74LVCH1T45GW,125

Overview

The Nexperia 74LVCH1T45GW,125 is a single-bit dual-supply translating transceiver with 3-state outputs. It enables bidirectional level translation between ports A and B, referenced to VCC(A) and VCC(B) respectively. The device supports supply voltages from 1.2 V to 5.5 V on both ports. It features a direction control input (DIR) to manage transmission flow. The component includes IOFF circuitry for partial power-down applications and active bus hold circuitry to maintain valid logic levels on floating inputs.

Feature Summary

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

Applications

• Partial power-down applications requiring isolation of powered-down sections
• Bidirectional level translation between low voltage nodes such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V
• Systems requiring controlled transmission direction via external DIR signal

Procurement Notes

Verify the specific suffix 'GW' corresponds to the TSSOP6 plastic thin shrink small outline package (SOT363-2). Confirm the temperature range requirement matches the -40 °C to +125 °C specification documented for this variant. Ensure compatibility with the required operating conditions for both VCC(A) and VCC(B) supplies before finalizing procurement orders.

Selection Notes

Select this component when a single-channel bidirectional translator with explicit direction control is required. The LVCH series provides active bus hold functionality not present in standard LVC variants. Verify that the application requires independent supply rails for port A and port B to utilize the dual-supply translation capability effectively.

Part Context

This part belongs to the 74LVC/LVCH family of dual supply translating transceivers. The 'H' designation indicates the inclusion of active bus hold circuitry. The 'GW' suffix identifies the specific SOT363-2 (TSSOP6) package type. It serves as a functional equivalent to the 74LVC1T45 but with added input holding capabilities for robust operation in noisy environments.

Replacement Considerations

The 74LVC1T45GW,125 is a parameter-equivalent alternative within the same package, though it lacks the active bus hold feature found in the LVCH version.