| Pin Number | Pin Name | Description | | --- | --- | --- | | 1 | VCC | Power supply voltage (5V) | | 2 | GND | Ground | | 3 | DIN | Differential input | | 4 | DOUT | Differential output | | 5 | RIN | Receiver input | | 6 | ROUT | Receiver output | | 7 | RE | Receiver enable | | 8 | DE | Driver enable |
The receiver section is enabled by the RE pin. When RE is low, the receiver section converts the balanced differential signal on RIN into a single-ended output signal on ROUT. The receiver section has a high output impedance when RE is high, allowing the output to be tri-stated. sn51dp datasheet
Microcontroller Pin → Resistor (270 Ω) → SN51DP Pin 1 (Anode) SN51DP Pin 2 (Cathode) → GND | Pin Number | Pin Name | Description
Constantly "feels" the current flow, ensuring the LEDs don't burn out from over-excitement. Pin 8 (COMP): Microcontroller Pin → Resistor (270 Ω) → SN51DP