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3.3-V/5-V Multichannel RS-232 Line Driver/Receiver


Package | PIN: DB | 28
Temp: C (0 to 70)
Carrier: Partial Tube
Qty Price
1-9 $5.39
10-24 $4.85
25-99 $4.52
100-249 $3.96
250-499 $3.71
500-749 $3.15
750-999 $2.66
1000+ $2.54


  • Single-Chip and Single-Supply Interface for IBM PC/ATTM Serial Port
  • Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.11 Standards
  • Operates With 3.3-V or 5-V Supplies
  • One Receiver Remains Active During Standby (Wake-up Mode)
  • Designed to Operate at 128 kbit/s Over a 3-m Cable
  • Low Standby Current...5 uA Max
  • ESD Protection on RS-232 Pins Meets or Exceeds 4 kV (HBM) and 1.5 kV (HBM) on All Pins Per MIL-STD-883, Method 3015
  • External Capacitors...0.1 uF
  • (VCC = 3.3 V...Five External Capacitors)
  • (VCC = 5 V...Four External Capacitors)
  • Accepts 5-V Logic Input With 3.3-V Supply
  • Applications
    • RS-232 Interface
    • Battery-Powered Systems, PDAs
    • Notebook, Laptop, and Palmtop PCs
    • External Modems and Hand-Held Terminals
  • Packaged in Shrink Small-Outline Package

Patent-pending design

IBM and PC/AT are trademarks of International Business Machines Corporation.

Texas Instruments  SN75LV4737ADB

The SN75LV4737A consists of three line drivers, five line receivers, and a charge-pump circuit. It provides the electrical interface between an asynchronous communication controller and the serial-port connector, and meets the requirements of TIA/EIA-232-F. This combination of drivers and receivers matches those needed for the typical serial port used in an IBM PC/AT or compatibles. The charge pump and five small external capacitors allow operation from a single 3.3-V supply, and four capacitors allow operation from a 5-V supply.

The device has flexible control options for power management when the serial port is inactive. A common disable for all of the drivers and receivers is provided with the active-high STBY input. The active-low EN\ input is an enable for one receiver to implement a wake-up feature for the serial port. All the logic inputs can accept signals from controllers operating from a 5-V supply, even though the SN75LV4737A is operating from 3.3 V.

The SN75LV4737A is characterized for operation over the temperature range of 0°C to 70°C.