MC74LCX573DWG

Latches Overview

The MC74LCX573DWG is a low-voltage CMOS octal transparent latch with 3-state outputs, operating from a 1.65 V to 5.5 V supply. It features 5 V-tolerant inputs and outputs, allowing safe interfacing with 5.0 V devices. The device contains eight D-type latches controlled by Latch Enable (LE) and Output Enable (OE) inputs. Propagation delay ranges from 5.5 ns to 14.0 ns depending on voltage. It supports live insertion, offers near-zero static supply current, and includes an IOFF specification for high impedance when VCC is 0 V.

Latches Feature Summary

• Features 5 V tolerant inputs and outputs for direct interface with 5.0 V TTL logic
• Supports live insertion and withdrawal capabilities
• Provides balanced 24 mA output sink and source capability at 3 V
• Includes IOFF specification to guarantee high impedance state during power-off conditions

Latches Applications

• Interface between 5.0 V TTL logic and lower voltage CMOS systems
• Data storage in memory architectures requiring octal latching
• Buffering applications utilizing 3-state outputs for bus isolation
• System designs requiring live insertion and withdrawal support

Latches Procurement Notes

Verify the specific package suffix 'DW' corresponds to the SOIC-20 Wide Body configuration before procurement. Confirm that the component meets RoHS compliance standards as indicated by the 'G' suffix or '/C0071' marking. Ensure the ordering quantity aligns with the rail packaging specifications of 38 units per rail. Check for any automotive '-Q' suffix requirements if the application demands AEC-Q100 qualification.

Latches Selection Notes

Select this component when designing systems requiring an octal latch with 3-state outputs and 5 V tolerance. It is suitable for applications needing low static power consumption and high noise immunity. Consider the propagation delay variations across different supply voltages when timing constraints are critical. Ensure the operating temperature range of -55°C to +125°C matches the environmental requirements of the target system.

Latches Part Context

This part belongs to the LCX logic family, which is designed for low-voltage operation while maintaining compatibility with higher voltage interfaces. The MC74LCX573 series provides high performance through its flow-through pinout design, facilitating easier printed circuit board layout. It represents a standard solution for data latching in mixed-voltage digital environments.

Latches Replacement Considerations

Direct substitutes include the NLV74LCX573DTR2G, though it is discontinued and not recommended for new designs. Verify functional equivalence regarding pinout and electrical characteristics before replacing. Cross-reference with other manufacturers' octal latches only if they explicitly match the 5 V tolerance and 3-state output specifications.

Latches FAQ

How does the IOFF specification benefit the MC74LCX573?

The IOFF specification guarantees that the outputs remain in a high impedance state when VCC is 0 V, preventing back-powering of the device and protecting connected circuits during power-down conditions.

What is the maximum input voltage the MC74LCX573 can tolerate?

The MC74LCX573 inputs are 5 V tolerant, allowing them to be safely driven from 5.0 V devices without damage, even when the device itself is operating at lower supply voltages down to 1.65 V.