high-speed, single-channel optocoupler (also known as the HCPL-A1458 ) manufactured by Avago/Agilent
Common Mode Rejection (CMR): Minimum of 15,000 V/µs (often reaching 50 kV/μs in newer models like the HCPL-1458) . Supply Voltage ( VCCcap V sub cap C cap C end-sub
In the world of electronics, protecting sensitive control circuits from high-voltage spikes is a top priority. One of the most reliable ways to achieve this isolation is through an optocoupler. While many engineers are familiar with the standard 4N25 or PC817 series, the A1458 optocoupler (often part of the HCPL-1458 or similar proprietary series) is a specialized component designed for specific industrial and signal-processing tasks. a1458 optocoupler datasheet
| Parameter | Typical Expected Value | Why It Matters | | :--- | :--- | :--- | | Isolation Voltage (VISO) | 3,750 Vrms – 5,000 Vrms | Safety compliance (UL, VDE). For A1458, check if it meets reinforced insulation. | | Current Transfer Ratio (CTR) | 50% – 600% (depending on bin) | The gain of the coupler. Low CTR (<50%) indicates an old or slow device. | | Rise/Fall Time (tr/tf) | 2 – 18 µs | Determines max switching speed (typically < 100 kHz for standard types). | | Input Forward Current (IF) | 50 mA (max) / 10 mA (typical) | Prevents burning out the internal LED. |
Hermetically Sealed Options: Available in hermetic versions (HCNW1458) for high-reliability military or aerospace applications. Primary Applications HCPL-A1458 | In Stock | Utsource While many engineers are familiar with the standard
Check the Speed: The A1458 is a standard speed optocoupler. It is great for low-frequency signals (relays, buttons, power switching). It is not suitable for high-speed data transmission (like Ethernet or high-speed SPI), as the transistor has a "saturation delay" (turn-off time) that slows the signal down.
Before diving into electrical characteristics, let us establish the pinout. The A1458 is typically housed in a 4-pin DIP (Dual Inline Package). The A1458 optocoupler datasheet usually presents the following pin assignments (viewed from top): | | Current Transfer Ratio (CTR) | 50%
: Delivers impressive performance with typical propagation delays as low as and data rates reaching up to Exceptional Noise Immunity
The device is widely available in surface-mount SOP-8 or SOIC-8 packages, as well as 8-pin DIP formats for through-hole mounting. Some high-reliability versions are hermetically sealed for use in aerospace or harsh industrial environments. HCPL-1458/ A1458 - Broadcom - Price, Inventory & Datasheets