The A1458 bridges the gap between low-power logic controllers (such as MCUs and FPGAs) and high-power electrical subsystems. According to the engineering data on UTSOURCE.net , the module features specific electrical and isolation performance profiles:
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit | |--------------------------|--------|-------------------------|-----|-----|-----|-------| | LED forward voltage | VF | IF = 20 mA | 1.1 | 1.2 | 1.4 | V | | LED reverse current | IR | VR = 6 V | - | - | 10 | µA | | Collector dark current | ICEO | VCE = 20 V, IF = 0 | - | - | 100 | nA | | Current transfer ratio | CTR | IF = 5 mA, VCE = 5V | 50 | 300 | 600 | % | | Collector-emitter sat. | VCE(sat)| IF = 10 mA, IC = 2 mA | - | 0.2 | 0.4 | V | | Isolation resistance | RISO | VIO = 500 Vdc | 10¹¹| - | - | Ω | | Capacitance (input-output)| CIO | f = 1 MHz | - | 1.0 | - | pF |
If the A1458 datasheet shows a zero-crossing circuit , this part is designed for solid-state relays (SSRs), not general-purpose switching. a1458 optocoupler datasheet
: Contains a GaAsP LED that emits infrared light when current is applied. Output Side
Traditional phototransistor optocouplers suffer from severe speed limitations caused by base-collector capacitance. The A1458 bypasses this limitation by decoupling the photo-detecting diode from the output amplifying transistor stages. This structural choice slashes internal capacitance, dropping response delays down to the nanosecond range and allowing accurate square-wave reproduction. 2. High Common Mode Transient Immunity (CMTI) The A1458 bridges the gap between low-power logic
The (also commonly referred to as the Go to product viewer dialog for this item.
| Rank | CTR (%) @ IF=5mA, VCE=5V | |------|--------------------------| | A | 50 – 150 | | B | 100 – 300 | | C | 200 – 400 | | D | 300 – 600 | : Contains a GaAsP LED that emits infrared
peak on similar parts), reference the official semiconductor foundry specifications to ensure safety compliance. ⚙️ Core Operational Principles
Operates with a maximum supply current ( ICCcap I sub cap C cap C end-sub
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