Operates efficiently with low forward currents, making it directly compatible with CMOS and TTL logic circuits.
The A1458 is a standard speed optocoupler. It is great for low-frequency signals (relays, buttons, power switching). It is not suitable for high-speed data transmission (like Ethernet or high-speed SPI), as the transistor has a "saturation delay" (turn-off time) that slows the signal down.
Features a logic gate output, making it directly compatible with TTL and CMOS systems. a1458 optocoupler datasheet
| Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | | | | | | Forward Current | IF | 50 | mA | | Peak Forward Current (1µs pulse, 300pps) | IFP | 1 | A | | Reverse Voltage | VR | 6 | V | | Power Dissipation | PD | 70 | mW | | Output (Phototransistor side) | | | | | Collector-Emitter Voltage | VCEO | 80 | V | | Emitter-Collector Voltage | VECO | 6 | V | | Collector Current | IC | 50 | mA | | Collector Power Dissipation | PC | 150 | mW | | Total Device | | | | | Total Power Dissipation | PTOT | 200 | mW | | Isolation Voltage (for 1 min) | VISO | 5000 | Vrms | | Operating Temperature | TOPR | -55 to +110 | °C | | Storage Temperature | TSTG | -55 to +125 | °C |
When purchasing, look for the specific ordering code (e.g., HCPL-1458-000E) to confirm package style and RoHS compliance. Key procurement details include: Operates efficiently with low forward currents, making it
The CTR degrades with temperature and age. A typical rule of thumb is to derate the CTR by 50% after 10 years of continuous operation at 50°C.
CTR is defined as (IC / IF) * 100% . For the A1458, CTR varies by sub-grade: It is not suitable for high-speed data transmission
Understanding the A1458 Optocoupler: Features, Specs, and Applications
By integrating two independent channels into a single compact package, the A1458 allows designers to save valuable printed circuit board (PCB) real estate while managing multiple isolated signal lines simultaneously. Key Features