FEATURES
· Designed for INTERBUS Applications
· Designed for RS-422 and RS-485 Networks
· Balanced Receiver Thresholds
· 1/2 Unit-Load (up to 64 nodes on the bus)
· Bus-Pin ESD Protection 15 kV HBM
· Bus-Fault Protection of –7 V to 12 V
· Thermal Shutdown Protection
· Power-Up/Down Glitch-free Bus Inputs and
Outputs
· High Input Impedance With Low VCC
· Monotonic Outputs During Power Cycling
· 5-V Tolerant Inputs

APPLICATIONS
· Digital Motor Control
· Utility Meters
· Chassis-to-Chassis Interconnections
· Electronic Security Stations
· Industrial, Process, and Building Automation
· Point-of-Sale (POS) Terminals and Networks
· DTE/DCE Interfaces

DESCRIPTION
The SN65HVD379 is a differential line driver and
differential-input line receiver that operates with a
3.3-V power supply. Each driver and receiver has separate input and output pins for full-duplex bus
communication designs. They are designed for
balanced transmission lines and interoperation with
ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standard-compliant devices.
These differential bus drivers and receivers are monolithic, integrated circuits designed for full-duplex
bi-directional data communication on multipoint
bus-transmission lines at signaling rates(1) up to 25
Mbps. The SN65HVD379 is fully enabled with no
external enabling pins.
The 1/2 unit load receiver has a higher receiver input
resistance. This results in lower bus leakage currents
over the common-mode voltage range, and reduces
the total amount of current that an RS-485 driver is forced to source or sink when transmitting.
The balanced differential receiver input threshold makes the SN65HVD379 more compatible with
fieldbus requirements that define an external failsafe
structure.