What the 1.8V HCMOS oscillator means for your clock rail
The ECS-3518-100-B-TR is a 10 MHz standard crystal oscillator (XO) delivering a HCMOS output level at 1.8 VDC rail. Budget the level shift if your downstream logic sits above 2.0 V. Maximum supply current is 7 mA. In a system with multiple clock domains, the Enable/Disable pin lets the MCU gate this oscillator without removing VDD — a sleeping peripheral stays quiet instead of burning 7 mA continuously.
±50ppm frequency stability across the commercial temperature window
Stated stability is ±50 ppm total over 0°C to 70°C ambient. That is a 10 ppm/°C drift budget across the window — acceptable for USB timing, UART baud clocks, and general microcontroller PLLs. It is not tight enough for Precision Time Protocol or GNSS disciplined references, but those applications do not look at a standard XO in the first place.
5×3.2mm package — seated height drives board stacking
At 1.30 mm tall this clears most standard socket headers beneath it, but check the component keep-out above the oscillator if a daughtercard or daughterboard stacks on the same bus board — the housing must not compress the oscillator body during panel press-fit.
Active status and sourcing posture
The Enable/Disable function on this specific variant means it is a differentiated SKU within the ECS-3518 series, not a commodity bulk-crystal drop-in, so sourcing should run against the exact order code. No official second-source alternative appears in the ledger.