SN65HVD50-SN65HVD55 SN65HVD56-SN65HVD59 are TI's RS-485 drivers and receivers with 1/8 unit load option supporting up to 256 nodes on the bus. This product has 15 kV HBM bus pin ESD protection, optional driver output transition time, low current standby mode (< 1 μA), glitch-free power-up and power-down bus I/Os, bus idle, open, and short circuit failsafe protection, meets or exceeds the requirements of ANSI TIA/EIA-485-A and RS-422 compatible standards.
The SN65HVD5X family are 3‑state differential line drivers and receivers that operate from a 5‑V supply and support full‑duplex RS‑485/RS‑422 communication. They meet ANSI TIA/EIA‑485‑A, TIA/EIA‑422‑B, ITU‑T V.11 and ISO 8482:1993 standards and are suited for utility meters, industrial automation, POS terminals, and chassis‑to‑chassis interconnects.
The devices offer selectable unit‑load options (1/8 or 1/2), low‑current standby mode (<1 µA), glitch‑free power‑up/down, and optional receiver equalization for long‑distance operation. Electrical characteristics such as supply voltage range, output current, and signaling rates are detailed in the data sheet.
| Supply voltage range | 3.0 V – 5.5 V |
|---|---|
| Maximum bus terminal voltage | -9 V – +14 V |
| Standby current | < 1 µA |
| Receiver output current | 11 mA |
| Signaling rate options | 1 Mbps, 5 Mbps, 25 Mbps |
| Unit‑load options | 1/8 or 1/2 |
| Operating temperature range | -40 °C – +85 °C |
| Receiver equalization | Available on SN65HVD56, SN65HVD58, SN65HVD57, SN65HVD59 |
The devices can achieve a very low standby current of less than 1 µA when both driver and receiver are disabled.
The absolute maximum rating for any bus terminal (A, B, Y, Z) is –9 V to +14 V.
The devices are specified for operation from –40 °C to +85 °C.
SN65HVD56, SN65HVD58, SN65HVD57 and SN65HVD59 implement receiver equalization technology.