A1458 Optocoupler | Datasheet Updated

Example order code: A1458-B (CTR rank B)

The (often referred to as A1458 ) is a high-speed, single-channel logic gate optocoupler manufactured by Broadcom (formerly Avago). It is designed to bridge the gap between high-speed digital circuits while providing excellent electrical isolation. ⚡ Key Specifications

Why choose the A1458 over alternatives?

| 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) |

): Flexible architecture supporting , making it instantly compatible with standard 3.3V and 5V microcontroller logic levels. Current Consumption ( ICCcap I sub cap C cap C end-sub ): Energy-efficient design pulling a maximum of 1.2 mA . a1458 optocoupler datasheet

As environment temperatures rise, the maximum allowable collector power dissipation falls, meaning maximum system current must be derated. 6. Applications of the A1458 Optocoupler

The A1458 is not an ultra-high-speed device (like a logic gate optocoupler, e.g., 6N137), but it is adequate for most power supply feedback and low-speed data isolation (< 50 kHz).

package. While you should always verify with the official diagram from Broadcom's technical data

Operating the device beyond these limits can cause permanent damage. All ratings are measured at an ambient temperature ( TAcap T sub cap A ) of 25°C unless otherwise specified. TSTGcap T sub cap S cap T cap G end-sub -55 to +125 Operating Temperature TAcap T sub cap A -40 to +85 Forward Input Current (Continuous) IFcap I sub cap F Peak Transient Input Current Example order code: A1458-B (CTR rank B) The

The first page gives a summary of the device, including its basic description (optocoupler, containing a GaAsP LED and high-gain photo detector), key features, a simplified schematic, and typical applications.

The A1458 is functionally equivalent to the industry-standard PC817 . However, the A1458 often features tighter CTR binning and slightly better high-temperature dark current performance.

This comprehensive guide serves as an expanded datasheet overview, detailing the technical specifications, pin configuration, internal architecture, and practical applications of the A1458 optocoupler. 1. Introduction to the A1458 Optocoupler

): Typically operates between 4.5V and 5.5V (TTL compatible). | Dimension | Min (mm) | Max (mm)

This open-collector output design makes it simple to interface the A1458 with TTL or CMOS logic operating from various supply rails.

CTR is the gain of an optocoupler: (I_C / I_F) * 100%. The A1458 offers multiple rank options:

Ensure the forward current ( IFcap I sub cap F