This article is for informational purposes. Always refer to the official manufacturer datasheet for absolute technical specifications.
If the A1458 datasheet shows a zero-crossing circuit , this part is designed for solid-state relays (SSRs), not general-purpose switching.
: Approximately 35–45 ns (typical), with a maximum of 8 ns for some high-speed variants . a1458 optocoupler datasheet
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) : Max consumption of 1.2 mA per channel for power-sensitive layouts. Pinout Configuration and Packaging This article is for informational purposes
: Typically supports data rates up to 10–15 MBd .
Rin=5V−1.2V0.015A=3.8V0.015A≈253 Ωcap R sub i n end-sub equals the fraction with numerator 5 V minus 1.2 V and denominator 0.015 A end-fraction equals the fraction with numerator 3.8 V and denominator 0.015 A end-fraction is approximately equal to 253 space cap omega Safe standard value: . Step 2: Calculate the Output Pull-Up Resistor ( Rpullcap R sub p u l l end-sub : Approximately 35–45 ns (typical), with a maximum
If the original component sourced from UTSource or Heisener Electronics is unavailable, cross-reference the datasheet with these alternative part numbers depending on speed and pin-compatibility requirements: Single Channel, High Speed Optocouplers Technical Data
+---_---+ Pin 1| |Pin 8 VCC / Collector Pin 2| |Pin 7 Base / NC Pin 3| |Pin 6 Emitter Pin 4| |Pin 5 GND +-------+
(frequently simplified to A1458) is a specialized, high-performance, single-channel optocoupler designed for applications requiring high-speed data transmission and robust electrical isolation. Manufactured primarily by Broadcom (formerly Avago Technologies), this component is designed to bridge the gap between high-voltage systems and low-voltage logic circuits, offering superior noise immunity and speed.