TRS3221E
- ESD Protection for RS-232 Pins
- ±15kV Human-Body Model (HBM)
- ±8kV (IEC 61000-4-2, contact discharge)
- ±15kV (IEC 61000-4-2, air-gap discharge)
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU v.28 standards
- Operates with 3V to 5.5V VCC supply
- Operates up to 250kbit/s
- One driver and one receiver
- Near chip-scale package, 16-pin VQFN (RGT, 82% smaller than TSSOP package)
- Low standby current: 1µA Typical
- External capacitors: 4 × 0.1µF
- Accepts 5V logic input with 3.3V supply
- Alternative high-speed pin-compatible device
(1Mbit/s)
- TRSF3221E
- Auto-powerdown feature automatically disables drivers for power savings
The TRS3221E is a single driver, single receiver RS-232 solution operating from a single VCC supply. The RS-232 pins provide IEC G1000-4-2 ESD protection. 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 a single 3V to 5.5V supply. These devices operate at data signaling rates up to 250kbit/s and a maximum of 30V/µs driver output slew rate.
Flexible control options for power management are available when the serial port is inactive. The auto-powerdown 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. If FORCEOFF is set low and EN is high, both the driver and receiver are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high.
With auto-powerdown enabled, the device is activated automatically when a valid signal is applied to the receiver input. The INVALID output notifies the user if an RS-232 signal is present at the receiver input. INVALID is high (valid data) if the receiver input voltage is greater than 2.7V or less than –2.7V, or has been between –0.3V and 0.3V for less than 30µs. INVALID is low (invalid data) if the receiver input voltage is between –0.3V and 0.3V for more than 30µs. Refer to Figure 6-5 for receiver input levels.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 |
|---|---|---|---|---|---|
| * | 데이터 시트 | TRS3221E 3V TO 5.5V Single-Channel RS-232 Line Driver and Receiver with ±15kV IEC ESD Protection In Small Package datasheet (Rev. C) | PDF | HTML | 2024. 12. 10 | |
| 애플리케이션 노트 | RS-232 Glossary and Selection Guide | PDF | HTML | 2023. 5. 23 | ||
| 애플리케이션 노트 | Understanding Power Requirements in RS-232 Applications (Rev. B) | 2013. 4. 26 | |||
| 애플리케이션 노트 | AN-438 Low Power RS-232C Driver and Receiver in CMOS (Rev. B) | 2013. 4. 26 | |||
| 애플리케이션 노트 | Removing Ground Noise in Data Transmission Systems | 2007. 10. 5 | |||
| 추가 자료 | RS-232 IEC ESD-Protected Devices From TI (Rev. A) | 2007. 7. 27 | |||
| 애플리케이션 노트 | Interface Circuits for TIA/EIA-232-F (Rev. A) | 2002. 9. 19 | |||
| 애플리케이션 노트 | Low-Voltage, Single-Supply 232-Standard Interface Solutions (Rev. A) | 2000. 9. 19 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
TRS3221RGTEVM — ESD 보호 평가 모듈을 지원하는 TRS3221EIRGTR 멀티 채널 RS-232 라인 드라이버/리시버
이 평가 모듈(EVM)은 RGT 패키지를 지원하는 TRS3221E 또는 TRSF3221E를 평가하는 데 사용됩니다. 모든 신호는 헤더 또는 테스트 포인트를 통해 사용 가능합니다. 충전 펌프 출력 V+ 및 V- 도 액세스할 수 있습니다. 이 보드는 데이터와 상호작용하고 터미널 블록의 CMOS 로직 레벨을 DB9 커넥터의 데이터 채널 및 흐름 제어 채널을 지원하는 RS-232 레벨로 제어합니다.
TIDA-060008 — RS-232 시그널을 RS-485 시그널로 변환하는 레퍼런스 설계
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| SSOP (DB) | 16 | Ultra Librarian |
| VQFN (RGT) | 16 | Ultra Librarian |
| SOT-23-THN (DYY) | 16 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.