74ACT373TTR

Latches Overview

The STMicroelectronics 74ACT373TTR is an octal D-type latch with three-state non-inverting outputs, fabricated using sub-micron silicon gate C2MOS technology. It operates within a supply voltage range of 4.5V to 5.5V and features high-speed performance with typical propagation delays of 6ns at VCC = 5V. The device provides symmetrical output impedance with minimum drive currents of 24mA for both high and low states. It includes protection circuits against static discharge, offering 2kV ESD immunity. The component is pin and function compatible with the standard 74 series 373.

Latches Feature Summary

• High-speed CMOS octal D-type latch with three-state outputs
• Compatible with TTL outputs and designed for direct interfacing with High Speed CMOS systems
• Equipped with protection circuits providing 2kV ESD immunity
• Balanced propagation delays and 50Ω transmission line driving capability

Latches Applications

• Bus organized system applications
• Interfacing High Speed CMOS systems with TTL and NMOS components
• Computer peripherals such as printers, scanners, and copiers

Latches Procurement Notes

Verify that the ordering code matches the TSSOP package variant (74ACT373TTR) to ensure correct physical dimensions and lead pitch. Confirm the operating temperature range requirements align with the specified -55°C to 125°C limits. Ensure power supply conditions strictly adhere to the recommended 4.5V to 5.5V range to maintain functional operation and prevent damage beyond absolute maximum ratings.

Latches Selection Notes

Select this component when bus-organized system applications require an octal latch with three-state control. It is suitable for designs needing direct interface between High Speed CMOS logic and TTL or NMOS components. The device offers improved latch-up immunity and balanced propagation delays, making it appropriate for high-speed data transfer scenarios where symmetrical output drive is necessary.

Latches Part Context

The 74ACT373TTR belongs to the 74ACT series of logic devices, which are high-speed CMOS equivalents of standard TTL logic functions. This specific model is an octal D-type latch, providing eight independent latches in a single package. The 'TTR' suffix indicates the TSSOP surface-mount package type with tape and reel packaging, distinguishing it from DIP or SOP variants within the same logical family.

Latches Replacement Considerations

The datasheet notes pin and function compatibility with the 74 series 373. Verify if generic 74ACT373 equivalents from other manufacturers meet the specific electrical characteristics, such as the 6ns typical propagation delay and 24mA output drive current, before substitution.