(ACTIVE) 3.3 V RS-485 with 1.65 V I/O Supply and Selectable Data Rate


Functional Diagram


The SN65HVD01 is a low-power, 250 kbps or 20 Mbps data rate selectable RS-485 transceiver, utilizing a 1.65-V to 3.6-V supply for data and enable signals, and a 3.3 V ± 10% supply for bus signals. The device is designed for applications requiring synchronous (parallel transceiver) signal timing. On-chip transient suppression protects the device against destructive IEC 61000 ESD and EFT transients.

The device combines a differential driver and a differential receiver, connected internally to form a bus port suitable for half-duplex (two-wire bus) communication. The device features a wide common-mode voltage range making it suitable for multi-point applications over long cable runs. The SN65HVD01 is available in a tiny, 3 mm × 3 mm, SON package with operation characterized from –40°C to 125°C.


  • Exceeds Requirements of TIA-485 Standard
  • 1.65-V to 3.6-V Supply for Data and Enable Signals
  • 3-V to 3.6-V Supply for Bus Signals
  • SLR Pin Selectable Data Rates: 250 kbps or 20 Mbps
  • 1/8th Unit Load to Support up to 256 Nodes on a Bus
  • Small 3 mm × 3 mm SON Package
  • Failsafe Receiver (Bus Open, Bus Shorted, Bus Idle)
  • Operating Temperature Range: –40°C to 125°C
  • Bus-Pin Protection More Than:
    • ± 15kV HBM Protection
    • ± 16kV IEC61000-4-2 Contact Discharge
    • ± 16kV IEC61000-4-2 Air Discharge
    • 4kV IEC61000-4-4 Fast Transient Burst


Supply Voltage(s) (Nom) (V) 3.3    
No. of TX 1    
No. of RX 1    
Duplex Half    
Signaling Rate (Max) (Mbps) 20    
IEC 61000-4-2 Contact (+/- kV) 16    
HBM ESD (kV) 15    
Fault Protection (V) -13 to 16.5    
Number of Nodes 256    
Common Mode Range -7 to 12    
ICC (Max) (mA) 1.1    
Isolated No    
Rating Catalog    
Operating Temperature Range (C) -40 to 125    
Package Group VSON|10    
Approx. Price (US$) 1.60 | 1ku    

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