1458 Optocoupler Datasheet ((full))

Isolating line receivers and data transmission systems like RS-485 or CAN bus .

Top View (Notch facing left or up) ---- Notch ---- | 1 o o 6 | | 2 o o 5 | | 3 o o 4 | ------------

The is a high-speed, dual-channel logic gate optocoupler often manufactured by Broadcom (formerly Avago/Agilent) . It is designed for applications requiring robust electrical isolation and fast data transmission, such as industrial control and telecommunications. Key Specifications According to technical data , the HCPL-1458 features: Channels : 2 unidirectional channels. Data Rate : Up to 10 MBd (10 Mbps).

Just remember to double-check that you haven't accidentally picked up a 1458 Op-Amp! 1458 optocoupler datasheet

ceramic capacitor near the power supply pin of the output receiving circuit to filter out noise caused by fast switching transitions.

If the HCPL-1458 or A1458 is unavailable due to its specialized, legacy, or obsolete status, engineers often cross-reference it with alternative high-speed 8-pin optocouplers:

The HCPL-1458 is typically housed in an or DIP-8 package. While specific internal diagrams vary by variant, a standard high-speed 8-pin optocoupler often follows this general layout: Isolating line receivers and data transmission systems like

| Parameter | Symbol | Value (Typical) | Unit | |-----------|--------|----------------|------| | Rise Time | t_r | 2 | µs | | Fall Time | t_f | 2 | µs | | Turn-on Time | t_on | 3 | µs | | Turn-off Time | t_off | 3 | µs |

Signal isolation for battery management systems (BMS) or electric motor controllers.

+5V (MCU Power) +24V (External Supply) | | [R1] (Current Limiter) +------+ | | | +---|-----------------------+ [Relay] [D1] (Flyback) | | | | | | _|_ (Pin 1: Anode) | +------+ | \ / | | | V (Internal LED) | (Pin 5: Collector) --+ | --- | |/ | | (Pin 2: Cathode) |---------------------------| (Internal Transistor) +---|-----------------------+ |>\ | (Pin 4: Emitter) --+ [MCU Output Pin] | | GND (24V Ground) Use code with caution. Component Selection Calculations 1. Input Current Limiting Resistor ( R1cap R sub 1 To target a safe forward current ( IFcap I sub cap F ) of 10 mA using a 5V logic signal: VCC=5 Vcap V sub cap C cap C end-sub equals 5 V Key Specifications According to technical data , the

Typically 8 ns to 35 ns (depending on specific testing conditions and sub-variants like the HCPL-1458#060), allowing for high-frequency signal transmission.

| Parameter | Symbol | Typical Value (4N35) | | :--- | :--- | :--- | | Forward Current (LED side) | IF | 60 mA | | Reverse Voltage (LED) | VR | 6 V | | Collector-Emitter Voltage | VCEO | 30 V | | Emitter-Collector Voltage | VECO | 7 V | | Power Dissipation (Output) | PC | 150 mW | | Operating Temperature | TOPR | -55°C to +100°C |

| Parameter | Min | Typ | Max | Unit | |-----------|-----|-----|-----|------| | Input forward current | 1 | 10 | 20 | mA | | Supply voltage (output) | - | 5 | 24 | V | | Collector load resistance | 1 | 10 | 100 | kΩ | | Ambient temperature | -25 | 25 | 85 | °C |