Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 75 | TUBE |
Features for the SN65HVD21
- Common-mode voltage range (–20 V to 25 V) more than doubles TIA/EIA-485 requirement
- Receiver equalization extends cable length, signaling rate (SN65HVD2[3,4])
- Reduced unit-load for up to 256 nodes
- Bus I/O protection to over 16-kV HBM
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions
- Low standby supply current 1 µA (maximum)
- More than 100 mV receiver hysteresis
Description for the SN65HVD21
The transceivers in the SN65HVD2x family offer performance far exceeding typical RS-485 devices. In addition to meeting all requirements of the TIA/EIA ‑485-A standard. The SN65HVD2x family operates over an extended range of common-mode voltages and has features such as high ESD protection, wide receiver hysteresis, and failsafe operation. This family of devices is designed for long-cable networks, and other applications where the environment is too harsh for ordinary transceivers.
These devices are designed for bidirectional data transmission on multipoint twisted-pair cables. Example applications are digital motor controllers, remote sensors and terminals, industrial process control, security stations, and environmental control systems.
These devices combine a 3-state differential driver and a differential receiver that operate from a single 5-V power supply. The driver differential outputs and the receiver differential inputs are connected internally to form a differential bus port that offers minimum loading to the bus. This port features an extended common-mode voltage range, making the device suitable for multipoint applications over long cable runs.