A1458 Optocoupler Datasheet Jun 2026
| Parameter | Symbol | Conditions | Typ | Max | Unit | |-----------|--------|-------------|-----|-----|------| | Rise Time | t_r | V_CE = 2V, I_C = 2mA, R_L = 100Ω | 4 | 18 | μs | | Fall Time | t_f | Same as above | 3 | 18 | μs | | Turn-On Time | t_on | I_F = 10 mA to I_C = 2mA | 5 | 20 | μs | | Turn-Off Time | t_off | Same | 4 | 20 | μs |
Use a series resistor at the input (Anode, Pin 1) to limit the LED current to within the recommended operating range (typically
: The HCPL-A1458 serves as an ideal intermediate buffer to drive the power stages of AC motor drives, solar inverters, and switching power supplies.
Features a maximum propagation delay (
Whether you are building a smart home switch or a power supply, the A1458 is a reliable, cost-effective component to keep in your parts bin.
Never connect the input pins directly to a power source. Use a resistor to limit the current ( IFcap I sub cap F ) to around 10–20mA for longevity.
When two systems operate on separate grounds (e.g., analog grounding vs. noisy digital motor grounding), connecting them directly can introduce ground loops and electrical interference. The A1458 isolates the two ground potentials perfectly. IV. Telecommunications Equipment a1458 optocoupler datasheet
The A1458/HCPL-1458 optocoupler is a premium choice for designs requiring high-speed data isolation without compromising safety. Its impressive common-mode immunity and fast switching capabilities make it an excellent choice for modern power and industrial automation applications.
: Unlike standard phototransistors, the A1458 uses an integrated photodetector and output transistor with separate connections for the photodiode bias and collector. This design reduces base-collector capacitance, allowing for speeds up to 100 times faster than conventional couplers.
It operates efficiently with low input drive currents, typically around 13 mA, making it compatible with most standard logic families. | Parameter | Symbol | Conditions | Typ
This is the most important table in any . Exceeding these values, even briefly, can destroy the device or compromise its isolation.
R1=VCC−VFIF=5V−1.2V0.01A=380 Ωcap R sub 1 equals the fraction with numerator cap V sub cap C cap C end-sub minus cap V sub cap F and denominator cap I sub cap F end-fraction equals the fraction with numerator 5 V minus 1.2 V and denominator 0.01 A end-fraction equals 380 cap omega (A standard resistor is a suitable choice).
(Pin 8) and GND (Pin 5) pins to suppress high-frequency noise. Use a resistor to limit the current (
The high-speed and high-isolation features make the A1458 suitable for:
: Compact 8-pin surface-mount footprints optimized for high-density automated PCB pick-and-place lines.