I need two latching chips (or one that does both things).
The first needs to latch when an input signal goes high, and keep that high signal as an output. So I want to have the output from the latch to be low before the latch triggers, then once the latch triggers I want the output to be high until the latch is reset.
The second thing I need is a latch that will take two changing inputs and will output the same value until the latch triggers at which point the outputs will remain the same (same as the input when the latch was triggered) regardless of the changing input. Again it needs to hold this value until the latch is reset.
So the difference is the first will use the input as the trigger while the second will use an external trigger. You may be able to do both with the same chip but I am not sure if I would hit a timing problem in the first by using a signal as its own trigger.
Again I am looking for these functions in the form of SSI chips, and I really don't have any idea on where to began looking for them. Any help would be appreciated.
The first needs to latch when an input signal goes high, and keep that high signal as an output. So I want to have the output from the latch to be low before the latch triggers, then once the latch triggers I want the output to be high until the latch is reset.
The second thing I need is a latch that will take two changing inputs and will output the same value until the latch triggers at which point the outputs will remain the same (same as the input when the latch was triggered) regardless of the changing input. Again it needs to hold this value until the latch is reset.
So the difference is the first will use the input as the trigger while the second will use an external trigger. You may be able to do both with the same chip but I am not sure if I would hit a timing problem in the first by using a signal as its own trigger.
Again I am looking for these functions in the form of SSI chips, and I really don't have any idea on where to began looking for them. Any help would be appreciated.