9B-12.000MBBK-B

Crystals Overview

The TXC CORPORATION 9B-12.000MBBK-B is a quartz crystal resonator operating at a fundamental frequency of 12.000 MHz. It features a load capacitance of 20 pF and a frequency stability of ±50 ppm. The component utilizes an HC-49/US package with through-hole mounting capabilities, measuring 11.40 mm in length, 4.80 mm in width, and up to 4.10 mm in height. It operates within a temperature range of -20°C to +70°C and has an equivalent series resistance (ESR) of 40 Ohms maximum.

Crystals Feature Summary

• Fundamental mode quartz crystal operation
• Through-hole compatible HC-49/US package design
• Integrated 20 pF load capacitance specification

Crystals Applications

• Microcontroller clock source circuits
• Communication interface timing references
• General-purpose digital logic timing applications

Crystals Procurement Notes

This component is officially obsolete and no longer manufactured by TXC Corporation. Procurement should focus on verified parameter-equivalent substitutes from other manufacturers. Verify that replacement crystals match the 12 MHz frequency, 20 pF load capacitance, and HC-49/US footprint requirements to ensure circuit compatibility.

Crystals Selection Notes

Select replacement components based on strict electrical equivalence, specifically matching the 12 MHz fundamental frequency, 20 pF load capacitance, and ±50 ppm stability. Ensure the substitute supports the required -20°C to +70°C operating temperature range and maintains similar ESR characteristics for reliable oscillator startup.

Crystals Part Context

The 9B series represents standard through-hole quartz crystals designed for cost-effective timing solutions. This specific model provides a stable reference frequency for digital systems requiring moderate precision. Its discontinuation reflects industry shifts toward surface-mount technologies and MEMS alternatives.

Crystals Replacement Considerations

QT49S-12.000MBBK-T by QST is listed as a parameter-equivalent substitute.