The Texas Instruments SN75463P is a dual peripheral driver in an 8-pin DIP, sinking up to 300 mA per output from a 4.75 V to 5.25 V supply. Each of the two elements drives two bits, giving four independent open-collector outputs.
300 mA sink — what it means for relay and solenoid selection
The 300 mA current-sink rating per output sets the load ceiling: a 5 V relay coil drawing 150 mA leaves 50% headroom, but a 24 V relay with a 400 mA coil is out of range. For solenoid valves in the 200 mA to 250 mA range, the SN75463P works with a flyback diode across the load. The open-collector output pulls low when the input is high, so the load connects between the positive supply and the output pin. No internal clamp diode is specified — add an external one (1N400x or similar) for inductive kickback protection.
Package and footprint — through-hole for prototyping and legacy boards
The 8-DIP (0.300", 7.62 mm) through-hole package with the 8-PDIP supplier package fits standard prototyping boards and sockets. No thermal pad or exposed paddle — the plastic DIP relies on lead-frame conduction.
For BOM planning, this means the part remains a valid line-item for new production without imminent obsolescence risk.