ISL3330_14 Datasheet, PDF (21/25 Pages) Intersil Corporation – 3.3V, ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) Transceivers

ISL3330, ISL3331
Typical Performance Curves V_CC = V_L = 3.3V, T_A = +25°C; Unless Otherwise Specified (Continued)
24
R_DIFF = 54Ω, C_L = 100pF
23
22
21
t_DLH
20
19
t_DHL
18
17
16
15
-40 -25
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 25. RS-485, DRIVER PROPAGATION DELAY vs
TEMPERATURE (FAST DATA RATE)
3.0
R_DIFF = 54Ω, C_L = 100pF
2.5
|t_DLH - t_DHL|
2.0
1.5
|t_PHLZ - t_PLHY|
1.0
0.5
|t_PLHZ - t_PHLY|
0
-40 -25
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 26. RS-485, DRIVER SKEW vs TEMPERATURE
(FAST DATA RATE)
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
4
Y
3
2
Z
1
0
TIME (400ns/DIV)
FIGURE 27. RS-485, DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH (SLOW DATA RATE, QFN ONLY)
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
4
Z
3
2
Y
1
0
TIME (400ns/DIV)
FIGURE 28. RS-485, DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW (SLOW DATA RATE, QFN ONLY)
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
4
Y
3
2
Z
1
0
TIME (200ns/DIV)
FIGURE 29. RS-485, DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH (MEDIUM DATA RATE)
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
4
Z
3
2
Y
1
0
TIME (200ns/DIV)
FIGURE 30. RS-485, DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW (MEDIUM DATA RATE)
21
FN6361.0
May 20, 2008