QTT161-38.400MDG-T

Overview

The QTT161-38.400MDG-T is a temperature-compensated crystal oscillator (TCXO) manufactured by QST. It operates at a nominal frequency of 38.4 MHz with a clipped sine wave output type. The device requires a supply voltage of 1.8V and exhibits a frequency stability of ±500 ppb (±0.5 ppm). It is housed in a compact 4-SMD, no-lead package with dimensions of 1.60mm x 1.20mm. The operational temperature range extends from -30°C to +85°C.

Feature Summary

• Provides stable clock signals via temperature compensation technology
• Delivers clipped sine wave output for digital interface compatibility
• Designed for low-voltage operation at 1.8V
• Utilizes a quartz resonator base for high precision

Applications

• Portable electronic devices requiring precise timing
• Communication modules needing stable carrier frequencies
• Industrial control systems operating in varying temperatures
• Consumer electronics utilizing 38.4 MHz clock references

Procurement Notes

Verify the specific suffix 'MDG' against the manufacturer's current datasheet to confirm pinout and electrical specifications. Ensure the 1.8V supply requirement aligns with system design constraints. Confirm RoHS compliance status if required for regulatory adherence. Check for lead-free certification documentation prior to integration into final assemblies.

Selection Notes

Select this component when a 38.4 MHz reference is required with ±0.5 ppm stability over an industrial temperature range. The 1.8V supply voltage makes it suitable for battery-powered or low-power applications. The small 1.6x1.2mm footprint aids in space-constrained PCB layouts. Consider the clipped sine wave output compatibility with downstream logic levels.

Part Context

This part belongs to the QTT161 series of TCXOs from QST. The series offers various frequency options within a standardized 1.6x1.2mm SMD package. Other variants in the family include different frequencies such as 26 MHz and 40 MHz, sharing similar form factors and voltage requirements but differing in specific frequency and stability parameters.

Replacement Considerations

Direct substitutes may include other 38.4 MHz TCXOs in 1.6x1.2mm packages with 1.8V supply and clipped sine outputs. Verify equivalent stability ratings and temperature ranges before substitution. Cross-reference pin configurations to ensure mechanical and electrical compatibility without circuit modification.