NJM2257D NJR, NJM2257D Datasheet - Page 3

• Manufacturer Part Number: NJM2257D
• Description: IC SYNCH SEPARATOR W/AFC 16-DIP
• Manufacturer: NJR
• Type: Synchronous Separatorr

Specifications of NJM2257D

• Applications: AV,TV, VTR
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

■ APPLICATION CIRCUIT
■ APPLICATION NOTES
Ver.2004-02-17
It shows the characteristics by changing of the following resistor.
● The resistance between 9 Pin and GND
● The resistor between 9 Pin and V
● The resistor between 9 Pin and GND is fundamentally 14.2kΩ, because the purpose of this resistor is pulse width adjusts 4µs.
● The resistor between 10 Pin and GND
● The resistor between 13 Pin and GND
● The resistor joind 2 Pin
High resistance
Low resistance
At the resistor is 100Ω. AFC HD Delay adjustment is off, and AFC HD output width is 4µs (typ.)
High resistance
Low resistance
High resistance
Low resistance
Please adjust the wide of following W is from 33 µs to 37 µs (W = - (C·R)In0.5)
AFC HD pulse is narrow
AFC HD Delay time loses
Vsync pulse is narrow
AFC HD pulse is wide
AFC HD Delay time gains
Vsync pulse is wide
+
Fig 1 I / O PULSE
NJM2257
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