74LVCH245ADB,118

Overview

The Nexperia 74LVCH245ADB,118 is an octal bus transceiver with 3-state outputs housed in a SO20 plastic small outline package (SOT163-1). It operates within a supply voltage range of 1.2 V to 3.6 V and supports ambient temperatures from -40 °C to +125 °C. The device features overvoltage tolerant inputs up to 5.5 V, allowing direct interfacing with 3.3 V or 5 V devices. Propagation delay ranges from 1.5 ns to 16.9 ns depending on voltage. Bus hold circuitry maintains valid logic levels on data inputs.

Feature Summary

• Bus hold functionality on all data inputs prevents floating states
• IOFF circuitry enables partial power-down mode operation
• Overvoltage tolerant inputs support mixed 3.3 V and 5 V environments
• Schmitt-trigger action ensures tolerance for slow input transitions

Applications

• Mixed voltage bus translation between 3.3 V and 5 V systems
• Partial power-down applications requiring backflow current prevention
• Octal bidirectional bus interfaces with direction control

Procurement Notes

Verify the specific ordering suffix matches the required package type and temperature grade. Confirm that the 'ADB' designation corresponds to the SO20 (SOT163-1) variant as specified in the official Nexperia documentation. Ensure compliance with JEDEC standards relevant to the target operating voltage range before finalizing procurement specifications.

Selection Notes

Select this component when bidirectional level shifting between 3.3 V and 5 V domains is required without external components. The LVCH series provides bus hold capabilities absent in standard LVC variants, simplifying PCB layout by eliminating pull-up or pull-down resistors. Verify that the 3.6 V maximum supply voltage aligns with the system's power rails.

Part Context

This part belongs to the 74LVC/LVCH245A family of octal bus transceivers manufactured by Nexperia. It shares functional similarities with other members like the 74LVC245AD but includes the 'H' designation indicating integrated bus hold circuits. The family supports various packages including TSSOP and QFN, with the ADB suffix specifically identifying the SO20 configuration.

Replacement Considerations

The 74LVC245ADB,118 serves as a non-bus-hold alternative within the same package. Cross-family replacements require verification of voltage compatibility and pinout alignment.