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ISL3330_14 Datasheet, PDF (3/25 Pages) Intersil Corporation – 3.3V, ±15kV ESD Protected, Dual Protocol (RS-232/RS-485) Transceivers
◁
ISL3330, ISL3331
TABLE 2. ISL3330 FUNCTION TABLE
485/232
0
INPUTS
ON RXEN DEN SLEW
1
0
0 N/A
RECEIVER
OUTPUTS
RA
High-Z
RB
High-Z
DRIVER OUTPUTS
Y
Z
High-Z High-Z
DRIVER
SPEED
(Mbps)
-
0
1
0
1 N/A High-Z High-Z
ON
ON
0.46
0
1
1
0 N/A
ON
ON
High-Z High-Z
-
0
1
1
1 N/A
ON
ON
ON
ON
0.46
0
0
0
1 N/A High-Z High-Z
ON
High-Z
0.46
0
0
1
0 N/A High-Z
ON
ON
High-Z
0.46
0
0
1
1 N/A
ON
ON
ON
ON
0.46
X
0
0
0
X High-Z High-Z High-Z High-Z
-
1
1
0
0
X High-Z High-Z High-Z High-Z
-
1
X
0
1 1/0 High-Z High-Z
ON
ON
20/0.46
1
X
1
0
X
ON
High-Z High-Z High-Z
-
1
1
1
1 1/0
ON
High-Z
ON
ON
20/0.46
1
0
1
1 1/0
ON
High-Z
ON
ON
20/0.46
NOTES:
1. Charge pumps are on if in RS-232 mode and ON or DEN or RXEN are high.
2. Loopback is enabled when ON = 0, and DEN = RXEN = 1.
CHARGE
PUMPS LOOPBACK
(Note 1) (Note 2)
MODE
ON
OFF
RS-232
ON
OFF
RS-232
ON
OFF
RS-232
ON
OFF
RS-232
ON
OFF
RS-232
ON
OFF
RS-232
ON
ON
RS-232
OFF
OFF
Shutdown
OFF
OFF
RS-485
OFF
OFF
RS-485
OFF
OFF
RS-485
OFF
OFF
RS-485
OFF
ON
RS-485
ISL3330 Truth Tables
485/232
0
0
0
0
0
RS-232 TRANSMITTING MODE
INPUTS (ON = 1)
OUTPUTS
DEN
DY
DZ
Y
Z
1
0
0
1
1
1
0
1
1
0
1
1
0
0
1
1
1
1
0
0
0
X
X
High-Z High-Z
RS-485 TRANSMITTING MODE
INPUTS (ON = 1)
OUTPUTS
485/232 DEN DY SLEW Y
1
1
0
1
1
DATA RATE
Z
(Mbps)
0
20
1
1
1
1
0
1
20
1
1
0
0
1
0
0.46
1
1
1
0
0
1
0.46
1
0
X
X High-Z High-Z
-
485/232
0
0
0
0
0
0
RS-232 RECEIVING MODE
INPUTS (ON = 1)
OUTPUT
RXEN
A
1
0
B
RA
RB
0
1
1
1
0
1
1
0
1
1
0
0
1
1
1
1
0
0
1
Open
Open
1
1
0
X
X
High-Z High-Z
485/232
1
1
1
1
RS-485 RECEIVING MODE
INPUTS (ON = 1)
OUTPUT
RXEN
1
B-A
≥ -40mV
RA
RB
1
High-Z
1
≤ -200mV
0
High-Z
1 Open or Shorted together 1
High-Z
0
X
High-Z High-Z
3
FN6361.0
May 20, 2008
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