Highway 09 Ic Datasheet Exclusive Jun 2026

The output current is set by the sense resistor (R_sense) using the internal voltage reference:

Ideal for LCD calculators, digital clocks, and thermometers due to its integrated display drivers.

The program memory can be written exactly once. After the device leaves the factory with its firmware, it cannot be reprogrammed or updated. This makes the HIGHWAY09A a for reverse engineering or repair purposes. highway 09 ic datasheet

However, what caught Alex's attention was the unusual pin configuration and the proprietary encryption protocol used by the IC. The datasheet seemed to hint at a much larger and more complex system, but the details were scarce.

To help refine this datasheet or adapt it to a specific hardware design,I can provide the for your desired output voltage, calculate the ideal inductor saturation current based on your specific load, or outline a detailed register map if your variation of the HW09 uses an SPI/I2C programming interface. Share public link The output current is set by the sense

The Highway 09 is a monolithic control IC designed for high-performance switching applications. It integrates a high-voltage power MOSFET alongside complete control circuitry, making it a staple in compact offline power supplies and LED drivers.

CMOS/TTL compatible digital input pin. A logic low or high on this pin drives the state of the physical bus outputs when the transmitter is enabled. This makes the HIGHWAY09A a for reverse engineering

: Typically operates within standard logic levels, though specific "Enable" pin voltages are critical for preventing accidental power-on. Why the Datasheet Matters Designing or repairing a circuit without the Highway09 datasheet

: Built-in rugged avalanche-rated MOSFET. Low Standby Power : Consumes minimal current in idle state. Frequency Jittering : Built-in EMI reduction mechanism.