QTT252-38.400MBG-T

Overview

The QTT252-38.400MBG-T is a temperature-compensated crystal oscillator (TCXO) manufactured by QST. It operates at a nominal frequency of 38.4 MHz and delivers a clipped sine wave output signal. The device is designed for surface-mount integration using a 4-SMD, no-lead package configuration. It requires a supply voltage of 3.3V and draws a maximum supply current of 2mA. Frequency stability is specified at ±500ppb over the operating temperature range of -30°C to +85°C. The component features a seated height maximum of 0.031 inches (0.80mm), ensuring compatibility with standard PCB assembly processes.

Feature Summary

• Temperature compensation ensures stable frequency performance across varying thermal conditions
• Compact surface-mount design facilitates automated PCB assembly
• Low power consumption profile suitable for energy-efficient applications

Applications

• Telecommunications equipment requiring precise clock synchronization
• Consumer electronics utilizing high-frequency timing references
• Industrial control systems needing reliable oscillator sources

Procurement Notes

Verify that the specific part number matches the required frequency and package type before ordering. Confirm that the supplier provides genuine components from authorized channels to ensure reliability. Check technical specifications against system requirements, particularly regarding voltage levels and output waveform characteristics. Ensure compliance with regional shipping restrictions if applicable.

Selection Notes

Choose this component when a stable 38.4 MHz reference is needed in a small form factor. Consider the ±500ppb stability requirement relative to system jitter tolerance. Evaluate the 3.3V supply constraint against available power rails. Assess the clipped sine wave output compatibility with downstream logic or amplifier stages.

Part Context

This TCXO belongs to the QTT252 series, which offers various frequency options within a standardized footprint. The series targets applications demanding better stability than standard crystals but lower cost than oven-controlled oscillators. The 4-SMD package is common in modern compact electronic designs.

Replacement Considerations

Direct substitutes must match the 38.4 MHz frequency, 3.3V supply, and 4-SMD package. Verify equivalent stability and current draw specifications. Cross-reference pinout definitions to ensure electrical compatibility without circuit modification.