RSET (Note)
An external resistor to ground sets all internal timing; a 681k 1% resistor will provide correct timing for
NTSC signals
7
Horizontal Output Horizontal output; falling edge active
8
VDD 5V
Positive supply (5V)
NOTE: RSET must be a 1% resistor
Typical Performance Curves
VDD = 3V, VDD = 5V, TA = 25°C
900
800
700
600
500
400
300
200
100
0
10
20
30
40
50
60
70
FREQUENCY (kHz)
FIGURE 1. RSET vs HORIZONTAL FREQUENCY
TA = 25°C
300
250
200
150
VDD=5V
100
VDD=3V
50
200
0
100 200 300 400 500 600 700 800
RSET (kΩ)
FIGURE 2. BURST/BACK PORCH DELAY vs RSET
TA = 25°C
7
6
5
VDD=3V
4
VDD=5V
3
2
1
0
100 200 300 400 500 600 700 800
RSET (kΩ)
FIGURE 3. HORIZONTAL SYNC WIDTH vs RSET
TA = 25°C
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
100
300
VDD=5V
VDD=3V
500
700
900
RSET (kΩ)
FIGURE 4. BURST/BACK PORCH WIDTH vs RSET
3
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