ISL4486 Datasheet, PDF (8/11 Pages) Intersil Corporation – 5V, Ultra High Speed, PROFIBUS, RS-485/RS-422 Transceivers

ISL4486, ISL81486
Typical Performance Curves V_CC = 5V, T_A = 25°C, ISL4486 and ISL81486; Unless Otherwise Specified
DI = 40Mbps
DI = 40Mbps
5
5
0
0
5
RO
0
5
RO
0
DRIVER+CABLE DELAY (~290ns)
3
1.5
A-B
0
-1.5
-3
TIME (10ns/DIV)
FIGURE 7. ISL4486 DRIVER AND RECEIVER WAVEFORMS
DRIVING 200 FEET (61 METERS) OF CAT5
CABLE (DOUBLE TERMINATED WITH 120Ω)
DRIVER+CABLE DELAY (~585ns)
3
1.5
A-B
0
-1.5
-3
TIME (10ns/DIV)
FIGURE 8. ISL4486 DRIVER AND RECEIVER WAVEFORMS
DRIVING 400 FEET (121 METERS) OF CAT5
CABLE (DOUBLE TERMINATED WITH 120Ω)
5
R_DIFF = 54Ω, C_L = 100pF
4
A/Y
3
2
B/Z
1
0
3
1.5
A/Y - B/Z
0
-1.5
-3
TIME (10ns/DIV)
FIGURE 9. ISL81486 DRIVER WAVEFORMS AT 30Mbps
PER FIGURE 4
120
100
80
60
40
20
0
0
1
2
3
4
5
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
8
950
900
DE = V_CC, RE = X
850
800
DE = GND, RE = X
750
700
-40 -25
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE
4
3.8
R_DIFF = 100Ω
3.6
3.4
3.2
3
R_DIFF = 54Ω
2.8
-40 -25
0
25
50
75 85
TEMPERATURE (°C)
FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE