74LVCH1T45GM,132

Overview

The Nexperia 74LVCH1T45GM,132 is a single-bit dual-supply translating transceiver with 3-state outputs. It enables bidirectional level translation between voltage nodes ranging from 1.2 V to 5.5 V. The device features two 1-bit input-output ports (A and B), a direction control input (DIR), and dual supply pins (VCC(A) and VCC(B)). Pins A and DIR are referenced to VCC(A), while pin B is referenced to VCC(B). It supports maximum data rates up to 420 Mbps for 3.3 V to 5.0 V translation. The component includes IOFF circuitry for partial power-down applications and active bus hold circuitry.

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
• 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, 2.5 V, 3.3 V, and 5.0 V
• Systems utilizing mixed voltage domains where controlled data transmission direction is required

Procurement Notes

Verify the specific suffix GM corresponds to the XSON6 package type SOT886 with dimensions 1 x 1.45 x 0.5 mm. Confirm the temperature range covers -40 °C to +125 °C. Ensure the ordering code matches the LVCH family variant which includes bus hold functionality, distinct from the standard LVC version. Check RoHS compliance status against current manufacturing declarations.

Selection Notes

Select this component when active bus holding is required to stabilize floating inputs without external resistors. Choose the LVCH variant over the standard LVC version specifically for its internal bus hold feature. Verify that the application requires a single channel with explicit direction control via the DIR pin rather than auto-direction sensing. Ensure the operating environment falls within the specified -40 °C to +125 °C temperature range.

Part Context

This part belongs to the 74LVCH1T45 series of dual supply translating transceivers manufactured by Nexperia. It shares functional similarities with the 74LVC1T45 but adds bus hold capabilities. The GM suffix indicates packaging in an extremely thin small outline package without leads, specifically the XSON6 form factor designated as SOT886.

Replacement Considerations

74LVC1T45GM,132