Datasheet

Driver Input
Receiver Output
120 Ω 120 Ω
Receiver Output
Driver Input
0
5
10
15
20
25
30
35
40
45
Driver
Receiver
0.05 0.5 1 2 5 10 20
− Average Supply Current − mA
f − Frequency − MHz
30
I
CC
−15
−10
−5
0
0 1 2 3
−20
−25
V − Input Voltage − V
−30
4 5
I
I
− Logic Input Current − Aµ
I
SN65LBC179A
SN75LBC179A
www.ti.com SLLS377D –MAY 2000– REVISED SEPTEMBER 2011
TYPICAL CHARACTERISTICS
Figure 5. Typical Waveform of Non-Return-To-Zero (NRZ), Pseudorandom Binary Sequence (PRBS)
Data at 100 Mbps Through 15m, of CAT 5 Unshielded Twisted Pair (UTP) Cable
TIA/EIA-485-A defines a maximum signaling rate as that in which the transition time of the voltage transition of a
logic-state change remains less than or equal to 30% of the bit length. Transition times of greater length perform
quite well even though they do not meet the standard by definition.
AVERAGE SUPPLY CURRENT LOGIC INPUT CURRENT
vs vs
FREQUENCY INPUT VOLTAGE
Figure 6. Figure 7.
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