74LVQ573TTR

Latches Overview

The 74LVQ573TTR is a low voltage CMOS octal D-type latch with three-state non-inverting outputs, manufactured by STMicroelectronics. It utilizes sub-micron silicon gate and double-layer metal wiring C2MOS technology for low power and low noise performance in 3.3V applications. The device operates within a supply voltage range of 2V to 3.6V, featuring data retention at 1.2V. Key electrical characteristics include a typical propagation delay of 5.8 ns at VCC = 3.3V, a maximum quiescent supply current of 4 µA, and symmetrical output impedance with minimum drive currents of 12 mA. It supports 75Ω transmission line driving and guarantees PCI bus levels at 24 mA.

Latches Feature Summary

• Features three-state outputs controlled by separate Latch Enable (LE) and Output Enable (OE) inputs for flexible data management.
• Incorporates protection circuits against static discharge, providing 2kV ESD immunity and transient excess voltage tolerance.
• Offers pinout compatibility with the standard 74 series 573 while delivering improved latch-up immunity.
• Designed with balanced propagation delays and low noise characteristics suitable for high-speed digital systems.

Latches Applications

• Low power and low noise 3.3V logic applications
• PCI bus interface designs requiring guaranteed bus levels
• Transmission line driving with 75Ω impedance matching
• Octal register storage and buffering in high-speed digital circuits

Latches Procurement Notes

Verify the specific package type required, as the TTR suffix indicates Tape and Reel packaging in the TSSOP-20 format. Confirm that the application environment remains within the recommended operating temperature range of -55°C to +125°C. Ensure supply voltage stays between 2V and 3.6V to maintain functional truth table specifications. Check for any RoHS compliance requirements relevant to your manufacturing process.

Latches Selection Notes

Select this component when an octal latch with three-state outputs is needed for 3.3V systems. It serves as a drop-in replacement for standard 74LS573 or 74HC573 devices where lower power consumption and higher speed are priorities. Consider its 75Ω transmission line driving capability if interfacing with high-speed buses. Verify that the TSSOP-20 package fits the available PCB space compared to the SOIC-20 option.

Latches Part Context

This part belongs to the 74LVQ family of low voltage CMOS logic devices from STMicroelectronics. The LVQ series is designed to bridge the gap between older TTL-compatible logic and modern low-voltage standards. It provides enhanced performance over standard LVX or LVC families regarding drive strength and noise immunity, specifically targeting 3.3V applications that require robust signal integrity.

Latches Replacement Considerations

Direct pin-compatible replacements include other manufacturers' 74LVQ573 variants. For legacy upgrades, 74HC573 or 74LVC573 devices may be considered, though voltage ranges and drive strengths differ. Verify that any substitute maintains the three-state functionality and compatible input/output voltage thresholds for the target system.