Delta ASD-A2 Series User Manual page 293

Chapter 8 Parameters
Logic
0
Logic
0
For digital circuit, it uses 0 and 1 represents two status, which is high voltage and low
voltage. In Positive Logic, 1 represents high voltage and 0 represents low voltage
and vice versa in Negative Logic.
For example:
Positive Logic
Negative Logic
Specification
High-speed
pulse
Low-speed
pulse
Pulse Specification
High-speed
pulse
Low-speed
pulse
8-42
Pulse
Type
Sign = high
Pulse +
Symbol
Pulse
Type
Sign = low
Pulse +
Symbol
Pulse Max. Input
Frequency
Differential
4Mpps
Signal
Differential
500Kpps
Signal
Open-
200Kpps
collector
Differential
Signal
Differential
Signal
Open-collector
High-speed pulse input
Forward
Low-speed pulse input
Forward
T1 T2
62.5ns 125ns
0.5μs 1μs
1.25μs 2.5μs
Max. Input
Frequency Specification
4Mpps
500Kpps 2.8V ~ 3.7V
200Kpps 24V (Max.)
Reverse
Sign = low
Reverse
Sign = high
Minimum time width
T3 T4
250ns 200ns 125ns
2μs 2μs
5μs 5μs 2.5μs
Voltage
Forward Current
5V < 25mA
< 25mA
< 25mA
Revision February, 2017
ASDA-A2
T5 T6
125ns
1μs 1μs
2.5μs