ISL33354E Datasheet, PDF (15/23 Pages) Intersil Corporation – Full fail-safe (open/short) RS-485/422 port 2 Rx

ISL33354E, ISL33357E
Typical Performance Curves V_CC = 5V, T_A = +25°C, unless otherwise specified (Continued)
60
C_L = 1000pF, 2 CHANNELS SWITCHING
5V
58
TxIN
0
56
V_IN = 5V
FULL TEMP RANGE
5V
TxOUT/RxIN
0
-5V
5V
RxOUT
0
1µs/DIV
FIGURE 26. RS-232, TRANSMITTER AND RECEIVER WAVEFORMS AT
500kbps
54
SR IN = 15V/µs
52
50
SR IN = 100V/µs
48
50
500
1000
1500
DATA RATE (kbps)
2000
FIGURE 27. RS-232, RECEIVER OUTPUT + DUTY CYCLE vs DATA RATE
1100
1000
900
V_OUT ±4V
BOTH T_OUTS LOADED WITH 5kΩ TO GND
800
700
2 TRANSMITTERS AT +25°C
600
1 TRANSMITTER AT +25°C
500
400
300
200 ^{1 TRANSMITTER AT +85°C}
2 TRANSMITTERS AT +85°C
100
100
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
FIGURE 28. RS-232, TRANSMITTER MAXIMUM DATA RATE vs LOAD
CAPACITANCE
450
2 TRANSMITTERS SWITCHING
400 ^{BOTH TOUTS LOADED WITH 3kΩ TO GND, CL = 1000pF}
350
+85°C
300
7.5
5.0 V_OUT+
2.5
+25°C
+85°C
2 TRANSMITTERS SWITCHING
0
BOTH T_OUTS LOADED WITH 5kΩ TO GND, C_L = 1000pF
-2.5
-5.0
+85°C
V_OUT -
+25°C
-7.5
0 100 200 300 400 500 600 700 800
DATA RATE (kbps)
FIGURE 29. RS-232, TRANSMITTER OUTPUT VOLTAGE vs DATA RATE
Die Characteristics
SUBSTRATE AND QFN PAD POTENTIAL
(POWERED UP):
GND
PROCESS:
BiCMOS
250
+25°C
200
150
50
150 250 350 450 550 650 750
DATA RATE (kbps)
FIGURE 30. RS-232, TRANSMITTER SKEW vs DATA RATE
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FN8775.1
October 21, 2016