EXAR, the market leader, offers the industry's broadest line-up of
UART and serial protocol transceivers solutions.
With over 200 devices, wide 2.25 to 5.5V power supply range, 1 to 128 bytes of FIFO and compliance with the universal 3.3/5V PCI, Intel and Motorola bus interfaces, including single protocol ICs that support RS-232, RS-422 or RS-485 as well as dual and multi-protocol ICs that support from 2 to 8 of the most popular interface standards with a single IC, Exar has already done the difficult work for you.
We can deliver an immediate competitive advantage to your compressed time-to-market demands accelerating initial design, to functioning prototype and finally volume production.
SP1486E is a half duplex differential line transceiver suitable for high speed bidirectional communication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver.
Devices comply with TIA/EIA-485 and TIA/EIA-422 standards and also meet the higher drive and tighter skew requirements of PROFIBUS applications. Lead-free and RoHS compliant packages are available for all models.
PROFIBUS is in wide use in industrial control and automation applications and the SP1486E is ruggedized for use in harsh operating conditions. Receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted.
All RS485 bus-pins are protected against severe ESD events up to ±15kV (Air-Gap and Human Body Model) and up to ±8kV Contact Discharge (IEC 1000-4-2). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown.
Devices are rated for Industrial (-40 to +85ºC) or Extended (-40 to +125ºC) operating temperatures. Receivers have exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin.
All devices operate from a single 5.0 V power supply and draw negligible quiescent power. Both driver and receiver can be enabled and disabled independently and the device enters a low power shutdown mode if both driver and receiver are disabled. The bus-pin outputs of disabled modules are in high impedance state. The high impedance driver output is maintained over the entire common-mode voltage range from -7 to +12V.
Features
- Optimized for PROFIBUS Network Applications
- Differential Output Voltage Exceed 2.1V ( 54Ω load)
- High Speed Data Rate - 20 Mbps
- Receiver failsafe on open, short or terminated lines
- 1/8th Unit Load, 256 transceivers on bus
- Hot Swap glitch protection on control inputs
- Driver short circuit current limit and thermal shutdown for overload protection
- 5.0V Single Supply Operation
- Ultra-low 400μA Quiescent Current
- 1μA shutdown mode
- Industry standard package footprints
- Robust ESD Specifications:
- ±15KV IEC1000-4-2 Air Gap and HBM
- ±8KV IEC1000-4-2 Contact Discharge