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The SN65HVD08 combines a 3-state differential line driver and differential line receiver designed for balanced data transmission and interoperation with ANSI TIA/EIA-485-A and ISO-8482E standard-compliant devices.
The wide supply voltage range and low quiescent current requirements allow the SN65HVD08s to operate from a 5-V power bus in the cable with as much as a 2-V line voltage drop. Busing power in the cable can alleviate the need for isolated power to be generated at each connection of a ground-isolated bus.
The driver differential outputs and receiver differential inputs connect internally to form a differential in-put/output (I/O) bus port that is designed to offer minimum loading to the bus whenever the driver is disabled or not powered. The drivers and receivers have active-high and active-low enables respectively, which can be externally connected together to func- tion as a direction control.
SN65HVD08 Maximum Ratings
A, B, and GND
Supply voltage, VCC
-0.3 V to 6 V
Voltage range at A or B
-9 V to 14 V
Input voltage range at D, DE, R or RE
-0.5 V to VCC + 0.5 V
Voltage input range, transient pulse, A and B, through 100 W
-25 V to 25 V
Electrostatic discharge
Human Body Model(3)
A, B, and GND
±16 kV
All pins
±4 kV
Charged-Device Model(4)
All pins
1 kV
Continuous power dissipation
See Dissipation Rating Table
Storage temperature range
−65°C to 150°C
SN65HVD08 Features
· Operates With a 3-V to 5.5-V Supply · Consumes Less Than 90 mW Quiescent Power · Open-Circuit, Short Circuit, and Idle-Bus Failsafe Receiver · 1/8th Unit-Load (up to 256 nodes on the bus) · Bus-Pin ESD Protection Exceeds 16 kV HBM · Driver Output Voltage Slew-Rate Limited for Optimum Signal Quality at 10 Mbps · Electrically Compatible With ANSI TIA/EIA-485 Standard
SN65HVD08 Typical Application
· Data Transmission With Remote Stations Powered From the Host · Isolated Multipoint Data Buses · Industrial Process Control Networks · Point-of-Sale Networks · Electric Utility Metering