74ABT373AD,118

Overview

The NXP USA Inc. 74ABT373AD,118 is an octal transparent latch featuring 3-State output buffers. It operates within a DC supply voltage range of 4.5V to 5.5V and supports an operating temperature range from -40°C to +85°C. The device provides high output drive capability with low-level output current up to 64mA and high-level output current up to -32mA. Propagation delay from data inputs (Dn) to outputs (Qn) ranges from 1.4ns to 4.7ns at VCC = 5.0V. Input capacitance is typically 4pF, and quiescent supply current is 250μA maximum.

Feature Summary

• Octal transparent latch design coupled with independent 3-State output buffers controlled by Enable and Output Enable gates.
• High-output drive capability designed for heavily loaded 3-State buses, MOS memories, or microprocessors.
• Power-up 3-State functionality ensures live insertion and extraction are permitted without bus contention.
• Robust protection features including latch-up resistance exceeding 500mA and ESD protection exceeding 2000V per MIL STD 883.

Applications

• Driving heavily loaded 3-State buses in digital systems
• Interface between logic circuits and MOS memories
• Connection to MOS microprocessors requiring high drive strength

Procurement Notes

Verify the specific package type against the ordering suffix 'D' (20-Pin plastic SO). Confirm that the component meets the required operating temperature range of -40°C to +85°C. Ensure compatibility with the 4.5V to 5.5V supply voltage specifications. Check for RoHS compliance status if required by project standards. Validate pin configuration matches the 20-SOIC footprint.

Selection Notes

Select this component when high-speed data latching with strong drive capability is required. The ABT series offers superior speed compared to standard TTL or CMOS equivalents. Consider the 3-State outputs for bus sharing applications. Verify power-up reset behavior aligns with system initialization requirements. Evaluate thermal performance under maximum load conditions.

Part Context

The 74ABT373A belongs to the high-performance BiCMOS 74ABT logic family. This family combines low static and dynamic power dissipation with high speed. The device is manufactured by Philips Semiconductors, now part of NXP. It serves as a standard octal latch solution for legacy and modern digital designs requiring robust signal integrity.

Replacement Considerations

Direct replacements include other 74ABT373 variants from NXP or Nexperia with identical electrical characteristics. Cross-reference with 74FCT373 or 74ACT373 devices if voltage levels differ. Ensure pinout compatibility when substituting with similar octal latches from other manufacturers.