1458 Optocoupler Datasheet [upd] Jun 2026

Exceeding I_F = 60mA degrades the LED. The isolation voltage (5 kV_RMS) is the primary advantage over non-isolated solutions.

Traditional general-purpose optocouplers encounter a bottleneck: the large base-collector capacitance of standard phototransistors slows down signal transitions, resulting in prolonged propagation delays.

Logic signal output pin (Typically Open-Collector or Logic Gate) VEcap V sub cap E No connection or enable function (variant dependent) Pin 8 VCCcap V sub cap C cap C end-sub Positive supply voltage for output circuit bias Note: Datasheets recommend placing a

The is a high-performance part. However, because components occasionally go out of production or face supply constraints, designers sometimes need alternatives. 1458 optocoupler datasheet

Positive terminal of the Channel 2 input LED.

The Current Transfer Ratio is the ratio of output collector current ( ICcap I sub cap C ) to input forward current ( IFcap I sub cap F ), expressed as a percentage:

Route input LED traces parallel and close together to minimize loop areas, reducing susceptibility to electromagnetic interference (EMI). Exceeding I_F = 60mA degrades the LED

This section lists the maximum values that the component can withstand without being damaged:

The 1458 optocoupler provides an efficient, space-saving solution for dual-channel electrical isolation challenges. Offering high common-mode transient immunity, predictable current transfer ratios, and a compact 8-pin footprint, it bridges the gap between basic slow-speed optocouplers and expensive high-speed digital isolators.

Internal isolation spacer; must be left floating on the PCB layout. Logic signal output pin (Typically Open-Collector or Logic

| Feature | Description / Typical Value | Key Benefit | | :--- | :--- | :--- | | | Data rates up to 15 Mbit/s; typical t PHL /t PLH propagation delays are often as low as 8 ns . | Enables fast and reliable digital communication, suitable for high-speed data transmission. | | High Isolation Voltage | Ranges from 3,750 V rms up to 5,300 V rms , providing robust galvanic isolation. | Protects low-voltage control circuitry from high-voltage hazards and transients. | | TTL Compatibility | Logic output is fully compatible with Transistor-Transistor Logic (TTL) levels. | Allows for direct interfacing with standard digital logic families without extra level-shifting components. | | High Current Transfer Ratio (CTR) | For the HCPL-1458-500E , the CTR is > 500% at an input current (I F ) of 5 mA. | A high CTR means the output can be driven strongly with a very small input current, improving efficiency. | | High Common-Mode Transient Immunity (CMTI) | Minimum of 15 kV/µs for basic models; advanced models achieve up to 75 kV/µs . | Provides excellent immunity to electrical noise, ensuring stable performance in harsh industrial environments. | | Wide Operating Temperature | Typically from -40°C to +100°C , with some variants extending to -55°C to +100°C. | Guarantees reliable operation in demanding applications ranging from automotive to industrial. | | Dual-Channel Option | Some variants, like the HCNW1458, integrate two independent optocoupler channels in a single package. | Saves valuable board space and reduces component count for more compact designs. |

Pin 1: Anode Pin 2: Cathode Pin 3: No connection (NC) Pin 4: Emitter Pin 5: Collector Pin 6: Base (optional; leave open for standard operation)

Rin=Vin−VFIF=24 V−1.25 V0.01 A=2275 Ω≈2.2 kΩcap R sub i n end-sub equals the fraction with numerator cap V sub i n end-sub minus cap V sub cap F and denominator cap I sub cap F end-fraction equals the fraction with numerator 24 V minus 1.25 V and denominator 0.01 A end-fraction equals 2275 cap omega is approximately equal to 2.2 k cap omega Assuming a minimum CTR of 50%, an IFcap I sub cap F of 10 mA guarantees a available collector current ( ICcap I sub cap C ) of 5 mA. To guarantee logic low separation on a 5V MCU:

Note: The 1458 features faster response times than standard phototransistor optocouplers, making it suitable for low-to-medium speed data transmission (up to 1-2 MBd). Common-Mode Rejection (CMR) 10,000