Dear All
I have the following questions regarding the CD4536B counter timer IC:
1) The 'CLOCK' for this IC can be made from externally connected 'R' and 'C' to appropriate pins. This part is available from one other manufacturer which gives the clock period approximately as "Tc = 2.3RC" whereas TI datasheet gives it as "Tc = 3RC". Why so much difference in the Tc value given that they are the same parts?
2) Logic diagram of this part shows Pin 3 to be a Schmitt input. However there is no mention of 'upper' and 'lower' trigger thresholds and 'hysteresis' voltages. Given this absence of information is it safe to say that they are the same as CD40106B Hex Schmitt triggger IC since both of these ICs belong to the 'B' series CMOS family?
3) From a product life cycle perspective where would be the TSSOP version of CD4536?
Questions (1) and (2) above pertain to a requirement to accurately (+/-3%) set the clock period (Tc) by installing a calculated value of 'R' +/-1% given a fixed 'C' +/-1%.
Regards
i.k