SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP

SLLS130C - SEPTEMBER 1991 - REVISED MAY 1995

features

Single IC and Single 5-V Supply Interface for Serial Communication Ports
Meets or Exceeds the Requirements of ANSI Standards EIA/TIA-232-E-1991, EIA/TIA-562, and ITU Recommendation V.28
Switched-Capacitor Voltage Converter Eliminates Need for ±12-V Supplies
Voltage Converter Operates With Low Capacitance . . . 0.1 uF Min
Designed for Data Rates up to 120 kb/s Over 3-m Cable
Available in Shrink Small-Outline 25-mil- Pitch Package
Shutdown Mode to Save Power When Not in Use
±30-V Receiver Input Voltage Range
LinBiCMOS^TM Process Technology
Applications

Laptop or Notebook Computers
Portable Terminals
Single-Board Computers
Portable Test Equipment

LinBiCMOS and LinASIC are trademarks of Texas Instruments Incorporated.

description

The SN75LBC187 is a low-power LinBiCMOS^TM device containing three drivers, five receivers, and a switched-capacitor voltage converter. The SN75LBC187 provides a single chip and single 5-V supply interface between the asynchronous communications element and the serial port connector of the data terminal equipment (DTE). This device has been designed to conform to ANSI Standards EIA/TIA-232-E, EIA/TIA-562, and ITU recommendation V.28.

The switched-capacitor voltage converter of the SN75LBC187 uses four small external capacitors to generate the positive and negative voltages required by EIA/TIA-232-E (and V.28) line drivers from a single 5-V input. The drivers feature output slew-rate limiting to eliminate the need for external filter capacitors. The receivers can accept ±30 V without damage. The device also features a reduced power or shutdown mode that cuts the quiescent power to the IC when not transmitting data between the CPU and peripheral.

The SN75LBC187 has been designed using LinBiCMOS^TM technology and cells contained in the Texas Instruments LinASIC^TM library. The SN75LBC187 is characterized for operation from 0°C to 70°C.

NOTE: This device includes circuit designs and process technologies that have patents pending.

Title: MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP
Product Family: TRANSMITTERS AND RECEIVERS
Device Functionality: TRANSMITTERS/RECEIVERS
Orderable Devices: SN75LBC187DBLE

View the complete PDF datasheet: slls130c.pdf (111 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN75LBC187

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