21
FN6362.0
May 27, 2008
FIGURE 20. VL SUPPLY CURRENT vs VL VOLTAGE (QFN
ONLY)
FIGURE 21. VCC and VL SHDN SUPPLY CURRENTS vs VL
VOLTAGE (QFN ONLY)
FIGURE 22. RS-485,
DRIVER PROPAGATION DELAY vs
TEMPERATURE (SLOW DATA RATE, QFN ONLY)
FIGURE 23. RS-485,
DRIVER SKEW vs TEMPERATURE
(SLOW DATA RATE, QFN ONLY)
FIGURE 24. RS-485,
DRIVER PROPAGATION DELAY vs
TEMPERATURE (MEDIUM DATA RATE, QFN
ONLY)
FIGURE 25. RS-485,
DRIVER SKEW vs TEMPERATURE
(MEDIUM DATA RATE, QFN ONLY)
Typical Performance Curves VCC = VL = 3.3V, TA = +25°C; Unless Otherwise Specified (Continued)
0
10
20
30
40
50
60
1
1.5
2.0
2.5
3.0
3.5
4.0
I L
(
A)
VL (V)
VL ≤ VCC
VL > VCC
RS-232, DEN = SP = VL
RS-485,
DE = GN
D, SP =
DEN = VL
RS
-48
5, D
E =
SP
= G
ND
, DE
N =
V L
NO LOAD
VIN = VL or GND
LB = ON = VL, RXEN = GND
RS-2
32, D
EN =
GND
, SP
= VL
0
10
20
30
40
50
60
70
80
90
100
1
1.5
2.02.5
3.03.5
4.0
I CC
and
I
L
(A)
VL (V)
NO LOAD
VIN = VL or GND
LB = VL
ON = DZ/DE = DY = GND
RS-232/RS-485 ICC
RS
-48
5 I L
, S
P =
DE
N =
GN
D
RS-
232
I L,
SP
= D
EN
= G
ND
RS-
485
IL,
SP =
GND
, DE
N =
VL
RS-2
32 IL
, SP
= VL,
DEN
= GN
D
RS-232 IL, SP
= DEN = VL
1550
1560
1570
1580
1590
1600
1610
1620
1630
1640
-40
0
50
85
TEMPERATURE (°C)
-25
25
75
PROPAGATION
D
E
LA
Y
(n
s)
tDLH
tDHL
RDIFF = 54Ω, CL = 100pF
tDHL
0
50
100
150
200
250
300
-40
0
50
85
TEMPERATURE (°C)
SK
E
W
(
n
s
)
-25
25
75
|tPLHZ - tPHLY|
|tPHLZ - tPLHY|
|tDLH - tDHL|
RDIFF = 54Ω, CL = 100pF
-40
0
50
85
TEMPERATURE (°C)
-25
25
75
PROPAGATION
D
E
LA
Y
(n
s)
tDLH
tDHL
RDIFF = 54Ω, CL = 100pF
515
520
525
530
535
540
545
550
-40
0
50
85
TEMPERATURE (°C)
SK
EW
(n
s)
-25
25
75
0
2
4
6
8
10
12
14
16
RDIFF = 54Ω, CL = 100pF
|tPHLZ - tPLHY|
|tPLHZ - tPHLY|
|tDLH - tDHL|
ISL3332, ISL3333