Agilent Technologies L4445A manual 34945EXT switch drive, 34945EXT position indicator sense inputs

Product Specifications

Specifications and Characteristics

34945EXT switch drive

64 channels, low side drive mode	Driver off voltage (max)	30 V
	Driver off leakage current	500 uA
	Driver on current (max)	600 mA
	Driver on voltage (max)	0.5 V @ 600 mA
64 channels, TTL drive mode	Hi output voltage	3 V @ Iout = 2 mA
	Lo output voltage	0.4 V @ Iin = 20 mA
	Lo input current	20 mA

34945EXT position indicator sense inputs

Channels

Lo input voltage (max)

Hi input voltage (min)

Input resistance

Maximum input voltage

34945EXT switch drive power supply (34945EXT powered by 34945A)

64

0.8V

2.5V

>100 kΩ @ Vin ≤ 5 V >20 kΩ @ Vin > 5 V 30 V

	Voltage	24 V nominal
		(external power supply
		required for switches
		needing different voltages)
	Current	100 mA continuous +
		200 mA (15 ms pulse,
		25% duty cycle)
34945EXT external power connection
	Voltage range	4.75 V to 30 V
	Current limit	2 A
LED indicator (Current mode divers)
	Channels	64
	Supply voltage	5 V nominal
	LED drive current	5 mA nominal
		(prog 1-20 mA)
	Driver compliance voltage	0.8 V
Maximum 8 34945Ext’s per L4445A

5