ST2149QTR

Translators, Level Shifters Overview

The ST2149QTR is a 4-bit dual supply level translator in a QFN16 package. It supports bidirectional data transfer between low-voltage ASICs/PLDs and higher voltage systems without a direction control pin. The device accepts VL from 1.65 to 3.6 V and VCC from 1.65 to 5.5 V, with a maximum data rate of 84 Mbps at 1.8 V/3.3 V. It features tri-state outputs, power-down mode for high-impedance I/Os when VCC is off, and ±2 kV HBM ESD protection.

Translators, Level Shifters Feature Summary

• Bidirectional level translation architecture that operates automatically without a dedicated direction control pin
• Wide operating voltage range accommodating multiple logic levels across two independent supplies
• Power-down mode capability that forces all I/Os into a high-impedance state when the VCC supply is inactive
• Totem-pole driving structure combined with robust electrostatic discharge protection on all pins

Translators, Level Shifters Applications

• Low voltage system level translation
• Mobile phone and other mobile devices
• Data transfer between low-voltage ASICs and higher voltage systems

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details. Ensure the selected variant matches the required tape and reel specifications for automated assembly processes. Confirm environmental compliance grades such as ECOPACK if applicable to your manufacturing standards.

Translators, Level Shifters Selection Notes

Select this component when interfacing circuits with different supply voltages requiring automatic bidirectional translation. Ensure the driver can source and sink at least 1 mA current. Verify that resistive loads do not exceed 50kΩ to maintain proper operation of the internal one-shot circuitry during state transitions.

Translators, Level Shifters Part Context

This part belongs to the ST2149 family of 4-bit dual supply level translators. It provides a compact solution for multi-voltage system integration using a small QFN16 footprint. The design eliminates the need for external direction control signals, simplifying board layout and reducing component count in dense electronic assemblies.

Translators, Level Shifters Replacement Considerations

No public confirmed substitute part numbers are available.