MAX3221EAE+ by Analog Devices

+3V to +5.5V RS-232 Transceivers with AutoShutdown

The MAX3221/MAX3223/MAX3243 achieve 1µA 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. The MAX3221/MAX3223/MAX3243 require only 0.1µF capacitors in 3.3V operation, and can operate from input voltages ranging from +3.0V to +5.5V. 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. The MAX3221 is a 1-driver/1-receiver 16-pin SSOP version of the 20-pin 2-driver/2-receiver MAX3223. The MAX3243 is a 3-driver/5-receiver with a complementary always-active receiver for external monitoring in a variety of 28 pin packages. Please see order information table for package offerings.

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Prices starting from US$1.14

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Integrated Charge Pump Circuitry Simplifies Power Requirements Eliminates the Need for a ±12V Supply Operation From a Single +3.3V or +5V Supply
Eliminates the Need for a ±12V Supply
Operation From a Single +3.3V or +5V Supply
1µA Supply Current in Shutdown Mode Saves Power AutoShutdown Feature is Enabled After No Activity on Receiver Inputs for 30μs Software Control Option for Shutdown
AutoShutdown Feature is Enabled After No Activity on Receiver Inputs for 30μs
Software Control Option for Shutdown


# Rx 1
# Tx 1
Data Rate (kbps) (min) 120
ICC (mA) (typ) 0.3
Internal Charge Pump Yes
External Caps 4
Cap. Value (µF) (nom) 0.1
Package/Pins SSOP/16TSSOP/16
BudgetaryPrice (See Notes) 1.86

MAX3221EAE+ Semiconductors - ICs by Analog Devices


Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock


Device Type Transceiver
IC Interface Type RS232
No. of Drivers 1Drivers
Supply Voltage Min 3V
Supply Voltage Max 5.5V
Driver Case Style SSOP
No. of Pins 16Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
MSL MSL 1 - Unlimited
Base Number 3221
Data Rate 235Kbps
Line Bus Drive Receive Transceiver Type Transmitter / Receiver
Logic Function Number 3221
Operating Temperature Range -40°C to +85°C
Supply Current 1µA
Supply Voltage Range 3V to 5.5V

Alternative Descriptions

RS232E 1xDr./Rec. -40/+85°C SSOP16 | Schukat Electronic
1µA Supply-Current, True +3V t | Analog Devices
IC: interface | Transfer Multisort Elektronik
TRANSCEIVE, SHUTDOWN, 3221, SSOP16 | element14
Transceive, Shutdown, 3221, Ssop16 | Newark Electronics

Frequently Asked Questions

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Is the MAX3221EAE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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