Datasheet

+5V-Powered, Multichannel RS-232
Drivers/Receivers
ENT ENR
OPERATION STATUS TRANSMITTERS RECEIVERS
0 0 Normal Operation All Active All Active
0 1 Normal Operation All Active All High-Z
1 0 Shutdown All High-Z All Low-Power Receive Mode
1 1 Shutdown All High-Z All High-Z
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 High-Z,
RA5 Active
RB1–RB4 High-Z,
RB5 Active
1 0 Shutdown All High-Z All High-Z
All Low-Power
Receive Mode
All Low-Power
Receive Mode
1 1 Shutdown All High-Z 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 0 Normal Operation All Active All Active All Active 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 1 Shutdown All High-Z 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
MAX220–MAX249