HCPL-7721#500 Avago Technologies US Inc., HCPL-7721#500 Datasheet - Page 17
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HCPL-7721#500
Manufacturer Part Number
HCPL-7721#500
Description
OPTOCOUPLER 25MBD 6NS 8-SMD
Manufacturer
Avago Technologies US Inc.
Datasheet
1.HCPL-0720-000E.pdf
(19 pages)
Specifications of HCPL-7721#500
Package / Case
8-SMD Gull Wing
Voltage - Isolation
3750Vrms
Number Of Channels
1, Unidirectional
Current - Output / Channel
10mA
Data Rate
25MBd
Propagation Delay High - Low @ If
20ns
Input Type
Logic
Output Type
Push-Pull, Totem-Pole
Mounting Type
Surface Mount, Gull Wing
Isolation Voltage
3750 Vrms
Maximum Continuous Output Current
10 mA
Maximum Fall Time
8 ns
Maximum Rise Time
9 ns
Minimum Forward Diode Voltage
3750 Vrms
Output Device
Logic Gate Photo IC
Configuration
1 Channel
Maximum Baud Rate
25 MBps
Maximum Power Dissipation
150 mW
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
DRAIN/SHIELD
DRAIN/SHIELD
Figure 19. Isolated node with transceiver powered by the network.
Isolated Node Providing Power to the Network
Figure 20 shows a node providing power to the network.
The AC line powers a regulator which provides five (5)
volts locally. The AC line also powers a 24 volt isolated
supply, which powers the network, and another five-volt
regulator, which, in turn, powers the transceiver and iso-
lated (network) side of the two optocouplers. This meth-
od is recommended when there are a limited number of
devices on the network that don’t require much power,
thus eliminating the need for separate power supplies.
Figure 20. Isolated node providing power to the network.
17
SIGNAL
POWER
SIGNAL
POWER
NETWORK
SUPPLY
POWER
DEVICENET NODE
772x/072x
772x/072x
NODE/APP SPECIFIC
HCPL
NODE/APP SPECIFIC
HCPL
TRANSCEIVER
TRANSCEIVER
uP/CAN
* OPTIONAL FOR BUS V + SENSE
uP/CAN
772x/072x
772x/072x
HCPL
HCPL
5 V REG.
5 V REG.
772x/072x
NON ISO
*HCPL
REG.
5 V
AC LINE
SWITCHING
ISOLATED
SUPPLY
POWER
V+ (SIGNAL)
V– (SIGNAL)
V+ (POWER)
V– (POWER)
More importantly, the unique “dual-inverting” design of
the HCPL-772X/072X ensure the network will not “lock-
up” if either AC line power to the node is lost or the node
powered-off. Specifically, when input power (V
HCPL-772X/072X located in the transmit path is eliminat-
ed, a RECESSIVE bus state is ensured as the HCPL-772X/
072X output voltage (V
AC LINE
GALVANIC
ISOLATION
BOUNDARY
V+ (SIGNAL)
V– (SIGNAL)
V+ (POWER)
V– (POWER)
GALVANIC
ISOLATION
BOUNDARY
O
) go HIGH.
DD1
) to the