MAX3221, MAX3223, MAX3243 1µA Supply-Current, True +3V To +5.5V RS-232 Transceivers With AutoShutdown

The MAX3221 MAX3223 MAX3243 achieve 1A supply current with Maxim's revolutionary AutoShutdown" feature. When the MAX3221 MAX3223 MAX3243 do not sense a valid signal level on their receiver inputs, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. As a result, the system saves power without changes 4dc to the existing BIOS or operating system.
The MAX3221 MAX3223 MAX3243 transceivers are 3V-powered EIA/TIA-232 and V.28/V.24 Communications Interfaces intended for notebook computer applications. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. A guaranteed data rate of 120kbps provides compatibility with popular software for communicating with personal computers.
The MAX3221 MAX3223 MAX3243 require only 0.1F capacitors in 3.3V operation, and CAN operate from input voltages ranging from +3.0V to +5.5V. They are ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5.0V-only systems that require true RS-232 performance.
The MAX3221 is a 1-driver/1-receiver 16-pin SSOP version of the 20-pin MAX3223 (2-driver/2-receiver). The MAX3243 3-driver/5-receiver, complete serial port is ideal for notebook or subnotebook computers. The MAX3243 includes one complementary always-active receiver. This receiver CAN monitor an external device (such as a modem) in shutdown, without forward biasing the Protection Diodes in a UART that may have VCC completely removed.
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX3221CDBG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221IDBE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221IPWRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221ECPWR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221EIPWR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221CPWR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IPWE4 Texas Instruments LINE TRANSCEIVER, PDSO16, GREEN, PLASTIC, TSSOP-16
MAX3221ECDBRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221EIDBRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221CDBR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221IDBG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221MDBREP Texas Instruments Enhanced Product 3-V To 5.5-V Single-Channel Rs-232 Line Driver/Receiver With Plus/-15-Kv Esd 16-SSOP -55 to 125
MAX3221ECPWRE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221EIPWRE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221CDBE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221IDB Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221IPWRE4 Texas Instruments LINE TRANSCEIVER, PDSO16, GREEN, PLASTIC, TSSOP-16
MAX3221ECPWG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221EIPWG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221CDB Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221CPWRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IPWR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221ECPWE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221EIPWE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221CDBRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221IDBR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221EIPWRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221CPWE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IDBRG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221ECDBG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221EIDBG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221CPWG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IPW Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221ECDBR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221EIDBR Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221CPW Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IDBRE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221ECDB Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP 0 to 70
MAX3221EIDB Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-SSOP -40 to 85
MAX3221CPWRE4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221IPWG4 Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221ECPW Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP 0 to 70
MAX3221EIPW Texas Instruments 3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver 16-TSSOP -40 to 85
MAX3221 's PackagesMAX3221 's pdf datasheet
MAX3221CAE SSOP
MAX3221CAET SSOP
MAX3221CAE-T SSOP
MAX3221EAE SSOP
MAX3221EAE-T SSOP
MAX3221EAET SSOP
MAX3221CUE-T TSSOP
MAX3221CUE TSSOP
MAX3221CUET TSSOP
MAX3221EUE TSSOP
MAX3221EUE-T TSSOP
MAX3221EUET TSSOP




MAX3221 Pinout, Pinouts
MAX3221 pinout,Pin out
This is one package pinout of MAX3221,If you need more pinouts please download MAX3221's pdf datasheet.

MAX3221 Application circuits
MAX3221 circuits
This is one application circuit of MAX3221,If you need more circuits,please download MAX3221's pdf datasheet.


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