Low-Power Multiple RS-232 Drivers and Receivers

Product details

Drivers per package 3 Receivers per package 5 Logic voltage (min) (V) 5 Data rate (max) (Mbps) 0.256 Main supply voltage (nom) (V) 5 ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) 0 to 70 Vout (typ) (V) 5.8
Drivers per package 3 Receivers per package 5 Logic voltage (min) (V) 5 Data rate (max) (Mbps) 0.256 Main supply voltage (nom) (V) 5 ESD HBM (kV) 15 Rating Catalog Operating temperature range (°C) 0 to 70 Vout (typ) (V) 5.8
SOIC (DW) 20 131.84 mm² 12.8 x 10.3 SSOP (DB) 20 56.16 mm² 7.2 x 7.8
  • Single-Chip TIA/EIA-232-F Interface for IBMTM PC/ATTM Serial Port
  • Designed to Transmit and Receive 4-us Pulses (Equivalent to 256 kbit/s)
  • Less Than 21-mW Power Consumption
  • Wide Supply-Voltage Range...4.75 V to 15V
  • Driver Output Slew Rates Are Internally Controlled to 30 V/us Max
  • Receiver Input Hysteresis...1000 mV Typical
  • TIA/EIA-232-F Bus-Pin ESD Protection Exceeds:
    • 15-kV, Human-Body Model
  • Three Drivers and Five Receivers Meet or Exceed the Requirements of TIA/EIA-232-F and ITU V.28
  • Complements the SN75LP196
  • Designed to Replace the Industry-Standard SN75185 and SN75C185 With the Same Flow-Through Pinout
  • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Dual-In-Line (N) Packages

IBM and PC/AT are trademarks of International Business Machines Corporation.

  • Single-Chip TIA/EIA-232-F Interface for IBMTM PC/ATTM Serial Port
  • Designed to Transmit and Receive 4-us Pulses (Equivalent to 256 kbit/s)
  • Less Than 21-mW Power Consumption
  • Wide Supply-Voltage Range...4.75 V to 15V
  • Driver Output Slew Rates Are Internally Controlled to 30 V/us Max
  • Receiver Input Hysteresis...1000 mV Typical
  • TIA/EIA-232-F Bus-Pin ESD Protection Exceeds:
    • 15-kV, Human-Body Model
  • Three Drivers and Five Receivers Meet or Exceed the Requirements of TIA/EIA-232-F and ITU V.28
  • Complements the SN75LP196
  • Designed to Replace the Industry-Standard SN75185 and SN75C185 With the Same Flow-Through Pinout
  • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Dual-In-Line (N) Packages

IBM and PC/AT are trademarks of International Business Machines Corporation.

The SN75LP1185 is a low-power bipolar device containing three drivers and five receivers, with 15 kV of 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 and SN75C185. The flow-through pinout of the SN75LP1185 allows easy interconnection of the UART and serial-port connector of the IBM PC/AT and compatibles. The SN75LP1185 provides a rugged, low-cost solution for this function with the combination of the bipolar processing and 15 kV of ESD protection.

The SN75LP1185 has internal slew-rate control to provide a maximum rate of change in the output signal of 30 V/us. The driver output swing is nominally clamped at ±6 V to enable the higher data rates associated with this device and to reduce EMI emissions. Even though the driver outputs are clamped, they can handle voltages up to ±15 V without damage. All the logic inputs can accept 3.3-V or 5-V input signals.

The SN75LP1185 complies with the requirements of TIA/EIA-232-F and ITU V.28. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20 kbit/s. The switching speeds of the SN75LP1185 support rates up to 256 kbit/s.

The SN75LP1185 is characterized for operation from 0°C to 70°C.

The SN75LP1185 is a low-power bipolar device containing three drivers and five receivers, with 15 kV of 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 and SN75C185. The flow-through pinout of the SN75LP1185 allows easy interconnection of the UART and serial-port connector of the IBM PC/AT and compatibles. The SN75LP1185 provides a rugged, low-cost solution for this function with the combination of the bipolar processing and 15 kV of ESD protection.

The SN75LP1185 has internal slew-rate control to provide a maximum rate of change in the output signal of 30 V/us. The driver output swing is nominally clamped at ±6 V to enable the higher data rates associated with this device and to reduce EMI emissions. Even though the driver outputs are clamped, they can handle voltages up to ±15 V without damage. All the logic inputs can accept 3.3-V or 5-V input signals.

The SN75LP1185 complies with the requirements of TIA/EIA-232-F and ITU V.28. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20 kbit/s. The switching speeds of the SN75LP1185 support rates up to 256 kbit/s.

The SN75LP1185 is characterized for operation from 0°C to 70°C.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet Low-Power Multiple RS-232 Drivers And Receivers datasheet (Rev. A) 09 Jan 2001
Application note Interface Circuits for TIA/EIA-232-F (Rev. A) 19 Sep 2002

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Package Pins Download
SOIC (DW) 20 View options
SSOP (DB) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos