Input Signals Electrical Specifications

External Inputs Block Diagram

External Inputs Details

• Opto-coupled with internal current limit.

  • Single input trigger threshold level (TTL standard: < 0.8 V = Logical LOW, > 2.4 V = Logical HIGH. See lineDetectionLevel feature).

• Used as trigger acquisition event, counter or timestamp event, or integration control.

• User programmable debounce time from 0 to 255 µs in 1 µs steps.

• Source signal requirements:

  • Single-ended driver meeting TTL, 12 V, or 24 V standards (see table below).

  • If using a differential signal driver, only one input can be used due to the shared input common (see details below).

External Inputs DC Characteristics

Operating Specification	Minimum	Maximum
Input Voltage	+3 V	+36 V
Input Current	7 mA	11.8 mA
Input logic Low	n/a	0.8 V
Input logic High	2.5 V

Absolute Maximum Range before Possible Device Failure

Absolute Ratings	Minimum	Maximum
Input Voltage	–36 V	+36 V

External Inputs AC Timing Characteristics

Conditions	Description	Min	Unit
Input Pulse 0V – 3V	Input Pulse width High	132	µs
	Input Pulse width Low	1.22	µs
	Max Frequency	392	kHz
Input Pulse 0V – 5V	Input Pulse width High	202	µs
	Input Pulse width Low	1.28	µs
	Max Frequency	392	kHz
Input Pulse 0V -12V	Input Pulse width High	345	µs
	Input Pulse width Low	1.28	µs
	Max Frequency	392	kHz
Input Pulse 0V – 24V	Input Pulse width High	132	µs
	Input Pulse width Low	1.22	µs
	Max Frequency	392	kHz

External Inputs Drivers

Using TTL/LVTTL Drivers

External Input maximum current is limited by the Genie Nano 10G circuits to a maximum of 12 mA.

Using Common Collector NPN Drivers

External Input maximum current is limited by the Genie Nano 10G circuits to a maximum of 12 mA.

Using Common Emitter NPN Driver

External Input maximum current is limited by the Genie Nano 10G circuits to a maximum of 12 mA.

CAUTION
Only one External Signal can be used (input 1 or input 2).

Using a Balanced Driver

External Input maximum current is limited by the Genie Nano 10G circuits to a maximum of 12 mA.

CAUTION
Only one External Signal can be used (input 1 or input 2).