A1458 Optocoupler Datasheet ^hot^
, making it exceptionally resilient against rapid voltage changes. 5. Typical Application Circuits
Integrating the A1458 requires strict attention to the 8-pin mapping layout to prevent reverse polarity failures or unbuffered floating logic gates.
Measures the chip's ability to reject fast voltage transients across the isolation barrier without triggering false outputs. 1.2 mA (Maximum)
This open-collector output design makes it simple to interface the A1458 with TTL or CMOS logic operating from various supply rails. a1458 optocoupler datasheet
An optocoupler, or optoisolator, is a crucial component in modern electronics that transfers electrical signals between two isolated circuits using light. The (often associated with high-performance optical isolation) plays a vital role in protecting sensitive microcontrollers from high-voltage spikes, eliminating ground loops, and reducing electrical noise.
Most DIP-4 optocouplers follow a standard pinout. The A1458 likely adheres to this:
| Dimension | Min (mm) | Max (mm) | |-----------|----------|----------| | Length | 4.50 | 4.70 | | Width | 6.30 | 6.50 | | Height | 3.40 | 3.60 | | Lead pitch| 2.54 (nominal) | , making it exceptionally resilient against rapid voltage
that is TTL compatible, allowing it to interface directly with microcontrollers and digital logic. Common packages include
) meets the minimum threshold required to switch the output detector reliably, without exceeding the absolute maximum limit of 25mA.
When designing with the A1458, pay close attention to: Measures the chip's ability to reject fast voltage
What or switching frequency does your design require?
and other distributors suggest the following substitutes based on similar performance profiles:
The forward voltage drop of 1.2V-1.6V is typical for GaAs IR LEDs. When calculating current-limiting resistors for microcontroller outputs (e.g., 5V logic), use R = (V_OH - V_F) / I_F, where I_F is typically 5-20 mA.
): 30V to 70V (Depending on the specific manufacturer variant). 7V. Collector Current ( ICcap I sub cap C ): 50 mA maximum. Saturation Voltage (
Power Transistor Isolation. Feedback Element in. Switched Mode Power. Supplies. Replaces Pulse Transformers. • Replaces Slow. HCPL-A1458 | In Stock | Utsource