Low Power 3V to 5.5V 3D/5R 250Kbps RS-232 Transceiver

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The AX3243E family is a 3V to 5.5V powered, low power, RS-232 transceiver for EIA/TIA-232 and V.28/V.24 RS-232 communication interfaces. It consists of three RS-232 line drivers, five RS-232 line receivers and the proprietary switch-capacitor regulated voltage converters. AX3243E operates from a single 3V to 5.5V power supply at the guaranteed data rate of 250K bits/sec with enhanced electrostatic discharge (ESD) protection in all RS-232 I/O pins, exceeding ± 15KV IEC61000-4-2 Air Gap Discharge and ±8KV IEC61000-4-2 Contact Discharge.

The AX3243E supports the proprietary AUTOGREEN power saving function which automatically powers down the on-chip regulated voltage converters and driver circuits when an RS-232 cable is disconnected from the host interface or when the connected peripheral device is turned off.


● Meets or Exceeds EIA/TIA-232F and CCITT V.28/V.24 Specifications for VCC at +3.3V ±10% and +5V ±10% Operations
● Interoperable with EIA/TIA-232 and adheres to EIA/ TIA-562 down to a +2.7V power source
● Low Quiescent Current – 1.5mA typical, 3mA max.
● Low Shutdown Current (where applicable) - 1μA typical, 10μA max.
● Guaranteed Data Rate 250Kbps
● Latch-up Free
● Proprietary Switch-Capacitor Regulated Voltage Converters
● Proprietary AUTOGREEN Power Saving
● ESD Protection for RS-232 I/O Pins
±15KV IEC61000-4-2 Air Gap Discharge
±8KV IEC61000-4-2 Contact Discharge
● 28-pin SSOP/TSSOP RoHS Compliant Package
● Operating Temperature Range: -40 to +85°C
● Drop-in Replacements for ZT3243E, MAX3243E, ICL3243E, ISL4243E, ST3243E and SP3243E
● High Data Rate at 1000Kbps Available on AX3243F

Target Applications

Battery-Powered And Hand-Held Applications
Industrial and Embedded PCs
Notebook/POS Terminals
Data Cables/Cradles for Cell Phones and PDAs
Industrial Cellular Routers/Gateways/Modems
Industrial Automation/DAQ Applications
Surveillance and Security Systems/Medical Equipment
RFID/Printer/Mouse/Barcode Scanner
Serial Communication/Peripheral Interface Applications



Technical Documentation

Product Brief, Product Introduction and Datasheet

AX3243E Product Brief

Release Date

File Size
261.4 KB

AX3243E Datasheet


Release Date

File Size
790.4 KB