SN65C3221 3 V to 5.5 V マルチチャネル RS-232 ライン・ドライバ/レシーバ |

この製品はすでに市場にリリースされており、ご購入できます。 一部の製品は、より新しい代替品を使用できる可能性があります。
3 V to 5.5 V マルチチャネル RS-232 ライン・ドライバ/レシーバ

3 V to 5.5 V マルチチャネル RS-232 ライン・ドライバ/レシーバ - SN65C3221


  • TRSF3221E  -  拡張温度範囲デバイスは、比較対象のデバイスと機能/ピン配置が同一ですが、拡張された IEC61000-4-2 ESD 保護に対応しています。
  • SN65C3221E  -  新規の設計には SN65C3221E をお勧めします。 SN65C3221E は、改善された直接差し替え可能な SN65C3221 の代替品です。
  • TRSF3221  -  拡張温度範囲デバイスは、機能とパラメータの点で、比較対象のデバイスと完全に同等です。


The SN65C3221 and SN75C3221 consist of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). These devices provide 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 1 Mbit/s and a driver output slew rate of 24 V/µs to 150 V/µs.

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 devices do 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 2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID\ is low (invalid data) if the receiver input voltage is between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels.


  • Operate With 3-V to 5.5-V VCC Supply
  • Operate up to 1 Mbit/s
  • Low Standby Current ...1 µA Typical
  • External Capacitors ...4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • RS-232 Bus-Pin ESD Protection Exceedsb ±15 kV Using Human-Body Model (HBM)
  • Auto-Powerdown Feature Automatically Disables Drivers for Power Savings
  • Applications
    • Battery-Powered, Hand-Held, and Portable Equipment
    • PDAs and Palmtop PCs
    • Notebooks, Sub-Notebooks, and Laptops
    • Digital Cameras
    • Mobile Phones and Wireless Devices


他の製品と比較 RS-232 メール Excelへダウンロード
Part number オーダー・オプション Drivers per package Receivers per package Logic voltage (Min) (V) Data rate (Max) (kbps) Main supply voltage (Nom) (V) Features ESD HBM (kV) Rating Operating temperature range (C) Package Group
SN65C3221 ご注文 1     1     3.3     1000     3.3
Auto-Powerdown     15     Catalog     -40 to 85     SSOP | 16
TSSOP | 16    
SN65C3221-Q1 サンプルは利用できません。 1     1     3.3     1000     3.3
Auto-Powerdown     15     Automotive     -40 to 85     TSSOP | 16    
SN75C3221 ご注文 1     1     3.3     1000     3.3
Auto-Powerdown     15     Catalog     0 to 70     SOIC | 16
SSOP | 16
TSSOP | 16