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.