ISL33354E Datasheet, PDF (5/23 Pages) Intersil Corporation – Full fail-safe (open/short) RS-485/422 port 2 Rx

ISL33354E, ISL33357E
PORT
1
2
2
SHDN
1
1
1
INPUTS
RE485
N.A.
0
0
TABLE 3. ISL33354E AND ISL33357E FUNCTION TABLE
RECEIVER OUTPUTS
DRIVER OUTPUTS
DE485 SLOW485 RO
R1OUT
AND
R2OUT
Y AND Z
T1OUT AND
T2OUT
CHARGE
PUMPS
(Note 4)
N.A.
N.A.
N.A.
ON
N.A.
ON
ON
0
0
ON
N.A.
High-Z
N.A.
ON
1
0
ON
N.A.
ON
N.A.
ON
2
1
1
1
0
High-Z
N.A.
ON
2
1
0
0
1
ON
N.A.
High-Z
2
1
0
1
1
ON
N.A.
ON
N.A.
ON
N.A.
ON
N.A.
ON
2
1
1
1
1
High-Z
N.A.
1 and 2
0
X
X
X
High-Z
High-Z
NOTE:
4. Charge pumps are off if SHDN = 0. If SHDN = 1, the charge pumps are on.
ON
High-Z
N.A.
ON
High-Z
OFF
DRIVER
DATA
RATE
(bps)
MODE
460k RS-232
115k RS-485 Rx
115k RS-485 Tx
and Rx
115k RS-485 Tx
20M RS-485 Rx
20M
RS-485 Tx
and Rx
20M RS-485 Tx
N.A. Shutdown
Truth Tables
SHDN
1
1
1
1
0
RS-232 TRANSMITTING (PORT 1)
INPUTS
OUTPUTS
T1IN
T2IN
T1OUT
T2OUT
0
0
1
1
0
1
1
0
1
0
0
1
1
1
0
0
X
X
High-Z
High-Z
RS-485 TRANSMITTING (PORT 2)
INPUTS
OUTPUTS
SHDN DE485 DI SLOW485 Y
Z DATA RATE (bps)
1
1
0
0
0
1
115k
1
1
1
0
1
0
115k
1
1
0
1
0
1
20M
1
1
1
1
1
0
20M
1
0
X
X High-Z High-Z
N.A.
0
X
X
X High-Z High-Z
N.A.
SHDN
1
1
1
1
1
0
RS-232 RECEIVING (PORT 1)
INPUTS
OUTPUTS
R1IN
R2IN
R1OUT
R2OUT
0
0
1
1
0
1
1
0
1
0
0
1
1
1
0
0
Open
Open
1
1
X
X
High-Z
High-Z
SHDN
1
1
1
1
0
RS-485 RECEIVING (PORT 2)
INPUTS
RE485
A-B
0
≥-40mV
0
≤-200mV
0
Open or shorted together
1
X
X
X
OUTPUT
RO
1
0
1
High-Z
High-Z
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5
FN8775.1
October 21, 2016