Programmable blank — user-configurable frequency
The DSC8121CI2 ships as a blank (unprogrammed) device; the user must program the desired output frequency using Microchip's TimeFlash field programmer or factory-programmed samples. This is a one-time non-volatile write — the frequency is locked after programming.
Lifecycle and supply posture
No pin-compatible second-source is listed on the evidence — the DSC8121 series is the sole reference for this footprint and frequency range.
