HCPL-4100 Avago Technologies US Inc., HCPL-4100 Datasheet - Page 11

• Manufacturer Part Number: HCPL-4100
• Description: OPTOCOUPLER TRANSMTTR 20MA 8-DIP
• Manufacturer: Avago Technologies US Inc.
• Type: Transmitterr

Specifications of HCPL-4100

• Mounting Type: Through Hole
• Voltage - Isolation: 3750Vrms
• Input Type: DC
• Voltage - Supply: 4.5 V ~ 20 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• No. Of Channels: 1
• Isolation Voltage: 3.75kV
• Optocoupler Output Type: Transistor
• Input Current: 250µA
• Output Voltage: 27V
• Opto Case Style: DIP
• No. Of Pins: 8
• Propagation Delay: 0.3µs
• Number Of Elements: 1
• Output Type: Open Collector
• Baud Rate: 20Kbps
• Output Current: 30mA
• Package Type: PDIP
• Operating Temp Range: 0C to 70C
• Power Dissipation: 0.36W
• Propagation Delay Time: 1600ns
• Pin Count: 8
• Mounting: Through Hole
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 516-1148-5

Figure 16. Full Duplex Point to Point Current Loop System Configuration.
As Figure 16 illustrates, the combination of Avago current
loop optocouplers, HCPL-4100 transmitter and HCPL-4200
receiver, can be used at the isolated end of current loops.
Cross talk and common mode coupling are greatly reduced
when optical isolation is imple mented at the same end of
both loops, as shown. Full duplex data rate is limited by the
non-isolated active transmitter current loop. Comments
mentioned under simplex configuration apply to the full
duplex case. Consult the HCPL-4200 receiver opto coupler
data sheet for specified device performance.
Half Duplex
The half duplex configuration, whether point to point or
multi drop, gives non-simultaneous bidirectional data flow
from transmitters to transmitters shown in Figures 17a and
17b. This configuration allows the use of two wires to carry
data back and forth between local and remote units. How-
ever, protocol must be used to determine which specific
transmitter can operate at any given time. Maximum data
rate for a half duplex system is limited by the loop current
charging time. These considera tions were explained in the
Simplex config ura tion section.
11
Figures 17a and 17b illustrate half duplex application for
the combination of HCPL-4100/-4200 optocouplers. The
unique and complementary designs of the HCPL-4100
transmitter and HCPL-4200 receiver optocoup lers provide
many designed-in benefits. For example, total optical isola-
tion at one end of the current loop is easily accom plished,
which results in substantial removal of common mode
influences, elimination of ground potential differences
and reduction of power supply requirements. With this
combina tion of HCPL-4100/-4200 opto couplers, specific
current loop noise immunity is provided, i.e., minimum
SPACE state current noise immunity is 1 mA, MARK state
noise immunity is 8 mA.
Voltage compliance of the current source must be of an
adequate level for operating all units in the loop while
not exceeding 27 V dc, the maximum breakdown voltage
for the HCPL-4100. Note that the HCPL-4100 transmitter
will allow output loop current to conduct when input V
power is off. Consult the HCPL-4200 receiver optocoupler
data sheet for specified device performance.
For more information about the HCPL-4100/-4200 opto-
couplers, consult Application Note 1018.
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