(NASDAQ: SLAB), a leader in high-performance, analog-intensive, mixed-signal integrated circuits (ICs), today reported financial results for its third quarter ended Sept. 28, 2013. Overall revenue in the third quarter was $146.9 million, an increase of 3.8 percent sequentially and a 1.7 percent decrease compared with the same period a year ago.
On a GAAP basis, gross margins were 60.0 percent. GAAP R&D investment increased on a sequential basis and year over year to $40.7 million. GAAP SG&A expenses increased both sequentially and year over year to $37.0 million. Resulting GAAP operating income as a percentage of revenue decreased both sequentially and year over year to 7.1 percent. GAAP diluted earnings per share were $0.15, down 48.3 percent sequentially and down 37.5 percent year over year due primarily to Energy Micro acquisition-related items.
The non-GAAP results exclude the impact of stock compensation, amortization from acquired intangible assets and certain other items as set forth in the reconciliation table below. Non-GAAP gross margins decreased sequentially to 61.1 percent. On a non-GAAP basis, R&D expenses increased to $33.7 million, and SG&A expenses increased to $29.8 million. Non-GAAP operating income in the quarter was 17.9 percent. Non-GAAP diluted earnings per share in the quarter were $0.45, down sequentially and year over year.
Silicon Labs reported record revenue for Broadcast video products and solid performance for microcontroller (MCU) and timing products. Revenue from Broad-based products, which include MCU, timing, power and sensor products, represented 50 percent of total revenue in the third quarter, up 6.5 percent sequentially.
The company continues to expand its position in the Internet of Things (IoT) market with solid design win activity in home automation, smart energy and smart metering applications. Silicon Labs completed its first quarter with Energy Micro as a key part of the company. The teams and operational systems are fully integrated, and the product development roadmaps are aligned to enable the next generation of energy-friendly microcontrollers and radios. During the quarter, Silicon Labs introduced a new family of 8-bit MCUs optimized for cost-sensitive motor control and industrial applications.