Overview
The SN65HVD37DR, produced by Texas Instruments, is a low-power, 3.3V-supply full-duplex RS-485 driver/receiver designed for demanding industrial applications. This device combines a robust differential driver and a receiver with high noise immunity, making it suitable for multi-point applications over long cable runs. It operates over a temperature range of -40°C to 85°C and is fully compliant with TIA-485-A specifications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | -0.5 | 7 | V | |
| Input Voltage Range at Logic Pins | -0.3 | 5.7 | V | |
| Driver Differential Output Voltage (|VOD|) | 1.5 | 2 | V | |
| Receiver Hysteresis (VHYS) | 30 | 60 | mV | |
| Signaling Rate | 20 | Mbps | ||
| Operating Temperature Range | -40 | 85 | °C | |
| Junction Temperature (TJ) | -40 | 150 | °C | |
| ESD Protection (HBM) | ±16 kV |
Key Features
- Low-current standby mode: <1 μA typical
- Operational quiescent current: < 1 mA
- High receiver hysteresis for noise immunity: 60 mV typical
- 1/8 unit-load, supporting up to 256 nodes on the bus
- Bus-pin ESD protection exceeds 15 kV HBM
- Driver output transition times optimized for signaling rates up to 20 Mbps
- Glitch-free power-up and power-down protection for hot-plugging applications
- 5V-tolerant logic inputs
- Bus idle, open, and short-circuit failsafe
- Driver current limiting and thermal shutdown
Applications
- Telecommunications equipment
- Industrial automation
- Process automation
- Building automation
- Point-of-Sale (POS) terminals
Q & A
- What is the maximum signaling rate of the SN65HVD37DR?
The maximum signaling rate is up to 20 Mbps. - What is the operating temperature range of the SN65HVD37DR?
The operating temperature range is -40°C to 85°C. - Is the SN65HVD37DR compliant with TIA-485-A specifications?
Yes, it is fully compliant with TIA-485-A specifications. - What is the typical receiver hysteresis of the SN65HVD37DR?
The typical receiver hysteresis is 60 mV. - Does the SN65HVD37DR support hot-plugging applications?
Yes, it is designed for hot-plugging applications with glitch-free power-up and power-down protection. - What is the maximum number of nodes supported on the bus?
It supports up to 256 nodes on the bus. - What is the ESD protection level of the SN65HVD37DR?
The ESD protection exceeds 15 kV HBM. - Are the logic inputs 5V-tolerant?
Yes, the logic inputs are 5V-tolerant. - Does the SN65HVD37DR have failsafe protection for bus states?
Yes, it has failsafe protection for open, short-circuit, and idle bus states. - What is the typical quiescent current of the SN65HVD37DR?
The typical quiescent current is less than 1 mA.
