Hello,
I have a CMOS (3.3V) signal that goes high for an indeterminate amount of time. This signal is telling me if there is data present or not on my bus.
I need a circuit go high when my signal goes high but I need it to stay high for an additional…
Khio,
That formula works well for frequencies below 10 kHz. Above that will result in an error that increases with frequency mostly due to propagation delay from timing cap (1/3, 2/3 Vcc) to discharge output changing state.
This formula and text from…
Other Parts Discussed in Thread: LMC555 , NE555 , LM555 , NA555 , TLC551 , SE555 , TLC552 , TLC555 , SA555 , CD4060B , CD4024B , CD4040B , CD4020B What is the difference between the part numbers?
How is the output frequency and duty cycle set?
Why…
Wang,
I confirmed your observation on LMC555.
I tested other Texas Instrument timers.
Device
Max Control
TLC555
12.8 V
TLC551
12.6 V
NE555
12.4 V
LM555
12.1 V
LMC555
11.5 V
VCC was 12.4V ,…
Ravi,
There are general purpose logic timers here. http://www.ti.com/lsds/ti/logic/monostable-multivibrator-products.page
NE555 has newer versions, TLC555, and TLC551.
Other Parts Discussed in Thread: LMC555 , NE555 , LM555 , NA555 , TLC551 , SE555 , TLC552 , TLC555 , SA555 , CD74HC4060 , SN74LV8154 This FAQ covers mono-stable circuits using the LM555, NA555, NE555, SA555, and SE555 timers that are called LM, NA, NE…
This FAQ covers PWM circuits. Figure 1 below shows a pulse width modulator using the LM555 , NA555 , NE555 , SA555 and SE555 timers that are called LM, NA, NE, SA and SE respectively hereafter. As a group they are called bipolar timers due to their design…
