Measurement Specialties PMD-1024HLS manual Counter section, Power

PMD-1024HLS User's GuideSpecifications

Counter section

	Table 4-2. Counter specifications
Pin name (Note 4)	CTR
Counter type	Event counter
Number of channels	1
Input source	CTR screw terminal
Resolution	32 bits
Schmidt trigger hysteresis	20 mV to 100 mV
Input leakage current	±1 µA
Maximum input frequency	1 MHz
High pulse width	500 ns min
Low pulse width	500 ns min
Input low voltage	0 V min, 1.0 V max
Input high voltage	4.0 V min, 15.0 V max
Note 4: CTR is a Schmitt trigger input

Power

Table 4-3. Power specifications

Parameter	Conditions		Specification
Supply current (Note 5)	No Load		60 mA
Input power requirements			4.75 V min, 5.25 V max
(Note 6)
USB +5 V power available	Measured at “USB +5 V” screw terminals		4.4 V min, 5.25 V max
	(pins 10,14 and 30)
USB +5 V power output	Connected to:		[350 mA] – [total output source
current (Note 7)	ƒ	Self-powered hub	current]
	ƒ	Externally-powered root port hub
	Connected to		[60 mA] – [total output source
	ƒ	Bus-powered hub	current]
	ƒ	Battery-powered root port hub.
USB +5 V overcurrent	Resettable fuse		Hold current: 350 mA, typical
protection
			Trip current: 700 mA typical
			Trip/recovery time: 100 mS, max
			On resistance: 1.3 Ohms max

Note 5: This is the total (no load) current requirement for the PMD-1024HLS.

Note 6: Bus-powered hubs are allowed to provide downstream USB power as low as 4.4 V. Although your PMD-1024HLS will typically function at this 4.4 V minimum, guaranteed performance requires a minimum power supply voltage of 4.75 V. All self-powered and root port hubs will meet this 4.75 V minimum.

Note 7: See available source/sink current level in the "Digital input/output" section.

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