ST2349AQTR

Translators, Level Shifters Overview

The ST2349AQTR is a 4-bit dual supply level translator manufactured by STMicroelectronics. It provides bidirectional voltage translation between low-voltage systems (VL: 1.65 V to 3.6 V) and higher-voltage systems (VCC: 1.80 V to 5.5 V). The device operates without a direction control pin, utilizing transmission gate-based design for automatic data transfer. It supports data rates up to 18 Mbps with totem pole drivers and 6.8 Mbps with open drain drivers. The component features a power-down mode that places I/Os in high impedance when supplies are off, ensuring low quiescent current of 8 µA maximum.

Translators, Level Shifters Feature Summary

• Bidirectional level translation capability without requiring a dedicated direction control pin
• Supports wide voltage ranges for both low-side (VL) and high-side (VCC) logic interfaces
• Includes power-down mode to maintain high-impedance states during supply shutdown
• Compatible with both totem pole and open drain driver configurations

Translators, Level Shifters Applications

• Low voltage system level translation
• I2C bus level translation
• UART interface level translation
• Mobile phones and other mobile devices

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix 'QTR' corresponds to the QFN16 package and tape-and-reel packaging configuration as documented in the official datasheet. Confirm that the application environment strictly adheres to the recommended operating conditions regarding supply voltages and temperature ranges. Ensure proper decoupling capacitors are utilized near the VL and VCC pins to maintain signal integrity and stability during operation.

Translators, Level Shifters Selection Notes

Select this component when interfacing circuits with different logic voltage levels, specifically where VL ranges from 1.65 V to 3.6 V and VCC ranges from 1.80 V to 5.5 V. It is suitable for applications requiring bidirectional data transfer without complex control logic. Consider the package size and drive requirements, noting that the output is open-drain type and requires appropriate pull-up resistors for correct high-state maintenance.

Translators, Level Shifters Part Context

The ST2349A belongs to the family of dual supply level translators designed for multi-voltage system integration. It facilitates communication between low-voltage ASICs or PLDs and higher voltage systems. The device utilizes a transmission gate architecture to enable seamless data transfer across voltage domains without external direction control signals, simplifying circuit design for mixed-voltage environments.

Translators, Level Shifters Replacement Considerations

ST2349BQTR

Translators, Level Shifters FAQ

How does the ST2349AQTR handle power-down scenarios?

When either supply is off or the OE pin is driven low while VCC is grounded, all I/Os enter a high-impedance state, preventing current consumption from floating gates.

What is the maximum data rate supported by this device?

The device supports a maximum data rate of 18 Mbps when driven by a totem pole driver and 6.8 Mbps when driven by an open drain driver.