I am working on a circuit with a Sharp Memory display that requires a VCOM 50% duty cycle square wave signal at a frequency of approx 1Hz.
It was suggested to use a TS3005 (Datasheet)which looked perfect until I see that Silicon Labs has EOL (End of Life) its timers and I cannot seem to get hold of them anymore.
It looks like the whole family of TS3001->TS3006 are being discontinued.
The TS3005 looked perfect because it had an adjustable duty cycle frequency using just a simple Resistor and its Ultra Low Supply Current: 1.35μA at 49Hz. This is a nice chip because it runs all on its own without CPU intervention.
I looked at the TI TPL5x00 chips but they all seem to need an outside DONE signal, and I wanted my CPU to be completely asleep, while the timer chip refreshes the Memory Display.
I really need something with very low power consumption as it will be running from a coin-cell battery.
Does anyone know of a suitable replacement circuit that performs the same in both duty cycle of 50%, Frequency (1Hz) and very low supply current?
I looked at the 555 timer and the power consumption is way too large.
I am working on something similar to the Chronio watch project here.