SN75LBC176A

High-Speed Low-Power LinBiCMOS^TMCircuitry Designed for Signaling Rates† Upto 30 Mbps
Bus-Pin ESD Protection Exceeds 12 kVHBM
Compatible With ANSI StandardTIA/EIA-485-A and ISO 8482:1987(E)
Low Skew
Designed for Multipoint Transmission onLong Bus Lines in Noisy Environments
Very Low Disabled Supply-CurrentRequirements . . . 700 µA Maximum
Common Mode Voltage Range of −7 Vto 12 V
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
Glitch-Free Power-Up and Power-DownProtection
Available in Q-Temp AutomotiveHigh Reliability Automotive ApplicationsConfiguration Control / Print SupportQualification to Automotive Standards

The SN65LBC176A, SN65LBC176AQ, andSN75LBC176A differential bus transceivers aremonolithic, integrated circuits designed forbidirectional data communication on multipointbus-transmission lines. They are designed forbalanced transmission lines and are compatiblewith ANSI standard TIA/EIA-485-A and ISO 8482.The A version offers improved switching performanceover its predecessors without sacrificingsignificantly more power.

The SN65LBC176A, SN65LBC176AQ, and SN75LBC176A combine a 3-state, differential line driver and adifferential input line receiver, both of which operate from a single 5-V power supply. The driver and receiverhave active-high and active-low enables, respectively, which can externally connect together to function as adirection control. The driver differential outputs and the receiver differential inputs connect internally to form adifferential input/output (I/O) bus port that is designed to offer minimum loading to the bus whenever the driveris disabled or VCC = 0. This port features wide positive and negative common-mode voltage ranges, making the device SN75LBC176A suitable for party-line applications. Very low device supply current can be achieved by disabling thedriver and the receiver.