B
Bill Bowden
- Jan 1, 1970
- 0
Looking at the spec sheet for the TLC555 CMOS timer I see the output
source current is rated at around 10mA. Hooking it up on the bench with
a 510 ohm load yields about a 4.5 volt swing using a 6 volt supply.The
positive output is about 1.5 volts less than the supply voltage so it
apperas to be excessively loaded at 9 milliamps. The output dosn't move
completely between the rails and loses about 1.5 volts with a 10mA
load.
Is this normal, and is it safe to operate a CMOS chip with such a large
voltage drop across the internal parts?
The power dissipation in this case is only 1.5 times 10mA, or about 15
milliwatts, so I'm guessing the operation is ok?
-Bill
source current is rated at around 10mA. Hooking it up on the bench with
a 510 ohm load yields about a 4.5 volt swing using a 6 volt supply.The
positive output is about 1.5 volts less than the supply voltage so it
apperas to be excessively loaded at 9 milliamps. The output dosn't move
completely between the rails and loses about 1.5 volts with a 10mA
load.
Is this normal, and is it safe to operate a CMOS chip with such a large
voltage drop across the internal parts?
The power dissipation in this case is only 1.5 times 10mA, or about 15
milliwatts, so I'm guessing the operation is ok?
-Bill