74AXP2T45GXX

Overview

The Nexperia 74AXP2T45 is a 2-bit dual supply translating transceiver with 3-state outputs. It supports bidirectional level translation between voltage nodes ranging from 0.9 V to 5.5 V, 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. It features low input capacitance (1.4 pF typical) and low static power consumption (2 μA maximum). Propagation delays vary based on supply voltages, typically ranging from 1.2 ns to 40 ns.

Feature Summary

• Patented circuitry prevents output glitches during power supply transitions without requiring sequencing.
• IOFF circuitry enables partial power-down mode by disabling outputs to prevent damaging backflow current.
• Inputs accept voltages up to the maximum supply limit of 5.5 V for direct interfacing.

Applications

• Bidirectional logic level-shifting between mixed-voltage systems
• Unidirectional logic level-shifting applications
• Partial power-down mode operation in multi-supply environments

Procurement Notes

Verify the specific package variant required for the design, such as VSSOP8 or X2SON8, as these are distinct ordering options. Confirm that the application voltage ranges align with the 0.9 V to 5.5 V specifications. Ensure thermal management considerations are addressed if operating near the maximum power dissipation limits defined in the datasheet.

Selection Notes

Select this component when interfacing systems with widely varying supply voltages, including 5.0 V and lower nodes like 1.2 V. The absence of an output enable pin simplifies control logic but requires careful direction pin management. Consider the low capacitance characteristics for high-speed signal integrity requirements across different voltage domains.

Part Context

This device belongs to the 74AXP series of translating transceivers designed for robust voltage level shifting. Unlike standard translators, it supports a wider voltage range extending to 5.5 V and includes specific glitch prevention features. It serves as a bridge for digital communication between subsystems operating at different logic levels.

Replacement Considerations

Check for 74AVC2T45 variants if the application does not require 5.5 V support or glitch-free power-up behavior. Verify pin compatibility if substituting with other 2-bit translators, noting differences in supply voltage ranges and package types.