74ABT373CMTC

Overview

The onsemi 74ABT373CMTC is an octal transparent latch with 3-STATE outputs housed in a 20-Lead Thin Shrink Small Outline Package (TSSOP). It operates within a supply voltage range of +4.5V to +5.5V and supports an ambient temperature range of -40°C to +85°C. The device features eight D-type latches where data enters when the Latch Enable input is HIGH and stores data upon transition to LOW. Output buffers are controlled by an active LOW Output Enable input, providing high impedance states when disabled.

Feature Summary

• Provides 3-STATE outputs suitable for bus interfacing applications
• Features guaranteed output skew and simultaneous switching performance
• Ensures high-impedance, glitch-free bus loading during power transitions
• Supports nondestructive hot-insertion capability

Applications

• Bus organized system applications
• Data storage and transfer in digital logic circuits
• Interface between microprocessors and peripheral devices

Procurement Notes

Verify the specific package designation MTC20 corresponds to the required 20-Lead TSSOP footprint. Confirm that the operating voltage requirements align with the +4.5V to +5.5V specification. Ensure environmental conditions remain within the -40°C to +85°C operational range. Check for any specific lead-free or RoHS compliance documentation if required by assembly standards.

Selection Notes

Select this component for designs requiring octal latching with tri-state control in a compact surface-mount package. Consider the propagation delay characteristics under varying load conditions. Evaluate the power supply current specifications against system power budgets. Ensure compatibility with the logic family voltage levels for inputs and outputs.

Part Context

This device belongs to the ABT logic family, characterized by advanced BiCMOS technology offering high-speed operation. It is part of a series of octal latches designed for bus-oriented systems. The CMTC suffix specifically denotes the 20-Lead TSSOP package variant manufactured by Fairchild Semiconductor, now associated with onsemi.

Replacement Considerations

SN74ABT373DW

FAQ

How does the Latch Enable input affect data transparency?

When the Latch Enable input is HIGH, the flip-flops appear transparent to the data, meaning the output changes state as the input changes. When LOW, the data present at setup time preceding the transition is latched.

What controls the 3-STATE buffer mode?

The Output Enable input controls the buffer mode. When LOW, the buffers are in bi-state mode. When HIGH, the buffers enter a high impedance state, isolating the outputs from the bus.