148.5 MHz fixed-frequency oscillator — video timing anchor
The LMK60A0-148M50SIAT is a fixed-frequency clock oscillator from Texas Instruments, delivering a 148.5 MHz output from a 3.135 V to 3.465 V supply rail. That frequency is the standard pixel clock for 1080p video at 60 Hz (SMPTE 274M) — if you are clocking an HDMI transmitter, a broadcast video encoder, or a professional camera FPGA, this oscillator drops straight into the timing tree without a PLL multiplying a lower fundamental. The part draws 152 mA typical at the rated output frequency.
Supply tolerance and decoupling reality
The supply range is 3.135 V to 3.465 V — that is a ±5 % window around a nominal 3.3 V rail. A standard 3.3 V switching regulator with ±2 % set-point accuracy and 50 mV ripple stays inside this band, but a regulator running at its output tolerance edge plus load-transient undershoot can dip below 3.135 V and cause the oscillator to lose lock or drop cycles.
Active lifecycle — no design-in risk
This part is safe to specify into a new BOM today — the risk of a forced redesign mid-production is negligible for the foreseeable future. ROHS3 compliant, so it passes the EU RoHS exemption review without an exemption certificate.