SN75LBC176DR Electronic IC Chips DIFFERENTIAL BUS TRANSCEIVERS

SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176

DIFFERENTIAL BUS TRANSCEIVERS

• Bidirectional Transceiver

• Meets or Exceeds the Requirements of ANSI Standard TIA/EIA−485−A and ISO 8482:1987(E)

• High-Speed Low-Power LinBiCMOS™ Circuitry

• Designed for High-Speed Operation in Both Serial and Parallel Applications

• Low Skew

• Designed for Multipoint Transmission on Long Bus Lines in Noisy Environments

• Very Low Disabled Supply Current . . . 200 µA Maximum

• Wide Positive and Negative Input/Output Bus Voltage Ranges

• Thermal-Shutdown Protection

• Driver Positive-and Negative-Current Limiting

• Open-Circuit Failsafe Receiver Design

• Receiver Input Sensitivity... ±200 mV Max

• Receiver Input Hysteresis . . . 50 mV Typ

• Operates From a Single 5-V Supply

• Glitch-Free Power-Up and Power-Down Protection

• Available in Q-Temp Automotive

  HighRel Automotive Applications

  Configuration Control / Print Support

  Qualification to Automotive Standards

description

The SN55LBC176, SN65LBC176, SN65LBC176Q, and SN75LBC176 differential bus transceivers are monolithic, integrated circuits designed for bidirectional data communication on multipoint bus-transmission lines. They are designed for balanced transmission lines and meet ANSI Standard TIA/EIA−485−A (RS-485) and ISO 8482:1987(E).

The SN55LBC176, SN65LBC176, SN65LBC176Q, and SN75LBC176 combine a 3-state, differential line driver and a 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 externally connect together to function as a direction control.

The driver differential outputs and the receiver differential inputs connect internally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the bus whenever the driver is disabled or V_CC = 0. This port features wide positive and negative common-mode voltage ranges, making the device suitable for party-line applications. Very low device supply current can be achieved by disabling the driver and the receiver.

These transceivers are suitable for ANSI Standard TIA/EIA−485 (RS-485) and ISO 8482 applications to the extent that they are specified in the operating conditions and characteristics section of this data sheet. Certain limits contained in TIA/EIA−485−A and ISO 8482:1987 (E) are not met or cannot be tested over the entire military temperature range.

The SN55LBC176 is characterized for operation from −55°C to 125°C. The SN65LBC176 is characterized for operation from −40°C to 85°C, and the SN65LBC176Q is characterized for operation from −40°C to 125°C. The SN75LBC176 is characterized for operation from 0°C to 70°C.

schematics of inputs and outputs

absolute maximum ratings†

Supply voltage, V_CC (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 V

Voltage range at any bus terminal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  −10 V to 15 V

Input voltage, V_I (D, DE, R, or RE)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V_CC + 0.5 V

Receiver output current, I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±10 mA

Continuous total power dissipation  . . . . . . . . . . . . . . . . . . . . . . . . .  See Dissipation Rating Table

Storage temperature range, Tstg  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values, except differential I/O bus voltage, are with respect to network ground terminal.

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