Overview
The SN65HVD379DR is a 3.3-V full-duplex RS-485/RS-422 driver and receiver integrated circuit designed by Texas Instruments. This device is optimized for use in INTERBUS applications and is compliant with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standards. It operates with a 3.3-V power supply and supports bi-directional data communication on multipoint bus-transmission lines at signaling rates up to 25 Mbps.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 3 | 3.3 | 3.6 | V |
| Signaling Rate | - | - | 25 | Mbps |
| Differential Load Resistance | 54 | - | 60 | Ω |
| High-Level Input Voltage | - | - | 2 VCC | V |
| Low-Level Input Voltage | 0 | - | 0.8 VCC | V |
| Differential Input Voltage | -12 | - | 12 | V |
| High-Level Output Current (Driver) | -60 | - | - | mA |
| Low-Level Output Current (Driver) | 60 | - | - | mA |
| Ambient Still-Air Temperature | -40 | - | 85 | °C |
Key Features
- Full-duplex operation with separate input and output pins for each driver and receiver.
- 3.3-V power supply operation.
- Compliant with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standards.
- 1/2 unit-load receiver, supporting up to 64 nodes on the bus.
- Bus-pin ESD protection up to 15 kV HBM.
- Bus-fault protection from –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.
Q & A
- What is the operating voltage range of the SN65HVD379DR?
The SN65HVD379DR operates with a supply voltage range of 3 to 3.6 V.
- What is the maximum signaling rate supported by the SN65HVD379DR?
The device supports signaling rates up to 25 Mbps.
- What is the differential load resistance for the SN65HVD379DR?
The differential load resistance is between 54 Ω and 60 Ω.
- Does the SN65HVD379DR have ESD protection?
- What are the key standards that the SN65HVD379DR is compliant with?
The device is compliant with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standards.
- How many nodes can be supported on the bus with the SN65HVD379DR?
The 1/2 unit-load receiver supports up to 64 nodes on the bus.
- What is the ambient temperature range for the SN65HVD379DR?
The device operates over an ambient still-air temperature range of –40°C to 85°C.
- Does the SN65HVD379DR have thermal shutdown protection?
- Are the inputs of the SN65HVD379DR 5-V tolerant?
- What are some typical applications of the SN65HVD379DR?
Typical applications include digital motor control, utility meters, chassis-to-chassis interconnections, electronic security stations, and industrial automation.
