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SN75LBC187

MULTICHANNEL EIA-232 DRIVER/RECEIVER

WITH CHARGE PUMP

SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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 µF 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 Process Technology

Applications

– Laptop or Notebook Computers

– Portable Terminals

– Single-Board Computers

– Portable Test Equipment

description

The SN75LBC187 is a low-power LinBiCMOS 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 technology and cells contained in the Texas

Instruments LinASIC 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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

DY3

DY1

DY2

RA2

RY2

DA2

DA1

RY1

RA1

GND

C1+

C1–

RA3

RY3

SHUTDOWN

RA4

RY4

DA3

RY5

RA5

C2–

C2+

DB PACKAGE

(TOP VIEW)

NC–No internal connection

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

LinBiCMOS and LinASIC are a trademarks of Texas Instruments Incorporated.

Summary of content (12 pages)

PAGE 1
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 D D D D D D D D D D 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.
PAGE 2
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 logic diagram (positive logic) logic symbol† VCC RA1 RY1 DY1 DA1 VDD RA2 RY2 VSS DY2 DA2 RA3 RY3 DY3 DA3 RA4 RY4 RA5 RY5 11 SHUTDOWN C1+ C1– C2+ C2– RA1 RA2 RA3 RA4 RA5 DA1 DA2 DA3 25 12 14 15 16 [PWR DOWN] C1+ 2 VCC –1.5 V C1– C2+ –2 VCC +1.
PAGE 3
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 recommended operating conditions Supply voltage, VCC DA High level input voltage, voltage VIH High-level NOM MAX 4.5 5 5.5 V 0.8 – 25 RY Low-level output current, IOL RY current IO Output current, VDD VSS V 2.
PAGE 4
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 switching characteristics over recommended operating conditions, TA = 25°C (unless otherwise noted) PARAMETER tPLH tPHL tr tf TEST CONDITIONS Propagation delay time, time lowlow to high-level high level output RL = 5 kΩ, Receiver See Figure 1 MAX UNIT CL = 50 pF, MIN 1.25 µs Driver RL = 3 kΩ, See Figure 2 CL = 1200 pF, 1.25 µs Receiver RL = 5 kΩ, See Figure 1 CL = 50 pF, 1.
PAGE 5
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 PARAMETER MEASUREMENT INFORMATION VCC VCC 1.5 kΩ IO Input Output CL = 50 pF (see Note A) 5 kΩ VIT, VI Input (see Note B) VO VIH 3V –3V tPHL VIL tPLH VOH 90% Output 10% VOL Figure 1. Receiver Test Circuit and Waveforms VCC IO Input Output VIT, VI CL = 1200 pF (see Note A) 3 kΩ VO 3V Input 50% 50% 0V tPHL tPLH tf Output 3V –3V tr 3V –3V VOH VOL NOTES: A.
PAGE 6
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 APPLICATION INFORMATION C1 0.1 µF 10 V 12 C3 0.1 µF 16 V 14 TL16C550 10 ACE 19 RI 20 DTR 22 CTS 6 SO 7 RTS 26 SI 5 DSR 8 DCD 11 5V + CS GND C1 C1– VDD RA5 RY5 DA3 DY3 RY4 RA4 DA2 DY2 SN75LBC187 DA1 DY1 RY3 RA3 RY2 RA2 RY1 RA1 VCC VSS SHUTDOWN C5 25 4.7 µF 6.
PAGE 7
SN75LBC187 MULTICHANNEL EIA-232 DRIVER/RECEIVER WITH CHARGE PUMP SLLS130C – SEPTEMBER 1991 – REVISED MAY 1995 MECHANICAL DATA DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 28 PIN SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,15 NOM 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°– 8° 1,03 0,63 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 / D 02/98 NOTES: A. B.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 11-Mar-2008 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN75LBC187DBR Package Package Pins Type Drawing SSOP DB 28 SPQ Reel Reel Diameter Width (mm) W1 (mm) 2000 330.0 16.4 Pack Materials-Page 1 A0 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 8.2 10.5 2.5 12.0 16.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 11-Mar-2008 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN75LBC187DBR SSOP DB 28 2000 346.0 346.0 33.
PAGE 11
MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
PAGE 12
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