TTL clock source at 64 MHz, 5 V rail
The ECS-100AX-640 is a standard TTL-output crystal oscillator in the ECS-100X family, delivering a fixed 64 MHz clock from a single 5 V supply. The TTL output level sits at a fixed 5 V swing — it interfaces directly with 5 V logic families without termination, but level shifting is required for 3.3 V or lower rail devices downstream. The metal can package shields the output from external EMI, which matters in noisy supply environments near motor drives or switched-mode rails.
Frequency stability and the real ppm budget
At 64 MHz that translates to a worst-case drift ceiling of roughly ±6.4 kHz across the full temperature span — the system designer must confirm that budget clears the setup/hold margin on the downstream logic, especially at higher clock rates where cycle time is tighter.
Supply current and power budget
Maximum supply current is 70 mA — the oscillator draws that continuously regardless of output state. For battery-backed or power-sequenced systems, factor this as a steady-state load: it exceeds the quiescent current of most low-dropout regulators, so a dedicated LDO or rail gate may be worth isolating from shared supply rails.
14-DIP metal can: footprint and assembly reality
It is a through-hole part — incompatible with SMT reflow and requires wave or hand soldering. Lead forming to adapt to a horizontal or vertical PCB orientation is common practice; the can body is the ground reference, so a solid mechanical connection to the PCB plane matters for EMI performance.