EL4581 Datasheet (Renesas)

EL4581, Sync Separator

MIN TEMP (°C) (Note 7) IDD Clamp Voltage VDD = 5V (Note 1) Pin 2, Unloaded +25 0.75 +25 1.3 Discharge Current Pin 2 = 2V +25 6 Clamp Charge Current Pin 2, VIN = 1V Ref Voltage Pin 6, VDD = 5V (Note 2) VOL Output Low Voltage IOL = 1.6mA VOH Output High Voltage IOH = -40µA IOH = -1.6mA

EL4581 Sync Separator, 50% Slice, S-H, Filter The EL4581 extracts timing information from standard negative going video sync found in NTSC, PAL and SECAM broadcast systems.

It can also be used in non standard formats and with computer graphics systems at higher scan rates, by adjusting a single external resistor.

When the input does not have correct serration pulses in the vertical interval, a default vertical output is produced.

Outputs are composite sync, vertical sync, burst/back porch outpu

EL4581 Features

* NTSC, PAL and SECAM sync separation

* Single supply, +5V

* Precision 50% slicing, internal caps

* Built-in color burst filter

* Decodes non-standard verticals

* Pin compatible with LM1881

* Low power

* Typically 1.5mA supply current