Product category:
Communications ICs (Wired)
News Release from: Texas Instruments (April 2001-March 2006) | Subject: SN65HVD33/34/35 and SN65HVD53/54/55
Edited by the Electronicstalk Editorial
Team on 21 November 2005
Transceivers upgrade RS485 performance
Six new full-featured full-duplex RS485 transceivers conserve power, provide optimum AC performance for key operating speeds, and allow up to 256 devices on a single RS485 bus.
Texas Instruments has released six full-featured, full-duplex RS485 transceivers that conserve power, provide optimum AC performance for key operating speeds, and allow up to 256 devices on a single RS485 bus With electrostatic discharge (ESD) protection in excess of 15kV (human body model), these products provide a robust interface for both RS485 and RS422 applications such as industrial and building automation, point-of-sale terminals and networks, data terminal equipment/data communications equipment interfaces and utility meters
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The SN65HVD33/34/35 and SN65HVD53/54/55 are differential line drivers and receivers, with separate input and output pins for full-duplex (four-wire) bus communication designs.
The transceivers are designed for interoperation with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T V.11 and ISO8482:1993 standard-compliant devices.
All the devices provide key features and options to give designers the flexibility to maximise their system performance, such as slew rate-controlled outputs to avoid unwanted reflections, and higher-accuracy data transmission for signalling rates of 1, 5 and 25Mbit/s.
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The families also provide a 1/8-unit load option, which allows for up to 256 nodes on the bus.
Power supply options include 3.3V operation for the HVD3x family and 5V operation for the HVD5x family.
When in the low-current standby mode, the HVD3x supply current typically drops to 22nA, making these devices ideal for power-sensitive applications.
The HVD5x family provides strong bus drivers with differential output voltages well above the RS485/RS422 requirements.
This provides signal margin for applications with interconnection losses or noise immunity concerns.
The HVD3x/5x devices are among TI's diverse offering of integrated circuits for industrial applications, including the TMS320C2000 digital signal controllers and MSP430 ultra-low-power microcontrollers, as well as a range of precision amplifiers, data convertors and power management products.
The SN65HVD3x/5x devices are available now from TI and its authorised distributors.
The devices are packaged in a 14-pin small-outline integrated circuit (SOIC) package and are priced at $1.85 for the HVD3x devices and $1.75 for the HVD5x devices in 1000-unit quantities.
TI will introduce other additions to the HVD3x/5x families in 2006, including products that implement receiver equalisation technology for improved performance in long distance applications.
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