MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
12 ______________________________________________________________________________________
ENT ENR
OPERATION STATUS TRANSMITTERS RECEIVERS
0 0 Normal Operation All Active All Active
0 1 Normal Operation All Active All 3-State
1 0 Shutdown All 3-State All Low-Power Receive Mode
1 1 Shutdown All 3-State All 3-State
Table 1a. MAX245 Control Pin Configurations
ENT ENR
OPERATION
STATUS
TRANSMITTERS RECEIVERS
TA1–TA4 TB1–TB4 RA1–RA5 RB1–RB5
0 0 Normal Operation All Active All Active All Active All Active
0 1 Normal Operation All Active All Active
RA1–RA4 3-State,
RA5 Active
RB1–RB4 3-State,
RB5 Active
1 0 Shutdown All 3-State All 3-State
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1 1 Shutdown All 3-State All 3-State
RA1–RA4 3-State,
RA5 Low-Power
Receive Mode
RB1–RB4 3-State,
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 0 Normal Operation All Active All Active All Active All Active
0 1 Normal Operation All Active All 3-State All Active
RB1–RB4 3-State,
RB5 Active
1 0 Shutdown All 3-State All Active
RA1–RA4 3-State,
RA5 Active
All Active
1 1 Shutdown All 3-State All 3-State
RA1–RA4 3-State,
RA5 Low-Power
Receive Mode
RB1–RB4 3-State,
RA5 Low-Power
Receive Mode
