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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | 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 | ||
| 應用說明 | RS-232 Glossary and Selection Guide | PDF | HTML | 2023/5/23 | |||
| 應用說明 | Understanding Power Requirements in RS-232 Applications (Rev. B) | 2013/4/26 | ||||
| 應用說明 | AN-438 Low Power RS-232C Driver and Receiver in CMOS (Rev. B) | 2013/4/26 | ||||
| 應用說明 | Removing Ground Noise in Data Transmission Systems | 2007/10/5 | ||||
| 更多文件說明 | RS-232 IEC ESD-Protected Devices From TI (Rev. A) | 2007/7/27 | ||||
| 應用說明 | Interface Circuits for TIA/EIA-232-F (Rev. A) | 2002/9/19 | ||||
| 應用說明 | Low-Voltage, Single-Supply 232-Standard Interface Solutions (Rev. A) | 2000/9/19 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
TRS3221RGTEVM — 具有 ESD 保護功能的 TRS3221EIRGTR 多通道 RS-232 線路驅動器/接收器評估模組
此評估模組可用於評估 RGT 封裝的 TRS3221E 或 TRSF3221E。在接頭或測試點中可使用所有訊號。也可存取電荷泵輸出 V+ 和 V-。電路板將端子區塊上的資料與控制 CMOS 邏輯位準介接到 RS-232 位準，並在 DB9 連接器上支援資料通道和流量控制通道。
TIDA-060008 — 用於將 RS-232 訊號轉換爲 RS-485 訊號的參考設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| SSOP (DB) | 16 | Ultra Librarian |
| VQFN (RGT) | 16 | Ultra Librarian |
| SOT-23-THN (DYY) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。