is a high-performance component manufactured by Avago Technologies (now Broadcom) . HCPL-1458 High-Gain Optocoupler The
Daisy-Chained Control Outputs. The LTC®1458/LTC1458L are complete single supply, quad rail-to-rail voltage output, 12-bit digital- Analog Devices Single Channel, High Speed Optocouplers Technical Data
The Current Transfer Ratio is the most critical parameter when designing with the 1458 optocoupler. It functions similarly to the DC current gain ( hFEh sub cap F cap E end-sub ) of a standard bipolar transistor.
Top View (Notch facing left or up) ---- Notch ---- | 1 o o 6 | | 2 o o 5 | | 3 o o 4 | ------------ 1458 optocoupler datasheet
Maintain adequate air separation between components on either side of the isolation plane to prevent high-voltage arcing.
. However, if you are strictly looking for an optocoupler, you are likely referring to the high-speed
or 8-pin widebody package, ensuring long-term reliability in harsh environments. Isolation: It functions similarly to the DC current gain
– The collector terminal of the output phototransistor. Connects to the output pull-up resistor or load.
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A Gallium Arsenide (GaAs) Infrared (IR) Light Emitting Diode. However, if you are strictly looking for an
Understanding the 1458 Optocoupler: Datasheet, Specifications, and Applications
VCE(sat)cap V sub cap C cap E open paren s a t close paren end-sub ]: Maximum 0.4 V ( Switching Speed (Typical) 2.0 to 5.0 Turn-Off Time ( tofft sub o f f end-sub ): 2.0 to 5.0
Among the sea of component numbers, "1458" appears frequently in search queries and parts lists. However, there is a critical distinction to make immediately: This confusion is common. Therefore, this article serves two purposes:
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | |-----------|--------|------------|-----|-----|-----|------| | Current Transfer Ratio (CTR) | CTR | ( I_F = 5 mA, V_CE = 5 V ) | 50 | 300 | 600 | % | | Collector-emitter saturation | ( V_CE(sat) ) | ( I_F = 10 mA, I_C = 2 mA ) | - | 0.2 | 0.4 | V | | Isolation resistance | ( R_ISO ) | ( V_IO = 500 V ) | ( 10^11 ) | - | - | Ω | | Isolation capacitance | ( C_ISO ) | ( V_IO = 0, f = 1 MHz ) | - | 1 | - | pF |