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NATIONAL SEMICONDUCTOR SETS THE STANDARD FOR PERFORMANCE WITH ITS NEW ULTRA LOW POWER PHASE LOCKED LOOPS

Oct 7, 1996

October 7, 1996 -- National Semiconductor Corporation® announced today the addition of eight new ultra low power single and dual phase locked loops (PLLs) to its PLLatinum™ family of frequency synthesizers. By offering up to a 60% reduction in power consumption, a wider operating voltage range, and the industry's lowest phase noise floor, National's new low-power PLL family clearly sets the industry standard for frequency synthesizer performance.

The new PLLatinum family members include three low-power single PLLs (LMX2306, LMX2316, LMX2326) and five low-power dual PLLs (LMX2330L, LMX2331L, LMX2332L, LMX2335L, LMX2336L) which constitute the next generation of high performance ICs for the wireless and mobile RF market introduced by National.

To maintain the high performance specifications while lowering the power consumption of these new PLLs, National has optimized its BiCMOS process, implimented a new patented three-sided emitter RF transistor architecture, and utilized an improved signal isolation technique. All of the new low power PLLs are fabricated in National's ABiC V™ BiCMOS process, which enables the integration of RF, high performance analog, and digital functions onto a single integrated circuit.

"By adding low-power functionality to both the single and dual PLL families, National can offer our customers the best in phase-locked-loop circuits," said Greg Ravenscroft, product marketing manager of National's Wireless Communications Group. "Rather than sacrificing phase noise levels for a reduction in power consumption or vice-versa, we paid close attention to the design techniques and packaging of previous single and dual PLL releases and discovered a way to offer both benefits."

The members of the PLLatinum low-power single PLL family are the LMX2306 (.500 GHz, 1.2 mA), the LMX2316 (1.2 GHz, 2 mA), and the LMX2326 (3.0 GHz, 3.5 mA). These new offerings incorporate an enhanced architecture including digital lock detect, a 16-pin TSSOP package, and an enhanced FastLock™ feature with hardware timer support. Compatible with the JEDEC 2.5V Vcc standard, these low-power PLLs can operate within a voltage range of 2.3 - 5.5V, while maintaining the lowest phase noise floor in the industry (-167 dBc/Hz).

The members of the PLLatinum low-power dual PLL family are the LMX2330L, LMX2331L, LMX2332L, LMX2335L, and LMX2336L. These devices operate within a 2.7 - 5.5 voltage range and up to the 2.5 GHz frequency band. The LMX233xL family has the same pinout and programming models as National's LMX233xA family. The new low power dual PLLs leverage National's expertise and success in architectural processes and circuit design techniques to provide excellent charge pump leakage and balance as well as the industry's best phase noise floor (-169dBc/Hz). The new low power PLLs offer a 60% reduction in power consumption and are pin-compatible with existing National dual PLLs (LMX233xA family). The LMX233xL are additions to the family, not replacements for current products. National now has over 20 PLLs to satisfy customer needs.

National's PLL customer base includes the leading companies that design and manufacture wireless communications products, supporting a range of digital standards such as IS-54, IS-95, GSM, DCS1800, PDC and PHS. Companies such as Motorola, Ericsson, Nokia have benefited from National's first generation PLL families, and will now be able to further optimize their product designs while minimizing cost, based on National's new low-power PLL offerings.

PLLs can be used for a number of applications including cordless/cellular telephones, wireless LANs private mobile radio, direct broadcast satellite, and global positioning systems. These types of applications demand light weight and small size, low operating voltage, low noise, and higher operating frequencies; demands that are met with National's family of single and dual PLLs.

The National PLLatinum family of low power dual PLLs are available in sample quantities now with the singles being available in 5 weeks. Both single and dual low power PLLs are expected to be in full production by the end of the year. Pricing for the low-power single and dual PLLs will vary based on features and package options. Thousand unit pricing for the low-power single PLLs ranges from $3.45 to $4.95, and thousand unit pricing for dual PLLs ranges from $4.50 to $6.95.

National Semiconductor produces analog and mixed-signal based silicon solutions for the information highway, communications, consumer and industrial markets. National Semiconductor is headquartered in Santa Clara, California, and has 20,000 employees worldwide. In fiscal 1996, the company reported sales of $2.6 billion. Additional company information is available on the World Wide Web at http://www.national.com.