SN74BCT573N

Overview

The SN74BCT573N is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the BCT logic series. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a low-level output current of 64 mA and a high-level output current of -15 mA. Propagation delay is specified at 9.1 ns. Static current consumption is 4 uA. It supports through-hole mounting in a PDIP-20 package and functions across a temperature range of 0 °C to +70 °C.

Feature Summary

• Octal transparent D-type latch architecture with three-state outputs for bus driving applications
• High drive capability designed for low impedance or high capacitive loads
• TTL-compatible input thresholds ensuring compatibility with standard logic families

Applications

• Buffer registers and I/O port interfacing
• Bus-oriented architectures requiring data latching
• Working registers in digital control systems

Procurement Notes

Verify the specific suffix 'N' corresponds to the PDIP-20 through-hole package configuration. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the operating environment remains within the 0 °C to +70 °C commercial temperature range specified for this variant. Cross-reference the datasheet for exact pinout assignments relative to the package type.

Selection Notes

Select this component when TTL-compatible inputs are required alongside high drive strength for bus applications. The BCT series offers BiCMOS performance characteristics suitable for 5 V systems. Consider the PDIP-20 package constraints for PCB layout if through-hole assembly is mandated. Evaluate propagation delay specifications against system timing requirements.

Part Context

This part belongs to the SN74BCT family of BiCMOS logic devices from Texas Instruments. It serves as a latch variant within the broader 74-series logic ecosystem. The BCT technology combines CMOS low power with bipolar drive strength. It complements other octal latches like the SN74ACT573 but utilizes different input threshold characteristics.

Replacement Considerations

SN74ACT573N: Offers similar functionality but with ACT series electrical characteristics and potentially wider temperature ranges. Verify input threshold compatibility and package availability.