hi everyone,
i'm looking for ideas for interface ICs because after lengthy search i'm mostly hitting the same part numbers.
i've been working on couple of projects requiring digital I/O interface to 24V. now i'm doing another one and i'm trying to go away from conventional or customized level shifting using resistors and clamping diodes or zeners or optocouplers etc. while it has all flexibility one would need, is just too bulky and it takes too many parts. i'm looking for something more integrated (fewer parts), and able to handle multiple channels.
it could be very simple, something like ULN2002 which i would use too if the Vce_on was not that high. there must be some hopefully single chip solution not costing an arm and leg that integrates all the jazz (voltage dividers, clamping diodes and level shifter) with 8-16 channels. can you offer some part numbers worth checking out? i'm just checked 74HC07 which has clamping diodes built in on each input (so only needs resistor network for non-isolated interface).
for outputs i've been using UDN29xx and VNQ810 but would be interested in something that has true PNP open collector - something that does a bit of both (like UDN but with low Vce, not Darlington emitter follower).
what do you think
i'm looking for ideas for interface ICs because after lengthy search i'm mostly hitting the same part numbers.
i've been working on couple of projects requiring digital I/O interface to 24V. now i'm doing another one and i'm trying to go away from conventional or customized level shifting using resistors and clamping diodes or zeners or optocouplers etc. while it has all flexibility one would need, is just too bulky and it takes too many parts. i'm looking for something more integrated (fewer parts), and able to handle multiple channels.
it could be very simple, something like ULN2002 which i would use too if the Vce_on was not that high. there must be some hopefully single chip solution not costing an arm and leg that integrates all the jazz (voltage dividers, clamping diodes and level shifter) with 8-16 channels. can you offer some part numbers worth checking out? i'm just checked 74HC07 which has clamping diodes built in on each input (so only needs resistor network for non-isolated interface).
for outputs i've been using UDN29xx and VNQ810 but would be interested in something that has true PNP open collector - something that does a bit of both (like UDN but with low Vce, not Darlington emitter follower).
what do you think