Offers flexible voltage compatibility across 3.3V and 5V microcontroller logic domains. 50 kV/µs (Minimum)
[ INPUT SIDE ] [ OUTPUT SIDE ] Pin 2 (Anode) ○───┐ ┌───○ Pin 8 (VCC) │ │ ▼ ──┐ ┌─┴─┐ ▲ │ │ │ Photodetector & └─┬─┘ └───┤ Logic Gate IC │ _│_│ Pin 3 (Cathode) ○────┘ /// │──○ Pin 6 (V_OUT) │ ─┴─ ○ Pin 5 (GND)
Engineers specify the A1458 primarily for its fast operational speed, robust transient immunity, and resilient packaging. The technical parameters typically outlined on page one of the device's technical data include: a1458 optocoupler datasheet
Do not exceed the forward current of 50mA on the input diode. Exceeding 60mA will rapidly degrade the LED's light output, permanently lowering the CTR.
) : Max consumption of 1.2 mA per channel for power-sensitive layouts. Pinout Configuration and Packaging Offers flexible voltage compatibility across 3
When a 5V microcontroller needs to control a 12V or 24V industrial relay, direct connection risks blowing out the MCU if the relay coils kick back high inductive voltages.
The —frequently cataloged in manufacturer portfolios as the HCPL-1458 , HCPL-A1458 , or HCNW1458 —is a premier, hermetically sealed, high-speed digital logic gate optoisolator. Originally engineered by Avago Technologies (now Broadcom), this component targets demanding electronic layouts requiring absolute electrical isolation. It acts as a safety barrier and noise-reduction bridge between low-voltage digital control circuits (like microcontrollers) and high-voltage power networks. Exceeding 60mA will rapidly degrade the LED's light
Search the manufacturer prefix (e.g., "Sharp A1458" or "Vishay A1458") – the first three letters often reveal the true brand.
): Typically operates between 4.5V and 5.5V (TTL compatible).
CTR is the gain of an optocoupler: (I_C / I_F) * 100%. The A1458 offers multiple rank options: