74LVQ240QSC

Overview

The Fairchild Semiconductor 74LVQ240QSC is an octal buffer and line driver featuring inverting logic with three-state outputs. It operates within a supply voltage range of 3.0 V to 3.6 V, making it suitable for low-power applications. The device utilizes a 20-pin QSOP package and supports bidirectional data transmission. Key electrical characteristics include a propagation delay of 8 ns at 3.3 V and 6.5 ns at 5 V, with output drive capabilities of -24 mA high and 24 mA low. It functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Implements patented EMI reduction circuitry for enhanced signal integrity
• Provides bidirectional data transfer capability between two buses
• Features three-state outputs to facilitate bus-driven environments

Applications

• Low power/low noise 3.3V applications
• Bidirectional bus-oriented architectures
• Memory and memory mapping systems

Procurement Notes

Verify the specific suffix QSC against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with onsemi or Fairchild archives, as legacy availability may vary. Confirm that the delivered components match the specified 20-QSOP form factor before integration into production lines.

Selection Notes

Select this component when designing systems requiring low-voltage operation specifically around 3.3 V with strict EMI constraints. It is appropriate for applications needing bidirectional buffering with minimal power consumption. Compare performance metrics such as propagation delay and output current against alternative logic families to ensure timing requirements are met. Consider the physical package size if board space is limited.

Part Context

This component belongs to the LVQ series of low-voltage CMOS logic devices. It serves as a successor or variant to standard 74LS240 buffers, offering improved power efficiency and lower noise profiles. The device is manufactured by Fairchild Semiconductor, which has since been acquired by onsemi, affecting long-term support channels.

Replacement Considerations

Direct substitutes include the 74LVQ240 in different packages or the 74LVC240 for broader voltage compatibility. Verify pin-to-pin compatibility before swapping. Check for updated revisions from onsemi if sourcing new inventory.