Highway09a Ic Datasheet

#include <Wire.h>
#define AW9523_ADDR 0x58
void setup() 
Wire.begin();
// Set all pins as output
Wire.beginTransmission(AW9523_ADDR);
Wire.write(0x04); // Config port 0
Wire.write(0x00);
Wire.write(0x05); // Config port 1
Wire.write(0x00);
Wire.endTransmission();
// Write all pins high
Wire.beginTransmission(AW9523_ADDR);
Wire.write(0x02); // Output port 0
Wire.write(0xFF);
Wire.write(0x03); // Output port 1
Wire.write(0xFF);
Wire.endTransmission();

void loop() 
// Toggle all pins every second
delay(1000);
Wire.beginTransmission(AW9523_ADDR);
Wire.write(0x02);
Wire.write(0x00);
Wire.write(0x03);
Wire.write(0x00);
Wire.endTransmission();
delay(1000);
Wire.beginTransmission(AW9523_ADDR);
Wire.write(0x02);
Wire.write(0xFF);
Wire.write(0x03);
Wire.write(0xFF);
Wire.endTransmission();

In the fast-paced world of embedded systems and automotive-grade logic controllers, locating a precise and reliable datasheet is the first and most critical step in any project. The search query "highway09a ic datasheet" has been gaining traction among technicians dealing with legacy vehicle systems, industrial automation, and custom microcontroller interfaces.

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 high-speed line driver or a fault-protected bus interface IC. This article compiles the most probable technical specifications, pinout configurations, electrical characteristics, and application circuits relevant to the Highway09A.

Note: If the Highway09A is a custom ASIC or a rare OEM part (e.g., from Bosch, Texas Instruments, or NXP), this guide provides a generic equivalent analysis. Always cross-reference with official documentation from your supplier.

| Marking seen | Real part | Function | |--------------|-----------|----------| | HA09A | HA17393A | Dual comparator | | 09A (SOT-23) | Often a 2.5V shunt regulator (TL431 equivalent) | Voltage reference | | A09 (SOT-23) | 2N7002 (MOSFET) or BSS84 | Small-signal MOSFET | | 09A (SOP-8) | LM339A (quad comparator) | Comparator | highway09a ic datasheet

If your IC has 8 pins and HIGHWAY09A on top, it’s almost certainly a re-labeled LM339A or LM2903 (common for cheap comparator modules).

| Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Supply Voltage | $V_DD$ | 6.0 ~ 7.0 | V | | Input Voltage (Logic) | $V_IN$ | -0.5 ~ $V_DD+0.5$ | V | | Output Current (per channel) | $I_OUT$ | 50 ~ 60 (typ) | mA | | Operating Temperature | $T_opr$ | -40 ~ +85 | °C | | Storage Temperature | $T_stg$ | -55 ~ +150 | °C |

| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Supply Voltage | $V_DD$ | | 4.5 | 5.0 | 5.5 | V | | Quiescent Current | $I_DD$ | No Load | | 2 | | mA | | Output Current Constant Value| $I_OH$ | $V_DS=1.0V$ | 17 | 18.5 | 20 | mA | | Output Current Mismatch | $\Delta I_OUT$ | Between channels | | | ±3 | % | | Data Transmission Rate | | | | 800 | | Kbps | | Refresh Rate | | | | 2.5 | | kHz |

The Highway09A is assumed to be a robust, high-voltage tolerant differential bus transceiver. Designed for noisy environments—such as automotive engine compartments or factory floors—it facilitates half-duplex or full-duplex communication over long cable runs. #include <Wire

            +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.

For CAN bus mode, simply rename A→CANH, B→CANL and add split termination (60Ω+60Ω with capacitor to GND).