7V-12.288MAHE-T

Crystals Overview

The TXC Corporation 7V-12.288MAHE-T is a surface-mount quartz crystal resonator designed for precision timing applications. It operates at a nominal frequency of 12.288 MHz, which is mathematically derived as the 256x multiplier of a 48 kHz sampling rate, making it suitable for audio codec clock sources without requiring phase-locked loop (PLL) frequency division. The component utilizes a 3.2 x 2.5 mm SMD package with glass seal construction and features a load capacitance of 12 pF. It offers a frequency tolerance of ±30 ppm at 25°C and maintains stability within ±30 ppm across the operating temperature range of -20°C to +70°C. The unit exhibits an annual aging specification of ±3 ppm and supports a maximum drive level of 100 µW.

Crystals Feature Summary

• Glass-sealed quartz construction ensures long-term frequency stability and environmental resistance
• Optimized 12.288 MHz frequency output eliminates PLL complexity in 48 kHz audio systems
• Compact 3.2 x 2.5 mm surface-mount footprint facilitates high-density PCB layout
• Low equivalent series resistance allows direct interfacing with standard MCU or codec drivers

Crystals Applications

• Clock source generation for USB audio codecs
• Digital audio processing circuits requiring 48 kHz base sampling rates
• Communication equipment utilizing 12.288 MHz synchronization signals
• Consumer electronics with space-constrained surface-mount requirements

Crystals Procurement Notes

Verify that the specific ordering suffix corresponds to the mass-production A1 version rather than engineering sample variants. Confirm that the load capacitance matches the target circuit design to prevent frequency deviation. Ensure compliance with RoHS directives, noting that lead content in the glass seal may fall under specific exemptions. Validate moisture sensitivity level classification prior to assembly to determine if pre-soldering baking procedures are required for the storage conditions encountered.

Crystals Selection Notes

Select this component when a precise 12.288 MHz reference is required for audio applications to avoid fractional divider noise. Consider the -20°C to +70°C operating range against environmental demands; wider industrial grades may be necessary for extreme temperatures. Evaluate the 12 pF load capacitance requirement against PCB parasitic effects and trace length. Assess the ±30 ppm total stability against system jitter budgets. Verify that the 100 µW drive level compatibility exists with the host oscillator circuit to prevent over-driving the crystal.

Crystals Part Context

This part belongs to the TXC 7V series of miniature quartz crystals. It shares the 3.2 x 2.5 mm form factor with other members of the family but is distinguished by its specific 12.288 MHz frequency and 12 pF load capacitance configuration. The glass-seal technology differentiates it from ceramic-packaged alternatives, offering superior hermeticity. It serves as a fundamental passive timing element within active oscillator circuits or microcontroller clock inputs.

Crystals Replacement Considerations

Direct substitutes must match the 12.288 MHz frequency, 12 pF load capacitance, and 3.2 x 2.5 mm package dimensions. Verify that alternative manufacturers provide comparable ±30 ppm stability and similar ESR characteristics. Ensure the replacement part supports the same drive level and operating temperature range to maintain system reliability.