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XT Series DISK RECORDER - Technical Reference

EVS Broadcast Equipment SA - Nov 2005

Issue 3.0

i=0 to 0.5 mA -> opto OFF

i=2.5 to 30 mA -> opto ON

imax= 30 mA

• Direct connection to a TTL/CMOS signal possible (Pin opto - to

GND and pin opto + to the TTL/CMOS signal.

Typical switching point @ 1.6 Volts, for secure operation:

Vin< 0.8 Volts -> opto OFF

Vin> 2.2 Volts @ 2 mA -> opto ON

Vin max (without external resistor) = 15 Volts

4 X CMOS input/output:

• each pin can be individually configured as an output or an input.

• internal 4K7 pull up to +5V.

• low level Vi<1.5 Volt (U12=74HC245)

• high level Vi>3.5 Volt (U12=74HC245)

• optionnal TTL compatible level (U12=74HCT245)

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