SN65HVD74DR

These devices expand the RS-485 product portfolio, which includes a family of full-duplex transceivers featuring robust 3.3V drivers and receivers with advanced ESD protection. ESD protection includes >±30kV HBM and >±12kV IEC61000-4-2 contact discharge. The larger receiver hysteresis of the SN65HVD7x devices suppresses conducted differential-mode noise, and their wide operating temperature range maintains reliability in harsh environments. SN65HVD7x devices are available in standard SOIC and small MSOP packages. Each of these devices integrates one differential driver and one differential receiver, both powered by a single 3.3V supply. Each driver and receiver has separate input and output pins for full-duplex bus communication designs. These devices feature a wide common-mode voltage range, making them well suited for multipoint applications over long cables. The SN65HVD71, SN65HVD74, and SN65HVD77 devices are fully enabled with no external enable pins required. The SN65HVD70, SN65HVD73, and SN65HVD76 devices have an active-high driver enable and an active-low receiver enable. Disabling both the driver and receiver yields a low standby current of less than 5μA. These devices are rated for an operating temperature range of -40°C to 125°C.

Applications

• Electronic energy meters
• Industrial automation
• Building automation
• Security and surveillance
• Encoders and decoders

Key features

• 1/8 unit load option, up to 256 nodes per bus
• Bus I/O protection
• ±30kV HBM protection, >±12kV IEC61000-4-2 contact discharge, >±4kV IEC61000-4-4 fast transient burst
• Industrial operating temperature range: -40°C to 125°C
• Large receiver hysteresis (70mV) for noise suppression
• Low power consumption
• Quiescent current <1.1mA during operation, low standby supply current: 10nA (typical), <5μA (maximum)
• Glitch-free power-up and power-down protection for hot-plug applications
• 5V tolerant logic inputs compatible with 3.3V or 5V controllers
• Optimized for data rates: 400kbps (70, 71), 20Mbps (73, 74), 50Mbps (76, 77)