ST3222CTR STMicroelectronics

ST3222B ST3222C 3 to 3.6 V, low power, up to 400 kbps RS-232 drivers and receivers Features 300 A supply current 250 kbps minimum guarantee data rate 6 V/s minimum guarantee slew rate Meet EIA/TIA-232 specification down to 3 V TSSOP20 Description The ST3222 is a 3 V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements and high data-rate capabilities. ST3222 has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 3.6 V power supplies. The device requires only four small 0.1 mF standard external capacitors for operating from 3 V supply. The ST3222 has two receivers and two drivers. The ST3222 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. Typical applications are notebooks, sub- notebooks and palmtop computers, battery powered equipment, hand-held equipment, peripherals and printers. Table 1. Device summary Temperature Order codes Package Packaging range ST3222CTR 0 to 70 C TSSOP20 (tape and reel) 2500 parts per reel ST3222BTR -40 to 85 C TSSOP20 (tape and reel) 2500 parts per reel August 2010 Doc ID 7512 Rev 7 1/13 www.st.com 1Contents ST3222B - ST3222C Contents 1 Pin configuration 3 2 Maximum ratings 4 3 Electrical characteristics . 5 3.1 Receiver electrical characteristics . 6 4 Application . 7 4.1 Typical performance characteristics 8 5 Package mechanical data . 9 6 Revision history . 12 2/13 Doc ID 7512 Rev 7