Dual peripheral driver with 300 mA sink capability
The SN75462DR: The 300 mA sink rating means each output can drive relays, solenoids, small motors, or LED arrays directly without an external transistor — the current is pulled low through the driver's internal Darlington pair, not sourced high. The 0.154-inch-wide SOIC-8 outline keeps the board area small — useful when multiple driver channels share a dense layout.
Supply and temperature boundaries
Dropping below 4.75 V risks the internal bias falling out of regulation; the driver's output saturation voltage rises and the 300 mA sink current may not be guaranteed. Ambient above 70 °C or below freezing means the driver is outside its rated environment — a 125 °C industrial-grade peripheral driver would be needed for outdoor or under-hood deployment. The dual-channel architecture (2 elements, 2 bits per element) lets one package drive two independent loads. Each channel's output is an open-collector Darlington — the load connects between the external supply and the output pin, and the driver pulls the pin low to sink current. No internal flyback diode is present; an external clamping diode across an inductive load (relay coil, solenoid) is required to prevent the output voltage from exceeding the transistor breakdown rating.