QT252S-40.000MEEQ-T

$0.51

Description：2.5X2.0 SEAM SEAL MHZ QUARTZ XTA
Series：QT252S
Mfr：QST
Package：Tape & Reel (TR)

SKU:1150b9b02776 Category: Crystals Brand: QST

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Product introduction

Product Detailed Parameters

Description：2.5X2.0 SEAM SEAL MHZ QUARTZ XTA
Series：QT252S
Mfr：QST
Package：Tape & Reel (TR)
Type：MHz Crystal
Frequency：40 MHz
Frequency Stability：±10ppm
Frequency Tolerance：±10ppm
Load Capacitance：10pF
ESR (Equivalent Series Resistance)：60 Ohms
Operating Mode：Fundamental
Operating Temperature：-20°C ~ 70°C
Ratings：-
Mounting Type：Surface Mount
Package / Case：4-SMD, No Lead
Size / Dimension：0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)：0.022" (0.55mm)

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QT252S-40.000MEEQ-T

Overview

The QT252S-40.000MEEQ-T is a surface-mount quartz crystal oscillator manufactured by QST, operating at a nominal frequency of 40 MHz. It features a 2.5 x 2.0 mm body size with a height of 0.55 mm. The component utilizes a seam seal package construction and offers a load capacitance of 10 pF. Frequency stability is rated at ±10 ppm at 25°C and ±10 ppm across the -20 to +70°C temperature range. The device employs a four-pad no-lead SMD configuration for direct board mounting.

Feature Summary

Seam seal package construction for environmental protection
Four-pad no-lead surface mount design
High frequency stability within specified industrial temperature ranges

Applications

Clock signal generation for microprocessors
Timing reference for communication interfaces
Oscillator circuits in consumer electronics

Procurement Notes

Verify manufacturer designation as QST or TXC depending on specific supply chain documentation. Confirm exact dimensional tolerances against the official datasheet before PCB layout finalization. Ensure compatibility with reflow soldering profiles recommended for seam seal packages. Validate load capacitance requirements match the host circuit design specifications.

Selection Notes

Select this component when a 40 MHz timing source is required in compact space-constrained designs. The 10 ppm stability suits applications demanding precise clock synchronization. Consider the 10 pF load capacitance requirement for oscillator circuit tuning. Evaluate the 2.5 x 2.0 mm footprint against available board real estate constraints.

Part Context

This part belongs to the QT252S series of miniature quartz crystals. The series is characterized by small form factors suitable for modern portable devices. Similar variants exist with different frequencies and stability ratings. The seam seal technology distinguishes these components from standard ceramic packaged alternatives.