24 MHz fundamental in HC-49/US
A 24 MHz crystal running in fundamental mode, the ECS-240-16-5PX-TR uses an HC-49/US package — the through-hole barrel footprint that has been the default microcontroller clock reference for decades, now offered in a surface-mount variant. Load capacitance of 16 pF is the standard figure most microcontrollers expect for a parallel-resonant crystal circuit; the PCB layout and trace length to the MCU oscillator pins affect the actual effective load, so matching the crystal to the MCU's recommended external components matters more than the crystal spec alone.
Tolerance, stability, and ESR
±30 ppm initial tolerance and ±50 ppm frequency stability over the full operating range give a combined ±80 ppm worst-case deviation — tight enough for UART and SPI clocking at standard baud rates, but budget the error if you are deriving a precision timing base across temperature. Equivalent series resistance of 30 Ω is typical for this package at 24 MHz; higher ESR would reduce the drive level margin and risk startup failures, particularly at cold temperatures where the crystal impedance rises. Commercial temperature grade -10°C to 70°C suits indoor consumer and industrial equipment — not qualified for under-hood or outdoor ambient extremes.
Active status and sourcing posture
Surface-mount tape-and-reel packaging aligns with standard pick-and-place assembly flows for the HC-49/US footprint.