SN65LBC182

ACTIVE

Half-duplex,15-kV ESD, 1/4 UL Transceiver

Product details

Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 5 Signaling rate (max) (MBits) 0.25 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -10 to 15 Common-mode range (V) -7 to 12 Number of nodes 128 Features IEC ESD protection Isolated No Supply current (max) (µA) 30000 Rating Catalog Operating temperature range (°C) -40 to 85
Number of receivers 1 Number of transmitters 1 Duplex Half Supply voltage (nom) (V) 5 Signaling rate (max) (MBits) 0.25 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -10 to 15 Common-mode range (V) -7 to 12 Number of nodes 128 Features IEC ESD protection Isolated No Supply current (max) (µA) 30000 Rating Catalog Operating temperature range (°C) -40 to 85
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6
  • One-fourth unit load allows up to 128 devices on a bus
  • Meets or exceeds the requirements of ANSI standard TIA/EIA-485-A and ISO 8482: 1987(E)
  • Controlled driver output-voltage slew rates allow longer cable stub lengths
  • Designed for signaling rates.
    • The signaling rate of a line, is the number of voltage transitions that are made per second expressed in the units bps (bits per second) up to 250 kbps
  • Low disabled supply current: 250-µA maximum
  • Thermal shutdown protection
  • Open-circuit fail-safe receiver design
  • Receiver input hysteresis: 70-mV typical
  • Glitch-free power-up and power-down protection
  • One-fourth unit load allows up to 128 devices on a bus
  • Meets or exceeds the requirements of ANSI standard TIA/EIA-485-A and ISO 8482: 1987(E)
  • Controlled driver output-voltage slew rates allow longer cable stub lengths
  • Designed for signaling rates.
    • The signaling rate of a line, is the number of voltage transitions that are made per second expressed in the units bps (bits per second) up to 250 kbps
  • Low disabled supply current: 250-µA maximum
  • Thermal shutdown protection
  • Open-circuit fail-safe receiver design
  • Receiver input hysteresis: 70-mV typical
  • Glitch-free power-up and power-down protection

The SN65LBC182 and SN75LBC182 are differential data line transceivers with a high level of ESD protection in the trade-standard footprint of the SN75176. They are designed for balanced transmission lines and meet ANSI standard TIA/EIA-485-A and ISO 8482. The SN65LBC182 and SN75LBC182 combine a 3-state, differential line driver and differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, which can be externally connected together to function as a direction control.

The driver outputs and the receiver inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus. This port operates over a wide range of common-mode voltage, making the device suitable for party-line applications. The device also includes additional features for party-line data buses in electrically noisy environment applications such as industrial process control or power inverters.

The SN75LBC182 and SN65LBC182 bus pins also exhibit a high input resistance equivalent to one-fourth unit load allowing connection of up to 128 similar devices on the bus. The high ESD tolerance protects the device for cabled connections. (For an even higher level of protection, see the SN65/75LBC184, literature number SLLS236.)

The differential driver design incorporates slew-rate-controlled outputs sufficient to transmit data up to 250 kbps. Slew-rate control allows longer unterminated cable runs and longer stub lengths from the main backbone than possible with uncontrolled voltage transitions. The receiver design provides a fail-safe output of a high level when the inputs are left floating (open circuit). Very low device supply current can be achieved by disabling the driver and the receiver.

The SN65LBC182 is characterized for operation from −40°C to 85°C, and the SN75LBC182 is characterized for operation from 0°C to 70°C.

The SN65LBC182 and SN75LBC182 are differential data line transceivers with a high level of ESD protection in the trade-standard footprint of the SN75176. They are designed for balanced transmission lines and meet ANSI standard TIA/EIA-485-A and ISO 8482. The SN65LBC182 and SN75LBC182 combine a 3-state, differential line driver and differential input line receiver, both of which operate from a single 5-V power supply. The driver and receiver have active-high and active-low enables, respectively, which can be externally connected together to function as a direction control.

The driver outputs and the receiver inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus. This port operates over a wide range of common-mode voltage, making the device suitable for party-line applications. The device also includes additional features for party-line data buses in electrically noisy environment applications such as industrial process control or power inverters.

The SN75LBC182 and SN65LBC182 bus pins also exhibit a high input resistance equivalent to one-fourth unit load allowing connection of up to 128 similar devices on the bus. The high ESD tolerance protects the device for cabled connections. (For an even higher level of protection, see the SN65/75LBC184, literature number SLLS236.)

The differential driver design incorporates slew-rate-controlled outputs sufficient to transmit data up to 250 kbps. Slew-rate control allows longer unterminated cable runs and longer stub lengths from the main backbone than possible with uncontrolled voltage transitions. The receiver design provides a fail-safe output of a high level when the inputs are left floating (open circuit). Very low device supply current can be achieved by disabling the driver and the receiver.

The SN65LBC182 is characterized for operation from −40°C to 85°C, and the SN75LBC182 is characterized for operation from 0°C to 70°C.

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Technical documentation

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Type Title Date
* Data sheet SNx5LBC182 Differential Bus Transceiver datasheet (Rev. B) PDF | HTML 19 Oct 2023
EVM User's guide RS-485 Half-Duplex EVM User's Guide (Rev. C) PDF | HTML 01 Sep 2021
Application note RS-485 for E-Meter Applications (Rev. A) 06 Aug 2004
Application note The RS-485 Unit Load and Maximum Number of Bus Connections 15 Mar 2004

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Evaluation board

RS485-HF-DPLX-EVM — RS-485 half-duplex evaluation module

The RS-485 half-duplex evaluation module (EVM) helps designers evaluate device performance, supporting fast development and analysis of data-transmission systems using any of the SN65HVD1x, SN65HVD2x, SN65HVD7x, SN65HVD8x and SN65HVD96 half-duplex transceivers. The EVM board comes without the (...)
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SN65LBC182 IBIS Model

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