MAX3221
- RS-232 Bus-pin ESD protection exceeds ±15 kV using human body model (HBM)
- Meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards
- Operates with 3-V to 5.5-V VCC supply
- Operates up to 250 kbps
- One driver and one receiver
- Low standby current: 1 µA typical
- External capacitors: 4 × 0.1 µF
- Accepts 5-V logic input with 3.3-V supply
- Alternative high-speed pin-compatible device (1 Mbps)
- SNx5C3221
- Automatic power-down feature automatically disables drivers for power savings
The MAX3221 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 a single 3-V to 5.5-V supply. These devices operate 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.
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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 | MAX3221 3-V to 5.5-V RS-232 Line Driver and Receiver With ±15-kV ESD Protection datasheet (Rev. P) | PDF | HTML | 2021/7/19 |
設計與開發
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TIDM-AC-LED-COM — 具有 DALI DMX512 和電源線通訊的 AC 電源 LED 照明參考設計
此 LED 照明設計非常適合戶外、娛樂與工業照明應用，可提供高功率與高效率照明，並內建通訊網路。此照明單元由一個 250W 通用 AC 輸入 LED 驅動器電源供應器與一個展示用六串 LED 燈組成。LED 驅動器電源供應器以極佳的電源效率與電力利用率驅動 LED，在運作時可提供高於 90% 的電源效率以及 0.99 的功率因數 (PF)。此外，為了支援系統網路照明與遠端連線，此電源供應器包含對常見照明通訊標準的支援，包含數位可定址照明介面 (DALI)、DMX512 與電力線通訊 (PLC)。
| 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 |
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。