Low Power +3V to +5.5V, 250Kbps RS232 Transceivers (Features 18/20-pin, Receiver Disable)

Add Favorites


The ZT32xxE series devices are 3V powered EIA/TIA-232 and V.28/V.24 communication interfaces with low power requirements. They consist of two line drivers, two line receivers and the proprietary switch-capacitor regulated voltage converters. The ZT3220E has a 1Tx and 1Rx configuration. These devices operate 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 RS232 I/O pins exceeding ±15kV EN61000-4-2 Air Gap Discharge and ±8Kv EN61000-4-2 Contact Discharge.

The ZT3221E and ZT3223E features the AUTOGREEN (patent pending) proprietary 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 a connected peripheral device is turned off.


● Meets EIA/TIA-232F and CCITT V.28/V.24 specifications for Vcc at +3.3V ±10% and +5V ±10%
● Low Quiescent Current: 0.5mA typ., 1mA max
● Low Shutdown Current (where applicable): 1μA typical, 10μA max
● Guaranteed Data Rate 250Kbps
● Proprietary Switch-Capacitor Regulated Voltage Converters (patent pending)
● Proprietary AUTOGREEN Power Saving (patent pending)
● Latch-up Free
● ESD Protection for RS-232 I/O’s
-- ±15kV Human Body Model (HBM)
-- ±15kV EN61000-4-2 Air Gap Discharge
-- ±8kV EN61000-4-2 Contact Discharge
● Drop-in Replacements for MAX3220E, SP3220E, MAX3221E, ICL3221E, MAX3222E, ICL3222E, SP3222E, MAX3223E, ICL3223E, SP3223E, MAX3232E, ICL3232E, SP3232E, LT1385, SP385E, IS3232E
● High Data Rate at 1000Kbps Available on ZT32xxF Series

Target Applications

Battery-Powered And Hand-Held Applications
Notebooks, Subnotebooks, and Palmtops
Industrial and Embedded PCs
Data Cables for Cell Phones and PDAs
Terminal Adapters and POS terminals
Peripherals interface
Routers and HUBs



Technical Documentation

Product Brief, Product Introduction and Datasheet

ZT1385E Product Brief

Release Date

File Size
149.0 KB

ZT1385E Datasheet


Release Date

File Size
1.9 MB