Electronic Components HCMOS / TTL Clock Oscillator Tusonix/CTS Electronic Components offers the HCMOS / TTL Clock Oscillator 632 in a ceramic package with reduced size and enhanced stability. The 632 Series features a standard 3.2x2.5mm surface mount footprint, frequency range of 1.0 - 50 MHz, +1.8Vdc,+2.5Vdc,+3.3Vdc operation, ±50 ppm frequency stability, and an operating temperature range of -40°C to +85°C.The oscillators are HCMOS / TTL compatible and feature fundamental and third overtone crystals.