1 GHz programmable oscillator in a 7×5 mm QFM package
The Texas Instruments LMK61E2BBA-SIAT is a clock oscillator that can be factory-programmed to one of three output frequencies: 400 MHz, 900 MHz, or 1 GHz. It operates from a 3.135 V to 3.465 V supply rail and draws 162 mA typical. The device is housed in an 8-SMD module, specifically the 8-QFM (7×5) package, which is a 7 mm by 5 mm surface-mount footprint with an exposed thermal pad for heat sinking into the PCB.
Industrial temperature range and supply tolerance
This allows the oscillator to be used in outdoor telecom equipment, base stations, and factory-floor networking hardware without a heated enclosure. The supply voltage tolerance of 3.135 V to 3.465 V (±5% around a 3.3 V nominal) means the oscillator maintains its specified jitter and frequency accuracy even when the board's 3.3 V rail droops under load or during startup transients. The 162 mA supply current is the total current drawn from this rail, including the output buffer.