Thermistor-integrated 19.2 MHz crystal
The ECS-192-7-37TC-CZY-TR: The ECX-1637TC series pairs a 19.2 MHz fundamental-mode crystal with an on-board thermistor, making it a drop-in frequency-reference subassembly for temperature-compensation loops rather than a bare crystal requiring external NTC placement. At 19.2 MHz in fundamental mode the crystal pullability — the frequency shift available from a given load-capacitance change — is governed by the motional capacitance ratio, so the thermistor's resistance change across the -30°C to +85°C operating band feeds the compensation network directly without extra placement.
Compact footprint and frequency grade
The 2.05mm by 1.65mm body with 0.80mm seated height is the standard ECX-1637TC package — the no-lead format demands a matched land pattern for reliable solder-joint formation, and the 0.031-inch max height constrains any enclosure interference in thin-profile assemblies. Frequency tolerance of ±10ppm at 25°C and stability of ±12ppm across the operating temperature range define the accuracy grade — a TCXO loop using this reference targets sub-ppm residual error after compensation, and the ±10ppm initial tolerance is the error budget entry point before the thermistor loop closes.