+5V-Powered, Multichannel RS-232Drivers/ReceiversMAX220–MAX249

Table 1a. MAX245 Control Pin Configurations

ENT0011

ENR0101

OPERATION STATUSNormal OperationNormal OperationShutdownShutdown

TRANSMITTERS

All ActiveAll ActiveAll 3-StateAll 3-State

All ActiveAll 3-State

All Low-Power Receive ModeAll 3-State

RECEIVERS

Table 1b. MAX245 Control Pin Configurations

ENT001

ENR010

OPERATIONSTATUSNormal OperationNormal OperationShutdown

TRANSMITTERSTA1–TA4All ActiveAll ActiveAll 3-State

TB1–TB4All ActiveAll ActiveAll 3-State

All ActiveRA1–RA4 3-State,RA5 ActiveAll Low-PowerReceive ModeRA1–RA4 3-State,RA5 Low-PowerReceive Mode

RECEIVERS

RA1–RA5

RB1–RB5All ActiveRB1–RB4 3-State,RB5 ActiveAll Low-PowerReceive ModeRB1–RB4 3-State,RB5 Low-PowerReceive Mode

11ShutdownAll 3-StateAll 3-State

Table 1c. MAX246 Control Pin Configurations

ENA001

ENB010

OPERATIONSTATUSNormal OperationNormal OperationShutdown

TRANSMITTERSTA1–TA4All ActiveAll ActiveAll 3-State

TB1–TB4All ActiveAll 3-StateAll Active

All ActiveAll ActiveRA1–RA4 3-State,RA5 ActiveRA1–RA4 3-State,RA5 Low-PowerReceive Mode

RECEIVERS

RA1–RA5

RB1–RB5All ActiveRB1–RB4 3-State,RB5 ActiveAll ActiveRB1–RB4 3-State,RA5 Low-PowerReceive Mode

11ShutdownAll 3-StateAll 3-State

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