Hello,
Regarding to the ON-state input voltage on ULN2003A, my customer is asking some question.
When input is opened, output collector is on. (Ic=5mA) and they will decide register R on input side.
(Question)
(1) About ON-state input voltage (datasheet page5),
Is it meaning that it is VIH(TTL/CMOS) for output collector is on?
Or when Ic=200mA, they should input less than 3V for output collector is on?
(2) They will use Ic=5mA as collector current.
When Ic=5mA, how will ON-state input voltage become?
They think that it will be smaller compare with case of Ic=200mA.
If so, how many voltages will it be become? Their understanding is correct?
And when they use high-current transistor array for low current operation,
is transistor array switched with no problem?
(3) About Figer6. (datasheet page 9),
In case of ULN2003A, maximum input voltage is 3V
From Figer6., when input is 3V, input current is about 500mA(typ) and about 900mA(max).
(input current)
・Typical(500mA) -> It is needed for output collector is on?.
・Maximum(900mA) -> Current limit for input? Or Maximum of needed current for input?
Regards,
Tao2199