The TRS3221 device consists of one line driver, one line receiver with dedicated enable pin, and a dual charge-pump circuit with ±15-kV ESD protection pin-to-pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from one 3-V to 5.5-V supply. The TRS3221 device operates at data signaling rates up to 250 kbps and a maximum of 30-V/µs driver output slew rate.
Flexible control options for power management are available when the serial port is inactive. The automatic power-down feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled and the supply current is reduced to 1 µA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TRS3221 3-V to 5.5-V RS-232 Line Driver and Receiver With ±15-kV ESD Protection datasheet (Rev. A) | PDF | HTML | 29 Jun 2015 |
| Certificate | TRS3221RGTEVM EU RoHS Declaration of Conformity (DoC) | 08 Dec 2020 | ||
| Application note | RS-232 Frequently Asked Questions | 10 Nov 2020 | ||
| Application note | AN-438 Low Power RS-232C Driver and Receiver in CMOS (Rev. B) | 26 Apr 2013 | ||
| Application note | Understanding Power Requirements in RS-232 Applications (Rev. B) | 26 Apr 2013 | ||
| Application note | Removing Ground Noise in Data Transmission Systems | 05 Oct 2007 | ||
| Application note | Interface Circuits for TIA/EIA-232-F (Rev. A) | 19 Sep 2002 | ||
| Application note | Low-Voltage, Single-Supply 232-Standard Interface Solutions (Rev. A) | 19 Sep 2000 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 16 | View options |
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