ST3222ECTR STMicroelectronics

ST3222EB ST3222EC 15 kV ESD protected, 3 to 5.5 V low power, up to 250 Kbps, RS-232 drivers and receivers Features ESD protection for RS-232 I/O pins 15 kV human body model, 8 kV IEC 1000-4-2 contact discharge 300 A supply current 250KBps minimum guarantee data rate SSOP TSSOP 6 V/s minimum guarantee slew rate Meet EIA/TIA-232 specification down to 3 V Available in SSOP20 and TSSOP20 Description Typical applications are Notebook, Sub-notebook and Palmtop Computers, Battery Powered The ST3222E is a 3 V powered EIA/TIA-232 and Equipment, Hand-Held Equipment, Peripherals V.28/V.24 communications interface with low and Printers. power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to 8 kV using IEC1000-4-2 Contact Discharge and 15 kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5 V supplies with a dual charge pump. The charge pump requires only four small 0.1 mF external capacitors for operation form 3 V supply. The device has two receivers and two drivers. The ST3222E features a 1 mA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1 mA supply current. The device is guaranteed to run at data rates of 250 Kbps while maintaining RS-232 output levels. Table 1. Device summary Temperature Order codes Package Packaging range ST3222ECPR 0 to 70 C SSOP20 (tape and reel) 1350 parts per reel ST3222EBPR -40 to 85 C SSOP20 (tape and reel) 1350 parts per reel ST3222ECTR 0 to 70 C TSSOP20 (tape and reel) 2500 parts per reel ST3222EBTR -40 to 85 C TSSOP20 (tape and reel) 2500 parts per reel January 2008 Rev 8 1/15 www.st.com 15Contents ST3222E Contents 1 Pin configuration . 3 2 Absolute maximum ratings . 4 3 Electrical characteristics . 5 4 Application circuits . 7 5 Typical performance characteristics 8 6 Package mechanical data . 9 7 Revision history . 14 2/15