But what exactly is the Highway09A? Depending on the context—often misidentified or confused with series like the 7400 logic family or specialized CAN bus transceivers—the "Highway09A" typically refers to a . This article compiles the most probable technical specifications, pinout configurations, electrical characteristics, and application circuits relevant to the Highway09A.
For half-duplex 2-wire networks (RS-485), tie RE and DE together. Connect to MCU pin for TX/RX switching. 6. Application Circuit Example Microcontroller to Highway09A to RS-485 Bus +5V | ┌┴┐ │ │ 0.1µF └┬┘ | Highway09A MCU Tx --|-------------|D (pin4) MCU Rx --|---------|R (pin1) MCU Dir--|--┬------|RE (pin2) └------|DE (pin3) |GND (pin5)----- GND |A (pin6) ------+--- A line to bus |B (pin7) ------+--- B line to bus +5V|VCC (pin8)----+5V Termination: Add 120Ω resistor across A and B at both ends of long cable. highway09a ic datasheet
Caution: Continuous operation near maximum ratings is not recommended. These values help determine compatibility with your MCU (e.g., Arduino, STM32, PIC). But what exactly is the Highway09A
Have you successfully used the Highway09A in a project? Share your findings in the comments below or contact us for schematic review. For half-duplex 2-wire networks (RS-485), tie RE and
| Symbol | Parameter | Condition | Min | Typ | Max | Unit | |--------|----------------------|-----------------------|------|-----|------|------| | VIH | Logic Input High (D,DE) | | 2.0 | - | VCC | V | | VIL | Logic Input Low (D,DE) | | 0 | - | 0.8 | V | | VOH | Receiver Output High (R)| Iout = -4mA | 3.5 | 4.5 | - | V | | VOL | Receiver Output Low (R) | Iout = 4mA | - | 0.2 | 0.4 | V | | VOD | Differential Driver Out | RL = 54Ω (RS-485) | 1.5 | 2.5 | 3.0 | V | | IIN | Bus Input Current | Vbus = ±60V (disabled)| - | 10 | 100 | μA | | ICC | Supply Current (active)| No load, DE=1 | - | 1.5 | 3.0 | mA |