Low Power +3V to +5.5V, 1000Kbps RS232 Transceivers (Features 18/20-pin, Receiver Enable)

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The ZT32xxF 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 ZT3220F has a 1Tx and 1Rx configuration. These devices operate from a single 3V to 5.5V power supply at the guaranteed data rate of 1000K 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 ZT3221F and ZT3223F 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 High Data Rate 1000Kbps
● 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, SP3222EU, MAX3223E, ICL3223E, SP3223EU, MAX3232E, ICL3232E, SP3232EU, LT1385 and SP385E
● Standard Data Rate at 250Kbps Available on ZT32xxE 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

ZT3222F Product Brief

Release Date

File Size
76.9 KB

ZT3222F Datasheet


Release Date

File Size
1.9 MB