is most famously associated with the classic MC1458 / LM1458 Dual Operational Amplifier
| Parameter | Symbol | Rating | Unit | |-----------|--------|--------|------| | Forward Current (LED) | I_F | 60 | mA | | Reverse Voltage (LED) | V_R | 6 | V | | Collector-Emitter Voltage | V_CEO | 30 | V | | Emitter-Collector Voltage | V_ECO | 7 | V | | Power Dissipation (Output) | P_out | 150 | mW | | Total Package Dissipation | P_tot | 250 | mW | | Isolation Test Voltage | V_ISO | 5000 | V_RMS | 1458 optocoupler datasheet
References
Protecting sensitive measurement systems from noisy ground loops. Motor Control: is most famously associated with the classic MC1458
The "1458 optocoupler datasheet" does not exist because the LM1458 is an operational amplifier, not an optoisolator. This paper has used that misconception as a pedagogical tool to emphasize the importance of precise part number verification and structured datasheet analysis. By dissecting a real optocoupler (4N35) datasheet, we have demonstrated how to interpret CTR, switching speeds, isolation ratings, and thermal limits. Engineers must always cross-reference component designations with manufacturer databases before proceeding with design. For optocoupler needs, one should select from established families like 4N, PC, HCPL, or CNY, never relying on vague or incorrect part numbers. This paper has used that misconception as a
Clarification: The number "1458" almost certainly refers to the LM1458 or UA1458 – a general-purpose dual operational amplifier. This paper addresses the probable user error and redirects focus toward actual optocoupler families (e.g., 4N××, PC×××, HCPL-××××, CNY××). For the purpose of this technical discussion, we will analyze a representative optocoupler, the 4N35, whose datasheet structure typifies the industry standard.
Before analyzing datasheet parameters, it is crucial to address the part number conflict.