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3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver With +/-15-kV ESD Protection


Package | PIN: DB | 16
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.91
10-24 $2.61
25-99 $2.43
100-249 $2.11
250-499 $1.95
500-749 $1.64
750-999 $1.34
1000+ $1.23


  • 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 at Least 1 Mbit/s
  • Low Standby Current . . . 1 µA Typ
  • External Capacitors . . . 4 × 0.1 µF
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Designed to Be Interchangeable With industry Standard '3227 Devices
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection for RS-232 I/O Pins
    • ±15 kV - Human-Body Model
    • ±8 kV - IEC61000-4-2, Contact Discharge
    • ±8 kV - IEC61000-4-2, Air-Gap Discharge
  • Auto-Powerdown Plus Feature Automatically Disables Drivers for Power Savings
  • Packaged in Plastic Shrink Small-Outline Package
    • Battery-Powered, Hand-Held, and Portable Equipment
    • PDAs and Palmtop PCs
    • Notebooks, Sub-Notebooks, and Laptops
    • Digital Cameras
    • Mobile Phones and Wireless Devices

Texas Instruments  TRS3227IDBR

The TRS3227 consists 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). 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. This device operates at data-signaling rates of 1 Mbit/s in normal operating mode and a maximum of 30-V/µs driver output slew rate. This device also features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.

The TRS3227 achieves a 1-µA supply current using the auto-powerdown plus feature. This device automatically enters a low-power powerdown mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. It turns on again when it senses a valid transition at any driver or receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.

The TRS3227C is characterized for operation from 0°C to 70°C. The TRS3227I is characterized for operation from -40°C to 85°C.