MAX232-ACWE Datasheet, PDF (13/38 Pages) Maxim Integrated Products – +5V-Powered, Multichannel RS-232 Drivers/Receivers

MAX220–MAX249
+5V-Powered, Multichannel RS-232
Drivers/Receivers
Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations
TRANSMITTERS
RECEIVERS
ENTA ENTB ENRA ENRB
OPERATION
STATUS
MAX247 TA1–TA4 TB1–TB4
MAX248 TA1–TA4 TB1–TB4
RA1–RA4
RA1–RA4
RB1–RB5
RB1–RB4
MAX249 TA1–TA3 TB1–TB3
RA1–RA5
RB1–RB5
0
0
0
0 Normal Operation
All Active All Active All Active
All Active
0
0
0
1 Normal Operation
All Active All Active All Active
All High-Z, except
RB5 stays active on
MAX247
0
0
1
0 Normal Operation
All Active All Active All High-Z
All Active
0
0
1
1 Normal Operation
All Active All Active All High-Z
All High-Z, except
RB5 stays active on
MAX247
0
1
0
0 Normal Operation
All Active All High-Z All Active
All Active
0
1
0
1 Normal Operation
All Active All High-Z All Active
All High-Z, except
RB5 stays active on
MAX247
0
1
1
0 Normal Operation
All Active All High-Z All High-Z
All Active
0
1
1
1 Normal Operation
All Active All High-Z All High-Z
All High-Z, except
RB5 stays active on
MAX247
1
0
0
0 Normal Operation
All High-Z All Active All Active
All Active
1
0
0
1 Normal Operation
All High-Z All Active All Active
All High-Z, except
RB5 stays active on
MAX247
1
0
1
0 Normal Operation
All High-Z All Active All High-Z
All Active
1
0
1
1 Normal Operation
All High-Z All Active All High-Z
All High-Z, except
RB5 stays active on
MAX247
1
1
0
0
Shutdown
All High-Z
All High-Z
Low-Power
Receive Mode
Low-Power
Receive Mode
1
1
0
1
Shutdown
All High-Z
All High-Z
Low-Power
Receive Mode
All High-Z, except
RB5 stays active on
MAX247
1
1
1
0
Shutdown
All High-Z All High-Z All High-Z
Low-Power
Receive Mode
1
1
1
1
Shutdown
All High-Z All High-Z All High-Z
All High-Z, except
RB5 stays active on
MAX247
Maxim Integrated
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