
12
HFCT-5612
Transmitter Electrical Characteristics
(T
A
= 0°C to +60°C, V
CC
= 4.75 V to 5.25 V)
Receiver Electrical Characteristics
(T
A
= 0°C to +60°C, V
CC
= 4.75 V to 5.25 V)
Notes:
1. Open collector TTL compatible.
2. 4 k7 to 10 k pull-up on host to V
CC
.
3. Rising edge of TX_DISABLE to fall of output signal below 10% of nominal.
4. Falling edge of TX_DISABLE to rise of output signal above 90% of nominal.
5. From power on or hot plug after V
DD
T >4.75 V or From negation of TX_DISABLE during reset of TX_FAULT.
6. From occurrence of fault (output safety violation or V
DD
T <4.5 V).
7. TX_DISABLE HIGH before TX_DISABLE set LOW.
8. 20% to 80% response time.
Parameter Symbol Min. Typ. Max. Unit Notes
Transmitter
Differential Input Voltage
±TX_DAT 650 2000 mV p-p
Transmit Fault Load TX_FAULT
Load
4.7 10 k 1
Transmit Fault Output - Low TX_FAULT
L
0.0 0.5 V
Transmit Fault Output - High TX_FAULT
H
V
CC
-0.5
V
CC
+0.3
V2
TX_DISABLE Assert Time t_off 3 10 µsec 3
TX_DISABLE Negate Time t_on 0.5 1 msec 4
Time to initialize, includes reset
of TX_FAULT
t_init 30 300 msec 5
TX_FAULT from fault to assertion t_fault 20 100 µsec 6
TX_DISABLE time to start reset t_reset 10 µsec 7
Parameter Symbol Min. Typ. Max. Unit Notes
Receiver
Differential Output Voltage
±RX_DAT 370 2000 mV p-p
Receiver Output Rise Time t
rRX_DAT
0.35 ns 8
Receiver Output Fall Time t
fRX_DAT
0.35 ns 8
Receiver Loss of Light Load RX_LOS
Load
4.7 10 k 1
Receiver Loss of Signal
Output Voltage - Low
RX_LOS
L
0.0 0.5 V
Receiver Loss of Signal
Output Voltage - High
RX_LOS
H
V
CC
-0.5
V
CC
+0.3
V2
Receiver Loss of Signal
Assert Time (off to on)
t
A,RX_LOS
100 µs
Receiver Loss of Signal
Deassert Time (on to off)
t
D,RX_LOS
100 µs
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