ST3222EB Datasheet, PDF (1/15 Pages) STMicroelectronics – +/-15 kV ESD protected, 3 to 5.5 V low power, up to 250 Kbps, RS-232 drivers and receivers

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 µA supply current
■ 250KBps minimum guarantee data rate
■ 6 V/µs minimum guarantee slew rate
■ Meet EIA/TIA-232 specification down to 3 V
■ Available in SSOP20 and TSSOP20
TSSOP
SSOP
Description
The ST3222E is a 3 V powered EIA/TIA-232 and
V.28/V.24 communications interface with low
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.
Typical applications are Notebook, Sub-notebook
and Palmtop Computers, Battery Powered
Equipment, Hand-Held Equipment, Peripherals
and Printers.
Table 1. Device summary
Order codes
Temperature
range
ST3222ECPR 0 to 70 °C
ST3222EBPR -40 to 85 °C
ST3222ECTR
ST3222EBTR
0 to 70 °C
-40 to 85 °C
Package
SSOP20 (tape and reel)
SSOP20 (tape and reel)
TSSOP20 (tape and reel)
TSSOP20 (tape and reel)
Packaging
1350 parts per reel
1350 parts per reel
2500 parts per reel
2500 parts per reel
January 2008
Rev 8
1/15
www.st.com
15