The SIT8009ACT82-33E-121.400000 from SiTime is a 121.4 MHz MEMS standard crystal oscillator (XO) with LVCMOS output at 3.3 V, featuring enable/disable, in a 4-SMD no-lead package.
The SIT8009ACT82-33E-121.500000 from SiTime is a 121.5 MHz MEMS standard crystal oscillator (XO) with LVCMOS output at 3.3 V, featuring enable/disable, in a 4-SMD no-lead package.