MAX14780E Maxim Integrated Products, MAX14780E Datasheet - Page 9

• Manufacturer Part Number: MAX14780E
• Description: RS-485/RS-422 Transceiver
• Manufacturer: Maxim Integrated Products

PIN
RE
X
X
0
1
1
2
3
4
5
6
7
8
INPUTS
NAME
DE
_______________________________________________________________________________________
GND
V
1
1
0
0
RO
RE
DE
DI
A
B
CC
TRANSMITTING
+5.0V, ±30kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
Receiver Output. When RE is low and if (A - B) R -50mV, RO is high; if (A - B) P -200mV, RO is low.
Receiver Output Enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive
RE high and DE low to enter low-power shutdown mode. RE is a hot-swap input (see the Hot-Swap
Capability section for details).
Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high impedance
when DE is low. Drive RE high and DE low to enter low-power shutdown mode. DE is a hot-swap
input (see the Hot-Swap Capability section for details).
Driver Input. With DE high, a low on DI forces noninverting output low and inverting output high.
Similarly, a high on DI forces noninverting output high and inverting output low.
Ground
Noninverting Receiver Input and Noninverting Driver Output
Inverting Receiver Input and Inverting Driver Output
Positive Supply V
DI
X
X
1
0
High-Z
B
0
1
OUTPUTS
Shutdown
CC
= +5.0V Q10%. Bypass V
RO
DE
RE
DI
High-Z
1
2
3
4
A
1
0
+
D
R
SO
8
7
6
5
RE
FUNCTION
0
0
0
1
1
V
B
A
GND
CC
CC
to GND with a 0.1FF capacitor.
INPUTS
DE
X
X
X
1
0
RECEIVING
Open/shorted
Pin Configuration
P -200mV
R -50mV
Pin Description
Function Tables
A-B
X
X
www.DataSheet4U.com
OUTPUTS
Shutdown
High-Z
RO
1
0
1
9