Product category: Standard Logic Devices
News Release from: National Semiconductor | Subject: SCAN921025, SCAN921226 and SCAN921260UJB
Edited by the Electronicstalk Editorial Team on 12 February 2002
LVDS gets faster and faster
National Semiconductor has the industry's fastest 10bit LVDS serialiser/deserialiser chipset for high-speed data transfer over a single differential pair.
National Semiconductor has the industry's fastest 10bit LVDS serialiser/deserialiser chipset for high-speed data transfer over a single differential pair Designed to meet the high speed data transfer rates of third-generation wireless basestation, video, and medical instrumentation markets, National's SCAN921025 and SCAN921226 is a low-power low-noise solution in a form factor that is 30% smaller than competitive products
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
Related stories
Dual-port Gigabit Ethernet transceiver
National Semiconductor has announced the DP83862, a low-cost, highly integrated dual-port 10/100/1000 physical layer transceiver.
World's smallest multifunction supervisory ICs
National Semiconductor has announced a family of supervisory ICs with a variety of factory-programmable features that can be configured in hundreds of possible combinations.
The company also introduced the SCAN921260UJB, a single highly integrated product that incorporates six 1:10 deserialisers with IEEE 1149.1 test capability and built-in-self-test mode that supports data rates up to 66MHz.
By incorporating six deserialisers in a single product, National's SCAN921260UJB offers OEMs a substantial space saving in PCBs and lower overall costs.
The product is ideally suited for wireless basestations and other space-conscious applications.
Further reading
Leadless leadframe package shrinks LDO
National Semiconductor has introduced a full-featured 500mA LDO regulator for medium-current applications in computing devices and portable products.
Boomer shrinks stereo headphone amplification
New from National Semiconductor, the LM4811 Boomer audio amplifier is a 105mW stereo headphone amplifier for use in 3 and 5V systems requiring a headphone output and volume control.
Frugal dual-channel A/D conversion
National Semiconductor has introduced a dual-channel 8bit A/D convertor with record low-power dissipation levels.
Boundary SCAN is an industry standard technology that makes device, board and system-level testing faster, easier, and more economical.
National's new SCAN system test access (STA) products provide the infrastructure for delivering test vectors or reconfiguration/programming files across a standard IEEE 1149.1 test bus in an embedded environment.
STA products also convert the four-wire IEEE 1149.1 bus into a system-level multidrop test bus, providing access to TTL and LVDS interconnects in order to verify structural integrity.
"National's new SCAN LVDS products offer the industry's best combination of high speed, low power consumption, and small size available on the market today", said Alan Hutton, marketing manager of the wired communications division at National Semiconductor in Europe.
"The high frequency operation and innovative at-speed BIST test mode extends our proven leadership in the markets for LVDS and boundary SCAN enabled products".
The SCAN921025 and SCAN921226 chipset was developed to address clock speeds over 66MHz, specifically 78.8MHz for telecomms and 74.25MHz for video applications.
The serialiser input accepts as many as 10 parallel bits with the associated transmit clock to latch the parallel bits into the device.
It serialises them and embeds the clock for serial transport.
The deserialiser accepts the serial stream, recovers the clock and data, and delivers both to the receiver parallel interface.
The SCAN921025 and SCAN921226 also feature two test modes that provide interconnect test access on and between low voltage differential (LVDS) channels.
Boundary scan test access is provided to the digital (TTL) side of the devices using the industry standard IEEE 1149.1 (JTAG) protocol.
In addition, the chipset features a JTAG initiated at-speed built-in-self-test (BIST) to verify interconnects at normal system operating frequency.
National's SCAN921260UJB is ideally suited for applications such as wireless basestations that use multiple deserialisers on the same printed circuit board.
Integrating six deserialisers in the same package reduces overall system cost and saves board space.
National's SCAN921260UJB features three test modes that provide interconnect test access on the device and between LVDS channels.
Industry standard IEEE 1149.1 boundary scan test access is provided to the digital transistor-transistor logic (TTL) side of the devices.
The product also features an at-speed BIST test mode accessible through the test access port to verify interconnects at the system frequency.
In addition, the BIST ALONE mode supports bit error rate testing without activating the 1149.1 test access port for continuous testing with live traffic on adjacent channels.
When used with a National SCAN LVDS serialiser such as SCAN921023, the complete spectrum of interconnect faults can be detected.
National's SCAN921025 is a 10:1 (TTL to LVDS) serialiser with frequency operation of 30 MHz to 80 MHz.
It is available in a 7 x 7mm, 49-pin BGA package and priced at $10.00 each in quantities of 1000 units.
National's SCAN921226 is a 1:10 (LVDS to TTL) deserialiser with random lock and frequency operation of 30 to 80MHz, also in a 7 x 7mm, 49-pin BGA.
It is priced at $10.00 each in quantities of 1000 units.
National's SCAN921260UJB is offered at $43.78 each in quantities of 1000 units.
• National Semiconductor: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
