Features: Bidirectional Transceiver
Meet or Exceed the Requirements of ANSIStandard RS-485 andISO 8482:1987(E)
High-Speed Low-Power LinBiCMOSETMCircuitry
Designed for High-Speed Operation in BothSerial and Parallel Applications
Low Skew
Designed for Multipoint Transmission onLong Bus Lines in Noisy Environments|
Very Low Disabled Supply-CurrentRequirements . . . 200 uA Maximum
Wide Positive and Negative Input/OutputBus Voltage Ranges
Driver Output Capacity . . . ±60 mA
Thermal-Shutdown Protection
Driver Positive-and Negative-CurrentLimiting
Open-Circuit Fail-Safe Receiver Design
Receiver Input Sensitivity . . . ±200 mV Max
Receiver Input Hysteresis . . . 50 mV Typ
Operate From a Single 5-V Supply
Glitch-Free Power-Up and Power-DownFunction Tables
Available in Q-Temp AutomotiveHighRel Automotive ApplicationsConfiguration Control / Print SupportQualification to Automotive Standards
Pinout
SpecificationsSupply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .7 V
Voltage range at any bus terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V to 15 V
Input voltage, VI (D, DE, R, or RE) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to VCC + 0.5 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table.
Operating free-air temperature range, TA:SN55LBC176 . . . . . . . . . . . . . .55 to 125
SN65LBC176 . . . . . . . . . . . . . . .40 to 85
SN65LBC176Q . . . . . . . . . . . . . .40to 125
SN75LBC176 . . . . . . . . .. . . . . . . . . .0 to 70
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . .260DescriptionThe SN55LBC176, SN65LBC176,SN65LBC176Q, and SN75LBC176 differentialbus transceivers are monolithic,integrated
circuits designed for bidirectional data communicationon multipoint bus-transmission lines. SN55LBC176, SN65LBC176,SN65LBC176Q, and SN75LBC176 are designed for balanced transmission lines andmeet ANSI Standard RS-485 and ISO8482:1987(E).
The SN55LBC176, SN65LBC176, SN65LBC176Q, and SN75LBC176 combine a 3-state, differential line driverand a differential input line receiver, both of which operate from a single 5-V power supply. The driver andreceiver have active-high and active-low enables, respectively, SN55LBC176, SN65LBC176,SN65LBC176Q, and SN75LBC176 can externally connect together tofunction as a direction control. The driver differential outputs and the receiver differential inputs connectinternally to form a differential input/output (I/O) bus port that is designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. This port features wide positive and negative common-mode voltageranges, making the device suitable for party-line applications. Very low device supply current can be achievedby disabling the driver and the receiver. Both the driver and receiver of SN55LBC176, SN65LBC176,SN65LBC176Q, and SN75LBC176 are available as cells in the TexasInstruments LinASICETM Library.
SN55LBC176, SN65LBC176,SN65LBC176Q, and SN75LBC176 are suitable for ANSI Standard RS-485 and ISO 8482:1987 (E) applications to the extentthat they are specified in the operating conditions and characteristics section of this data sheet. Certain limitscontained in the ANSI Standard RS-485 and ISO 8482:1987 (E) are not met or cannot be tested over the entiremilitary temperature range.
The SN55LBC176 is characterized for operation from 55 to 125. The SN65LBC176 is characterized foroperation from 40to 85, and the SN65LBC176Q is characterized for operation from 40 to 125.The SN75LBC176 is characterized for operation from 0 to 70.
SN55LBC176 Data Sheet
