SN74BCT373N

Overview

The SN74BCT373N is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It utilizes state-of-the-art BiCMOS design to significantly reduce quiescent current. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating free-air temperature range of 0°C to 70°C. It features eight latches where Q outputs follow D inputs while the latch-enable (LE) input is high, and latches data when LE goes low. A buffered output-enable (OE) input controls the high-impedance state.

Feature Summary

• Transparent D-type latching mechanism allows parallel access for loading applications
• BiCMOS technology design reduces internal power consumption
• Buffered output-enable input manages high-impedance bus isolation
• Designed for driving highly capacitive or low-impedance loads

Applications

• Implementing buffer registers
• I/O port implementation
• Bidirectional bus drivers
• Working registers in memory address systems

Procurement Notes

Verify the specific package type matches the required PCB footprint, as the SN74BCT373 series includes SOIC and SSOP variants alongside the PDIP-N package. Confirm the temperature grade corresponds to the application environment, as industrial grades differ from commercial ranges. Ensure OE pin handling during power-up aligns with system requirements to prevent unintended bus contention.

Selection Notes

Select this component when designing systems requiring octal data storage with tri-state bus interfacing capabilities. The BiCMOS architecture offers lower power consumption compared to standard TTL equivalents. Consider the propagation delay characteristics relative to system clock speeds. Verify that the 3-state output drive strength meets the load requirements of the connected bus lines.

Part Context

This part belongs to the SN54/74BCT373 family of octal transparent D-type latches with 3-state outputs. The BCT series combines BiCMOS density with CMOS compatibility. The 'N' suffix specifically denotes the Plastic Dual In-Line Package (PDIP) variant intended for through-hole mounting. This family serves as a bridge between legacy logic standards and modern low-power requirements.

Replacement Considerations

SN74ACT373N