SN75LP1185N by Texas Instruments | Drivers & Transmitters | Avnet AMERICAS
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SN75LP1185N

Texas Instruments

Triple Transmitter Quint Receiver RS-232 20-Pin PDIP Tube

Manufacturer Part #: SN75LP1185N

Avnet Manufacturer Part #: SN75LP1185N


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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.

Key Features

  • 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
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Maximum Dual Supply Voltage
    ±15/5.25 V
    Interface Standards
    EIA/TIA-232|RS-232-F|V.28
    Lead Finish
    Gold
    Mounting
    Through Hole
    Supplier Package
    PDIP
    Data Rate
    256 Kbps
    Driving Mode
    No
    Operating Temperature
    0 to 70 °C
    Number of Transceivers
    1
    Number of Receivers per Line
    1
    Data Transmission Topology
    Point-to-Point
    Minimum Dual Supply Voltage
    ±9/4.75 V
    Typical Dual Supply Voltage
    ±12/5 V
    Number of Receivers
    5
    Transmitter Communication Type
    RS-232
    Function
    Line Transmitter/Receiver
    Power Supply Type
    Triple
    Number of Transmitters
    3
    Max Processing Temp
    260
    Number of Drivers per Line
    1
    Product Dimensions
    24.33 x 6.35 x 4.57 mm
    Pin Count
    20
    Maximum Supply Current
    0.8|1 mA
    Screening Level
    Commercial
    ESD Protection
    Yes
    Transmitter Signal Type
    Single-Ended
    Receiver Communication Type
    RS-232
    Receiver Signal Type
    Single-Ended

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542330000

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