ESP485

Elecsuper's ESP485 is a slew-rate-limited differential transceiver powered by 3V to 5.5V supply voltage, featuring ±15kV ESD protection and full RS485 compatibility. Each device contains one driver and one receiver, designed for data transmission with an extended common-mode range of -7V to +12V. The maximum data transmission rate is up to 15Mbps. The ESP485 series offers enhanced ESD protection, with ±15kV human body model protection on all driver outputs and receiver inputs. The driver incorporates short-circuit current limiting. When the driver output enters a high-impedance state due to thermal shutdown circuitry, the driver prevents excessive power dissipation. The receiver inputs feature a "fail-safe" design, ensuring a logic-high output when the receiver inputs are floating, shorted, or terminated but undriven. Both devices support power-on/power-off modes, with glitch-free driver outputs allowing hot-plugging of transceivers on the data bus. The CMOS design significantly reduces power consumption while maintaining robustness against overload or ESD damage. Typical quiescent current is only 300uA during operation and 1uA in shutdown mode. The ESP485 is designed for half-duplex communication and is available in an SOP8 package.

Applications

• Telecommunications
• Low-power RS-485 transceivers
• Integrated Services Digital Network
• Industrial control LAN
• Transceivers for EMI-sensitive applications
• Packet switching
• Level translators

Key features

• ESD protection for RS-485 I/O pins
• High data rate: 15Mbps at 5V supply, 15Mbps at 3.3V supply
• ±15kV HBM ESD protection
• 3V to 5.5V supply voltage range
• 1uA low-current shutdown mode
• -7V to +12V common-mode input voltage range
• Up to 256 transceivers on bus
• Thermal shutdown
• Current limiting for driver overload protection
• Fully fail-safe (open, short, terminated) receiver