MC74LCX573DTG

Latches Overview

The MC74LCX573DTG is a low-voltage CMOS octal transparent latch with 3-state outputs, manufactured by onsemi. It operates from a 1.65 V to 5.5 V supply and features 5 V-tolerant inputs and outputs for interface capability with 5.0 V TTL logic. 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 balanced 24 mA output drive at 3 V, and includes IOFF specifications for high impedance when VCC = 0 V.

Latches Feature Summary

• Features 5 V tolerant inputs and outputs allowing safe interfacing with 5.0 V devices
• Supports live insertion and withdrawal capabilities
• Provides balanced 24 mA sink and source output current capability
• Guarantees high impedance state during power-off conditions

Latches Applications

• Interface between 5.0 V TTL logic and lower voltage systems
• Octal data storage in memory architectures
• Bus-oriented memory register applications
• Clock drivers requiring buffered outputs

Latches Procurement Notes

Verify the DTG suffix indicates TSSOP-20 packaging before procurement. Confirm RoHS compliance and Pb-Free status as standard for this part number. Check for automotive -Q suffix requirements if specific site control changes are needed. Ensure ordering quantities match the rail or tape-and-reel shipping options provided in the manufacturer's documentation.

Latches Selection Notes

Select this component for designs 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 TSSOP-20 package for space-constrained surface mount layouts. Verify operating temperature range requirements against the specified -55°C to +125°C limits.

Latches Part Context

This device belongs to the LCX logic family, designed for low-voltage CMOS applications. It serves as a non-inverting octal transparent latch within the broader 74LCX series of integrated circuits. The product is intended for general-purpose digital logic applications requiring reliable data storage and bus driving capabilities.

Latches Replacement Considerations

Direct replacements include MC74LCX573DWG for SOIC-20 packaging. For tape-and-reel versions, MC74LCX573DTR2G is available. Automotive qualified variants include MC74LCX573DTR2G-Q. Verify pinout compatibility and electrical characteristics before substitution.

Latches FAQ

What is the function of the OE input?

The Output Enable (OE) input controls the 3-state outputs. When OE is LOW, outputs are enabled; when HIGH, they enter a high impedance state.

How does the LE input affect data storage?

When Latch Enable (LE) is HIGH, the latch is transparent and outputs follow inputs. When LE transitions from HIGH to LOW, the data present at the inputs is stored.

Is the device compatible with 5 V logic levels?

Yes, the MC74LCX573DTG has 5 V tolerant inputs and outputs, allowing it to interface safely with 5.0 V devices.