SN75C3222 3-V To 5.5-V Multichannel RS-232 Compatible Line Driver/Receiver |

SN75C3222 (ACTIVE)

3-V To 5.5-V Multichannel RS-232 Compatible Line Driver/Receiver


Recommended alternative parts

  • TRSF3222E  -  The commercial temp device has the SAME FUNCTIONALITY/PINOUT as the compared device but includes enhanced IEC61000-4-2 ESD Protection.
  • SN75C3222E  -  TI recommends SN75C3222E in new designs. The SN75C3222E is an improved direct drop-in replacement for the SN75C3222


The SN65C3222 and SN75C3222 consist of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The 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. The 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.

The SN65C3222 and SN75C3222 can be placed in the power-down mode by setting PWRDOWN\ low, which draws only 1 µA from the power supply. When the devices are powered down, the receivers remain active while the drivers are placed in the high-impedance state. Also, during power down, the onboard charge pump is disabled, V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also can be placed in the high-impedance state by setting EN\ high.


  • Operates With 3-V to 5.5-V VCC Supply
  • Operates 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 Exceeds ±15 kV Using Human-Body Model (HBM)
  • Applications
    • Battery-Powered Systems, PDAs, Notebooks, Laptops, Palmtop PCs, and Hand-Held Equipment

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Parametrics Compare all products in RS-232

Drivers per package
Receivers per package
Logic voltage (Min) (V)
Data rate (Max) (kbps)
Main supply voltage (Nom) (V)
Operating temperature range (C)
Package Group
SN75C3222 SN65C3222
2     2    
2     2    
3.3     3.3    
1000     1000    
Powerdown     Auto-Powerdown    
15     15    
Catalog     Catalog    
0 to 70     -40 to 85    
SOIC | 20
TSSOP | 20    
SOIC | 20
SSOP | 20
TSSOP | 20