74LVCH245APW-Q100J

Overview

The Nexperia 74LVCH245APW-Q100J is an octal bus transceiver with 3-state outputs, designed for mixed 3.3 V and 5 V environments. It operates within a supply voltage range of 1.2 V to 3.6 V and supports input voltages up to 5.5 V. The device features Schmitt-trigger inputs for slow signal tolerance and includes IOFF circuitry for partial power-down protection. Qualified to AEC-Q100 Grade 1 standards, it functions reliably from -40 °C to +125 °C. Propagation delay ranges from 1.5 ns to 8.7 ns depending on voltage. It utilizes TSSOP20 (SOT360-1) packaging.

Feature Summary

• Bus hold functionality on all data inputs to maintain stable logic states
• IOFF circuitry prevents backflow current during partial power-down modes
• Schmitt-trigger action ensures tolerance for slower input rise and fall times
• Overvoltage tolerant inputs allow direct interfacing with 5 V logic devices

Applications

• Automotive electronic systems requiring AEC-Q100 Grade 1 qualification
• Mixed voltage level translation between 3.3 V and 5 V logic domains
• Octal bidirectional data bus transmission in industrial control systems

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP20 package variant when sourcing. Confirm that the 'Q100J' designation aligns with automotive-grade reliability requirements. Ensure the ordering code matches the exact temperature range specifications required for the target application environment before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring robust interface capabilities between disparate voltage levels. The inclusion of bus hold circuits simplifies PCB layout by reducing external component needs. Verify that the operating temperature range meets environmental constraints. Consider the low-power CMOS characteristics for energy-efficient designs requiring high-speed data transfer across wide buses.

Part Context

This part belongs to the Nexperia 74LVC/LVCH245A-Q100 family of octal bus transceivers. It shares functional similarities with other members like the 74HCT245PW-Q100J but differs in supply voltage compatibility and input threshold characteristics. The LVCH series specifically targets lower voltage applications while maintaining 5 V tolerance, distinguishing it from standard HCT or HC logic families.

Replacement Considerations

Direct substitutes include other 74LVCH245 variants from Nexperia such as the SO20 package version (74LVCH245AD-Q100). Cross-vendor replacements must match the 8-bit width, 3-state output capability, and AEC-Q100 automotive qualification. Verify pinout compatibility and electrical parameters before substituting.