Datasheet

11Maxim Integrated
40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
MAX14840E/MAX14841E
Function Table
X = Don’t care.
Note: Shutdown mode, driver, and receiver outputs are in high impedance.
Functional Diagram
RO
DI
A
B
DE
GND
V
CC
R
D
RE
SHUTDOWN
MAX14840E
MAX14841E
TRANSMITTING
INPUTS OUTPUTS
RE
DE DI B A
X 1 1 0 1
X 1 0 1 0
0 0 X High Impedance High Impedance
1 0 X Shutdown (see note)
RECEIVING (MAX14840E)
INPUTS OUTPUTS
RE
DE A-B RO
0 X
R 200mV
1
0 X
P -200mV
0
0 X Open/Shorted Previous State
1 1 X High Impedance
1 0 X Shutdown (see note)
RECEIVING (MAX14841E)
INPUTS OUTPUTS
RE
DE A-B RO
0 X
R -10mV
1
0 X
P -200mV
0
0 X Open/Shorted 1
1 1 X High Impedance
1 0 X Shutdown (see note)