Datasheet

+3V to +5V, 2500V
RMS
Isolated RS-485/RS-422
Transceivers with ±15kV ESD Protection
Functional Tables
Table 1. Transmitting Logic
TRANSMITTING LOGIC
INPUTS OUTPUTS
DE DI Y Z
1110
1001
0 X High impedance High impedance
Table 2. Receiving Logic
RECEIVING LOGIC
INPUTS OUTPUTS
RE V
A
- V
B
RO1 RO2
0 >-10mV 1 1
0 <-200mV 0 0
0 Inputs open/shorted 1 1
1 >-10mV High impedance 1
1 <-200mV High impedance 0
1 Inputs open/shorted High impedance 1
Table 3. Fault Mode
NORMAL
MODE
FAULT MODES
FUNCTION
V
CC1
> V
UVH1
V
CC2
> V
UVH2
V
CC1
< V
UVL1
V
CC2
> V
UVH2
V
CC1
> V
UVH1
V
CC2
< V
UVL2
V
CC1
< V
UVL1
V
CC2
< V
UVL2
THERMAL
SHUTDOWN
INTERNAL
COMMUNICATION
FAULT
Transformer
driver
(ST1, ST2)
On On On On Off On
RE = 0 Active High High High High High
RE = V
CC1
High
impedance
High
impedance
High
impedance
High
impedance
High
impedance
High impedance
RO1
RE = floating Active
High
impedance
High
impedance
High
impedance
High
impedance
High impedance
RO2 Active Active Active Active Active Active
Driver outputs (Y, Z) Active
High
impedance
High
impedance
High
impedance
High
impedance
High impedance
Internal barrier
communication
Active Disabled Disabled Disabled Disabled
Communication
attempted
Fault indicator on RE
Low
(60µA pull-
down)
High
(100µA pullup)
High
(100µA pullup)
High
(100µA pullup)
High
(100µA pullup)
High
(100µA pullup)
MAX3535E/MXL1535E
18
Maxim Integrated
MAX3535E/MXL1535E