ECS ECS-100x Clock Oscillators are fully compatible with TTL circuitry. These oscillators come in a metal shielding package with pin 7 case ground that acts as shielding to minimize radiation. The ECS-100x oscillators operate at 3.3V optional supply voltage with a wide frequency range. These oscillators operate at a wide frequency range of 1MHz to 150MHz and come in a industry-standard footprint.