Part Number: DS3658
I am considering using this part to provide voltage and current conditioning between a TTL buffer output and an isolated digital input on a PCI card
The output buffers used are CD4049 and CD4050 and do not have the current drive capability to drive the digital inputs on the PCI card
The PCI card is Acces I/O PCIe-IDO and can accept both DC and AC logic signals up to 30V
The PCI card inputs use a series 1.8K resister with a diode to rectify AC input and the combination is parralled with an opto-coupler led
Acces I/O application engineering states that the inputs require a minimum of 70ma to operate correctly
The buffers can only provide a maximum of 3ma output current - not enough to drive the PCI card inputs directly
My plan is to use the DS3648 with VCC / Enable of +5V and output voltage of +24V to translate the 5V / Low I buffer logic to 24V / High I logic for the PCI card inputs
Is the DS3648 the best choice for this application?
Also do you have a version of this IC that will allow VCC of +24? - I would like to use one power supply for this application
Thanks for any guidance you can give;
David Robinson
KAMAN Precision Products