MC74LCX573DTR2G

Latches Overview

The MC74LCX573DTR2G is a low-voltage CMOS octal transparent latch manufactured by onsemi. It operates from a 2.0 V to 3.6 V supply and features 5.0 V tolerant inputs and outputs, allowing safe interfacing with 5.0 V devices. The device contains eight D-type latches with three-state standard outputs controlled by Latch Enable (LE) and Output Enable (OE) inputs. Key electrical parameters include a propagation delay of 1.5 ns at 3.3 V, balanced output sink and source capability of 24 mA, and near-zero static supply current of 10 µA. It supports live insertion and withdrawal and includes an IOFF specification for high impedance when VCC = 0 V.

Latches Feature Summary

• Features 5.0 V tolerant inputs and outputs for direct interface with 5.0 V TTL logic without level shifting.
• Provides balanced 24 mA output drive capability for improved switching noise performance.
• Supports live insertion and withdrawal with an IOFF specification ensuring high impedance during power-off states.
• Offers near-zero static supply current across all logic states to substantially reduce system power requirements.

Latches Applications

• Memory mapping applications requiring octal data storage
• Register banks in digital systems
• Bus-oriented architectures utilizing 3-state outputs
• Interface circuits between 2.5 V/3.3 V logic and 5.0 V peripherals

Latches Procurement Notes

Verify the package suffix 'DT' corresponds to the TSSOP-20 form factor required for your PCB layout. Confirm the 'G' suffix indicates a lead-free and RoHS-compliant manufacturing process. Ensure the tape-and-reel quantity matches your automated assembly equipment specifications. Cross-reference the manufacturer part number MC74LCX573DTR2G with official distributor catalogs to validate authenticity and revision status before procurement.

Latches Selection Notes

Select this component when designing systems operating between 2.0 V and 3.6 V that require compatibility with 5.0 V input signals. The TSSOP-20 package is suitable for space-constrained surface-mount designs. Consider the 24 mA drive strength if driving moderate capacitive loads or multiple inputs. Verify that the 1.5 ns propagation delay meets the timing constraints of your specific clock frequencies and data paths.

Latches Part Context

This device belongs to the onsemi 74LCX series of low-voltage CMOS logic components. The LCX family is characterized by its ability to operate at lower voltages while maintaining compatibility with legacy 5.0 V logic levels. The MC74LCX573 specifically implements an octal latch configuration, distinguishing it from flip-flops or buffers within the same logical family.

Latches Replacement Considerations

Publicly confirmed substitute part numbers include MC74LCX573DWG and MC74LCX573DTG. These variants share identical logical functionality but differ in packaging (SOIC-20 vs. TSSOP-20) or shipping format. Verify pinout compatibility and physical dimensions before substituting packages.