Keep analog ground (Pin 24) and power ground (Pin 2) separate until they meet at the power supply entry point. This prevents ground loops and hum.
Regulated output variants can provide up to 1A. Quiescent Current: Extremely low, often around 10μA. Pin Configuration (16-Pin DIP) highway 09 ic datasheet
| Pin group | Count | Function | |--------------------|-------|----------------------------------| | VDD (5 V) | 2 | Internal logic supply decoupling | | VBAT (36 V) | 1 | Main power input | | LED0–LED23 | 24 | Constant current outputs | | LIN_TX / LIN_RX | 2 | LIN transceiver pins | | TRIG_IN | 1 | External sync input | | FAULT_N | 1 | Open-drain error flag | | GND | 4 | Power and signal ground | | NC | rest | No connect | Keep analog ground (Pin 24) and power ground
This article has compiled the critical sections of the highway 09 ic datasheet , including pinouts, specifications, application circuits, and equivalents. Always cross-reference with physical measurements on your specific chip, as OEM versions may have subtle variations. Quiescent Current: Extremely low, often around 10μA