The OX-5021-EAE-1080-20M000 from Microsemi Corporation is a 20 MHz oven-controlled crystal oscillator (OCXO) with HCMOS output at 3.3 V, in a 6-SMD no-lead package.
The OX-5021-EAE-1080-24M576 from Microsemi Corporation is a 24.576 MHz oven-controlled crystal oscillator (OCXO) with HCMOS output at 3.3 V, in a 6-SMD no-lead package.