ISL32437EIUZ-T7A Intersil, ISL32437EIUZ-T7A Datasheet - Page 3

• Manufacturer Part Number: ISL32437EIUZ-T7A
• Description: RS-422/RS-485 Interface IC 40V OVP POLV -40+85 5V RS-485 1/2 DUP
• Manufacturer: Intersil

Specifications of ISL32437EIUZ-T7A

• Product Category: RS-422/RS-485 Interface IC
• Rohs: yes
• Data Rate: 250 Kbps, 1 Mbps
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 4.5 mA
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: MSOP-8
• Function: Transceiver
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Shutdown: Yes

Truth Tables
NOTES:
Pin Configurations
Pin Descriptions
4. Parts without the INV pin follow the rows with INV = “0” and “X”.
NAME
GND
A/Y
PIN
RO
RE
DE
RE
DI
X
X
X
X
0
1
*Low Power Shutdown Mode (See Notes 13 and 18).
ISL32430E,
ISL32433E,
14 LD SOIC
ISL32430E, ISL32432E, ISL32433E, ISL32435E, ISL32437E
DE
1
1
1
1
0
0
N/A
6, 7
2
3
4
5
INPUTS
RO
RE
DE
DI
DI
10 LD MSOP
1
0
1
0
X
X
ISL32430E,
ISL32433E,
(8 LD SOIC, 8 LD MSOP)
ISL32432E, ISL32435E
1
2
3
4
N/A
TRANSMITTING
1
2
3
4
5
PIN NUMBER
TOP VIEW
R
D
INV (Note 4)
3
ISL32432E,
ISL32435E ISL32437E
0
0
1
1
X
X
(Continued)
1
2
3
4
5
6
8
7
6
5
V
B/Z
A/Y
GND
CC
High-Z*
High-Z
Y
1
0
0
1
N/A
OUTPUTS
1
3
4
5
6
High-Z*
High-Z
Receiver output. For parts without the cable invert function - or if INV is low - then: If
A - B ≥ -10mV, RO is high; if A - B ≤ -200mV, RO is low. If INV is high, then: If B - A ≥ -10mV,
RO is high; if B - A ≤ -200mV, RO is low. In all cases, RO = High if A and B are unconnected
(floating), or shorted together, or connected to an undriven, terminated bus (i.e., Rx is
always failsafe open, shorted, and idle, even if polarity is inverted).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE
is high. Internally pulled low.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high, and
they are high impedance when DE is low. Internally pulled high.
Driver input. For parts without the cable invert function - or if INV is low - a low on DI
forces output Y low and output Z high, while a high on DI forces output Y high and
output Z low. The output states, relative to DI, invert if INV is high.
Ground connection.
±40V Fault Protected and ±15kV ESD protected RS-485/RS-422 I/O pin. For parts
without the cable invert function - or if INV is low - A/Y is the non-inverting receiver input
and non-inverting driver output. If INV is high, A/Y is the inverting receiver input and
the inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
Z
0
1
1
0
NOTE: *Low Power Shutdown Mode (See Notes 13 and 18).
(Note 18)
RE
0
0
0
0
0
1
1
DE (Half
Duplex)
0
0
0
0
0
0
1
INV
RO
DE
DI
(8 LD SOIC, 8 LD MSOP)
1
2
3
4
FUNCTION
DE (Full
Duplex)
INPUTS
X
X
X
X
X
0
1
ISL32437E
TOP VIEW
R
D
RECEIVING
≥ -0.01V
≤ 0.01V
Open or
Shorted
≤ -0.2V
≥ 0.2V
Inputs
A-B
X
X
8
7
6
5
V
B/Z
A/Y
GND
CC
INV (Note 4)
0
0
1
1
X
X
X
March 1, 2012
OUTPUT
High-Z*
FN7920.0
High-Z
RO
1
0
1
0
1