SN75LV4737A 3.3-V/5-V Multichannel RS-232 Line Driver/Receiver |


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



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.


  • 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.


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Part number Order Drivers per package Receivers per package Logic voltage (Min) (V) Data rate (Max) (kbps) Main supply voltage (Nom) (V) ESD HBM (kV) Rating Operating temperature range (C) Package Group
SN75LV4737A Order now 3     5     3.3     128     3.3
4     Catalog     0 to 70     SSOP | 28