
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ENT
ENR
OPERATION STATUS
TRANSMITTERS
RECEIVERS
0
Normal Operation
All Active
0
1
Normal Operation
All Active
All High-Z
1
0
Shutdown
All High-Z
All Low-Power Receive Mode
1
Shutdown
All High-Z
Table 1a. MAX245 Control Pin Configurations
ENT
ENR
OPERATION
STATUS
TRANSMITTERS
RECEIVERS
TA1–TA4
TB1–TB4
RA1–RA5
RB1–RB5
0
Normal Operation
All Active
0
1
Normal Operation
All Active
RA1–RA4 High-Z,
RA5 Active
RB1–RB4 High-Z,
RB5 Active
1
0
Shutdown
All High-Z
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1
Shutdown
All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RB5 Low-Power
Receive Mode
Table 1b. MAX245 Control Pin Configurations
Table 1c. MAX246 Control Pin Configurations
ENA
ENB
OPERATION
STATUS
TRANSMITTERS
RECEIVERS
TA1–TA4
TB1–TB4
RA1–RA5
RB1–RB5
0
Normal Operation
All Active
0
1
Normal Operation
All Active
All High-Z
All Active
RB1–RB4 High-Z,
RB5 Active
1
0
Shutdown
All High-Z
All Active
RA1–RA4 High-Z,
RA5 Active
All Active
1
Shutdown
All High-Z
RA1–RA4 High-Z,
RA5 Low-Power
Receive Mode
RB1–RB4 High-Z,
RA5 Low-Power
Receive Mode
Control Pin Configuration Tables
12
Maxim Integrated
MAX220–MAX249