74AXP2T45DCH

Overview

The Nexperia 74AXP2T45DC,125 is a 2-bit dual supply translating transceiver with 3-state outputs. It enables bidirectional level translation between two independent voltage domains, VCC(A) and VCC(B), both ranging from 0.9 V to 5.5 V. The device features two data input-output ports (nA and nB) and a direction control input (DIR). Pins A and DIR are referenced to VCC(A), while pin B is referenced to VCC(B). A HIGH on DIR allows transmission from A to B, and a LOW allows transmission from B to A. It supports partial power-down applications using IOFF circuitry to prevent backflow current.

Feature Summary

• Patented glitch prevention circuitry eliminates output glitches during power supply transitions without requiring power supply sequencing.
• IOFF circuitry provides partial power-down mode operation by disabling outputs to prevent damaging backflow current when powered down.
• High noise immunity with low overshoot and undershoot, complying with multiple JEDEC standards for various voltage nodes.
• Suspend mode automatically places both ports in high-impedance OFF-state when either supply voltage is at GND level.

Applications

• Bidirectional logic level-shifting between different voltage domains
• Partial power-down applications requiring backflow current protection
• Systems with varying supply voltages where glitch-free transitions are critical

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74AXP2T45 family includes distinct packages like VSSOP8 and X2SON8. Confirm that the DC suffix corresponds to the VSSOP8 plastic very thin shrink small outline package. Ensure compatibility with the target system's voltage levels and temperature range specifications before procurement.

Selection Notes

Select this component when bidirectional translation between 0.9 V and 5.5 V domains is required without power sequencing constraints. It is suitable for designs needing glitch-free operation during power-up/down cycles. Consider the VSSOP8 package for space-constrained PCB layouts. Verify that the DIR pin control logic aligns with the desired transmission direction requirements.

Part Context

The 74AXP2T45 is part of Nexperia's advanced translating transceiver family designed for low-voltage applications. It addresses the need for reliable level shifting in systems with multiple power domains. The device integrates features like suspend mode and IOFF protection, making it robust for industrial and consumer electronics. It complements other level shifters by offering patented glitch prevention technology.

Replacement Considerations

Check for equivalent 2-bit dual-supply translators with similar voltage ranges and IOFF capabilities. Ensure any substitute supports the same VSSOP8 package or has a compatible footprint. Verify that the replacement also offers glitch-free operation and complies with relevant JEDEC standards for noise immunity.