74LVCH1T45GW-Q100H

Overview

The Nexperia 74LVCH1T45GW-Q100H is a single-bit, dual-supply translating transceiver with 3-state outputs designed for bidirectional level translation. It features two 1-bit input-output ports (A and B), a direction control input (DIR), and independent supply pins VCC(A) and VCC(B). Both supplies support voltages from 1.2 V to 5.5 V, enabling translation between low voltage nodes including 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V. The device operates within an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Active bus hold circuitry maintains unused or floating data inputs at valid logic levels.
• IOFF circuitry disables outputs to prevent damaging backflow current during partial power-down applications.
• Suspend mode activates when either supply pin reaches GND level, placing both ports in a high-impedance OFF-state.

Applications

• Bidirectional level translation between different low voltage nodes
• Partial power-down applications requiring IOFF functionality
• Automotive electronic systems

Procurement Notes

Verify the specific ordering suffix 'GW' corresponds to the TSSOP6 plastic thin shrink small outline package (SOT363-2) before procurement. Confirm that the '-Q100H' designation indicates AEC-Q100 Grade 1 qualification and the extended operating temperature range up to +125 °C. Ensure the required package type matches the design footprint specifications.

Selection Notes

Select this component when active bus hold functionality is required to manage floating inputs. Choose this part over the standard 74LVC1T45 variant if the application demands protection against backflow currents during power-down states via IOFF circuitry. Verify that the dual-supply architecture aligns with the system's voltage domain requirements.

Part Context

This device belongs to the Nexperia 74LVCH1T45-Q100 family of dual supply translating transceivers. It shares functional similarities with the 74LVC1T45-Q100 but includes additional bus hold features. The product is qualified to the Automotive Electronics Council standard Q100 (Grade 1) for automotive use.

Replacement Considerations

The 74LVC1T45GW-Q100H is a related variant within the same family. Note that the standard 74LVC1T45 lacks the active bus hold circuitry present in the LVCH version.