Thermal stability and the ±500ppb figure
The ASVTX-13-D-40.000MHZ-I05-T is a voltage-controlled TCXO delivering a 40 MHz clipped sine wave output with ±500ppb frequency stability across its operating range.
Board-fit and the 4-SMD package
The 2.00mm × 1.60mm body with 0.80mm seated height is a standard compact ceramic package — the pad footprint follows the 4-SMD no-lead footprint with land pads on all four sides, and the part reflows per a standard SAC305 profile. The voltage-control pin on a VCTCXO is the frequency trim input; decoupling that pin locally keeps the tuning voltage free of switching noise that would otherwise fold into the PLL bandwidth and generate spurious sidebands. Supply current peaks at 2 mA, so PCB trace width for the 3.3 V rail is not a constraint — the limiting factor is the decoupling quality at the VC pin, not thermal rise.
Sourcing posture and the single-source question
The part carries Active lifecycle status from Abracon — it is currently in regular production with standard MOQ and lead times through distribution. Qualifying a same-series alternate from the ASVTX-13 family now — while the part is actively produced — is the window to hedge that exposure before it becomes a sourcing problem.