SN75LPE185 Datasheet, PDF (1/13 Pages) Texas Instruments – LOW-POWER MULTIPLE RS-232 DRIVERS/RECEIVERS WITH ENABLE

SN75LPE185
LOW-POWER MULTIPLE RS-232 DRIVERS/RECEIVERS
WITH ENABLE
SLLS256D – DECEMBER 1996 – REVISED OCTOBER 1998
D Single-Chip RS-232 Interface for IBM™ PC™
Compatible Serial Port
D Designed to Transmit and Receive 4-µs Pulses
(Equivalent to 256 kbit/s)
D Standby Power Is Less Than 750 µW Maximum
D Wide Supply-Voltage Range . . . 4.75 V to 15 V
D Driver Output Slew Rates Are Internally
Controlled to 30-V/µs Maximum
D RS-232 Bus-Pin ESD Protection Exceeds:
– 15 kV, Human-Body Model
– 8-kV IEC1000-4-2, Contact
– 15-kV IEC1000-4-2, Air Gap
D Receiver Input Hysteresis . . . 1000 mV Typical
D Three Drivers and Five Receivers Meet or
Exceed the Requirements of TIA/EIA-232-F and
ITU v.28 Standards
D Complements the SN75LP196
D One Receiver Remains Active During WAKE-UP
Mode (100 µA Maximum)
D Matches the Flow-Through Pinout of the
Industry-Standard SN75185, SN75C185, and
SN75LP185, With Additional Control Pins
D Package Options Include Plastic Shrink
Small-Outline (DB), Small-Outline (DW), Thin
Shrink Small-Outline (PW), and Standard
Plastic (NT) DIPs
DB, DW, NT, OR PW PACKAGE
(TOP VIEW)
V_{DD 1}
RA1 ₂
RA2 ₃
RA3 4
DY1 5
DY2 6
RA4 7
DY3 8
RA5 9
V_SS 10
EN 11
MODE 12
24 ^V_CC
23 ^RY1
22 ^RY2
21 RY3
20 DA1
19 DA2
18 RY4
17 DA3
16 RY5
15 GND
14 NC
13 NC
NC – No internal connection
description
The SN75LPE185 is a low-power bipolar device containing three drivers and five receivers, with 15-kV ESD
protection on the bus pins, with respect to each other. Bus pins are defined as those pins that tie directly to the
serial-port connector, including GND. The pinout matches the flow-through design of the industry-standard
SN75185, SN75C185, and SN75LP185, with the addition of four pins for control signals. The flow-through
pinout of the device allows easy interconnection of the UART and serial-port connector of the IBM PC
compatibles. The SN75LPE185 provides a rugged, low-cost solution for this function with the combination of
bipolar processing and 15-kV ESD protection.
The SN75LPE185 has an internal slew-rate control to provide a maximum rate of change in the output signal
of 30 V/µs. The driver output swing is clamped at ±6 V to enable the higher data rates associated with this device
and reduce EMI emissions. Although the driver outputs are clamped, the outputs can handle voltages up to
±15 V without damage.
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-low enable (EN) input. The mode control
(MODE) input selects between the STANDBY and WAKE-UP modes. With a low-level input on the MODE pin
and a high-level input on the EN pin, one receiver remains active while the remaining drivers and receivers are
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.
IBM and PC are trademarks of International Business Machines Corporation.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1998, Texas Instruments Incorporated
1