ISL3330_14 Datasheet, PDF (22/25 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)
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
D_Y
5
0
R_DIFF = 54Ω, C_L = 100pF
5
0
R_A
4
Y
3
2
Z
1
0
TIME (10ns/DIV)
FIGURE 31. RS-485, DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH (FAST DATA RATE)
7.5
5.0 V_OUT+
250kbps
2.5
ALL T_OUTS LOADED WITH 3kΩ TO GND
0
1 TRANSMITTER AT 250kbps or 400kbps,
OTHER TRANSMITTER AT 30kbps
-2.5
400kbps
-5.0
V_OUT -
-7.5
0
1000
400kbps
250kbps
2000
3000
4000
LOAD CAPACITANCE (pF)
5000
FIGURE 33. RS-232, TRANSMITTER OUTPUT VOLTAGE vs
LOAD CAPACITANCE
50
40
Y OR Z = LOW
30
20
V_OUT SHORTED TO GND
10
0
-10
Y OR Z = HIGH
-20
-30_{-40 -25}
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 35. RS-232, TRANSMITTER SHORT CIRCUIT
CURRENT vs TEMPERATURE
4
Z
3
2
Y
1
0
TIME (10ns/DIV)
FIGURE 32. RS-485, DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW (FAST DATA RATE)
7.5
5.0
V_OUT+
2.5
OUTPUTS STATIC
ALL T_OUTS LOADED WITH 3kΩ TO GND
0 _{AND AT V+ OR V-}
-2.5
-5.0
-7.5
-40 -25
V_OUT -
0
25
50
TEMPERATURE (°C)
75 85
FIGURE 34. RS-232, TRANSMITTER OUTPUT VOLTAGE vs
TEMPERATURE
C_L = 4000pF, 1 CHANNEL SWITCHING
5
DY
0
5
0
Y/A
-5
5
RA
0
2µs/DIV
FIGURE 36. RS-232, TRANSMITTER AND RECEIVER
WAVEFORMS AT 250kbps
22
FN6361.0
May 20, 2008