News & Events
Intersil Launches New Portfolio of Full Featured RS-485/RS-422 Transceivers
-- New transceivers boost performance in a wide range of industrial and commercial applications~-- Visit Intersil in Booth #215 Hall A4 at electonica 2004, November 9-12 in Munich
Milpitas, CA, November 8, 2004 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high performance analog solutions, today announced a new family of BiCMOS 5 V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced (differential) communication that are typically deployed for long distance transmission and/or in noisy environments. The ISL83080E thru ISL83088E family of transceivers boast several feature enhancements over the current portfolio including a full fail-safe design, hot swap capability, a fractional unit load to the RS-485 bus, three data rate options and greater than 15 kV Human Body Model (HBM) ESD protection.
The transceivers receiver (Rx) inputs feature a true fail-safe design, which ensures a logic high Rx output if Rx inputs are floating, shorted or terminated but un-driven. This prevents Rx chattering for predictable performance during bus faults. Hot Plug circuitry is included on the slew rate limited devices to ensure that the transmitter (Tx) and Rx outputs remain tri-stated during power up/power down. This ensures data isnt disrupted when a node is plugged onto an active bus. Three data rate options provide two slew rate-limited options for low data rates (115 kbps and 500 kbps) and a high-speed option for up to 10 Mbps data rates.
These devices are one-eighth fractional-unit load transceivers that enable up to 256 nodes on the RS-485 bus as compared to only 32 nodes for single-unit load devices. The large number of nodes on a single bus saves cost and complexity, by eliminating the need for repeaters, in large networks, such as, e-power meters, factory automation, process control, environmental control or security systems.
Power-up circuitry ensures that the Tx and Rx outputs remain in a high impedance state until the power supply has stabilized. Tx outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive, and the Tx outputs automatically re-enable once the IC cools down.
These ICs are ESD protected to 15 kV on all Tx and Rx bus pins and up to 7 kV on all logic pins, which greatly improves survivability from random static charges during manufacturing and use. Unlike some competitive devices, Intersils new RS-485 and RS-422 transceivers are specified for 10 percent tolerance supplies (4.5 V to 5.5 V).
ISL8308x Features
- RS-485 I/O pin ESD protection +/-15 kV HBM
- Class 3 ESD protection (HBM) on all pins - greater than 7 kV
- True fail-safe (open, short, terminated/floating) receivers
- Hot Plug circuitry (ISL83080E/82E/83E/85E)
- Transmit and receive outputs remain tri-stated during power-up/power-down
- 1/8 unit load allows up to 256 devices on the bus
- Specified for single 5 V, +/-10% tolerance, supplies
- High data rates up to 10Mbps
- Low quiescent supply current 560 uA
- Ultra low shutdown supply current 70 nA
- -7 V to +12 V Common mode input voltage range
- Half and full duplex pinouts
- Tri-state receiver and transmitter outputs
- Current limiting and thermal shutdown for driver overload protection
| PART NUMBER | HALF/FULL DUPLEX | DATA RATE (Mbps) | HOT PLUG | # DEVICES ON BUS | Rx/Tx ENABLE? | LOW POWER SHUTDOWN? |
| ISL83080E | Full | 0.115 | Yes | 256 | Yes | Yes |
| ISL83082E | Half | 0.115 | Yes | 256 | Yes | Yes |
| ISL83083E | Full | 0.5 | Yes | 256 | Yes | Yes |
| ISL83085E | Half | 0.5 | Yes | 256 | Yes | Yes |
| ISL83086E | Full | 10 | No | 256 | Yes | Yes |
| ISL83088E | Half | 10 | No | 256 | Yes | Yes |
Applications
- Automated utility meter reading systems
- E-power meters
- Factory automation
- Field bus networks
- Security camera networks
- Building environmental control systems
- Industrial/process control networks
The ISL83080E thru ISL83088E transceivers are available now in 8-lead mini small outline plastic package (MSOP), and 8- and 14-lead small outline plastic packages (SOIC). The suggested resale price in 1K quantities is $1.26 for each device. Devices are also available on tape and reel. Additional information on these and other high-performance interface solutions can be obtained online from Intersils Interface Web site at: http://www.intersil.com/interface/
Learn more about Intersils high performance analog products at electronica 2004, November 9-12 in Munich. Visit Intersil in Booth #215 HallA4. About Intersil
Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company’s products address three of the industry’s fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, switching DC-DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and rad-hard applications. For more information about Intersil or to find out how to become a member of our winning team, visit the company’s web site and career page at www.intersil.com.
This release may include "forward looking statements" that are subject to risks and uncertainties. For information identifying economic, political, climatic, currency, regulatory, technological, competitive and some other important factors that could cause actual results to differ materially from those anticipated in the forward looking statements, see Intersil’s Safe Harbor Forward Looking Statement disclaimer found at http://www.intersil.com/legal.asp, as well as Intersil’s SEC filings as updated from time to time, found at http://www.sec.gov. All other trademarks mentioned are the property of their respective owners.
