Optocoupler Datasheet — A1458

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, which is a dual operational amplifier (op-amp) and entirely different in function. STMicroelectronics schematic example of how to connect the A1458 to a microcontroller like an HCPL-A1458 | In Stock | Utsource

Links the feedback loop from the secondary regulated output back to the primary PWM controller while keeping the dangerous mains voltage isolated.

Minimum 50 kV/µs transient immunity, allowing the device to clean up signal lines in highly polluted electromagnetic environments. Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub

Pro Tip: CTR degrades over time and with heat. Always design your circuit with a safety margin. a1458 optocoupler datasheet

| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | |-----------|--------|-------------|-----|-----|-----|------| | Forward Voltage | V_F | I_F = 20 mA | 1.2 | 1.4 | 1.6 | V | | Reverse Leakage | I_R | V_R = 6 V | - | - | 10 | μA | | Capacitance | C_in | V=0V, f=1MHz | - | 30 | - | pF |

Scenario: Isolating a 24V PLC output to a 3.3V microcontroller input.

The A1458 is a . It consists of an infrared light-emitting diode (LED) on the input side, optically coupled to an NPN silicon phototransistor on the output side. The coupling is achieved via a transparent insulating layer, typically providing isolation up to 5,000V RMS.

For standard optocouplers like the A1458, the CTR can range anywhere from depending on the specific bin/grade. user wants a long article about the "a1458

Searching for an "A1458 optocoupler datasheet" can sometimes lead to confusion, as the "A1458" marking appears on several different electronic components. A quick search might bring up a PNP transistor like the , which is used for general-purpose amplification and high-speed switching. However, for the vast majority of electronics engineers and hobbyists, the search for the "A1458 optocoupler datasheet" refers to a specific family of high-performance optocouplers manufactured by Avago Technologies (now a part of Broadcom). These are high-speed, logic-output optocouplers designed for robust electrical isolation in demanding digital systems.

In the world of electronics design, isolation is king. Whether you are protecting a sensitive microcontroller from high-voltage industrial machinery or simply eliminating ground loops in an audio circuit, the optocoupler (or optoisolator) is the silent guardian.

Because the A1458 combines high noise immunity with fast switching times, it is predominantly used in demanding industrial systems: HCPL-1458/ A1458 - Broadcom - Price, Inventory & Datasheets

A1458 Optocoupler Datasheet: Features, Applications, and Technical Specifications The HCPL-A1458 I'll follow the search plan as outlined

Because of its high speed and robust isolation, the A1458 is a staple in several critical industries: Optocouplers and Opto-Isolators - Broadcom Inc.

Ensures that TTL/CMOS logic signals are not disrupted by ground loops or noise.

| Model | CTR (%) | V_CEO (V) | t_on/t_off (μs) | Isolation (Vrms) | Best For | |-------|---------|-----------|-----------------|------------------|-----------| | | 50-600 | 80 | 5/4 | 5,000 | General purpose, wide CTR | | PC817 | 50-600 | 35 | 4/3 | 5,000 | SMPS feedback (lower V_CEO) | | 4N35 | 100 (min) | 30 | 10/10 | 5,000 | Hobbyist, older designs | | 6N137 | - (logic) | 7 | 0.075 | 5,000 | High-speed data (10 Mbps) |