SN74AS373N3

Overview

The SN74AS373N is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 125 MHz. The device features bipolar inputs that reduce DC loading on data lines, alongside buffered control inputs for efficient bus driving. Designed for highly capacitive or low-impedance loads, it provides full parallel access for loading and utilizes pnp input structures to minimize signal line loading.

Feature Summary

• Features three-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads without requiring interface components.
• Incorporates pnp inputs to significantly reduce DC loading on data lines while maintaining buffered control inputs.
• Provides full parallel access capabilities for loading data into the eight latches simultaneously.

Applications

• Implementing buffer registers in digital systems
• Serving as I/O ports for peripheral interfacing
• Functioning as bidirectional bus drivers
• Operating as working registers in data processing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Package Option Addendum to confirm the exact package type, such as PDIP (N), SOIC (DW), or SOP (NS). Confirm the operating temperature range aligns with system requirements, as catalog versions typically support 0°C to 70°C. Ensure the lead finish and moisture sensitivity level match the assembly process specifications before finalizing procurement orders.

Selection Notes

Select this component when high-speed operation up to 125 MHz is required alongside strong drive capabilities for low-impedance buses. The AS series offers faster propagation delays compared to standard LS or ALS variants. Consider the 3-state output functionality if bus sharing is necessary, allowing the device to isolate its outputs effectively when disabled.

Part Context

This part belongs to the SN54/74AS family of octal transparent D-type latches with 3-state outputs. It shares functional similarities with the SN74ALS373A but offers higher speed performance. The device integrates eight independent latches into a single package, providing a compact solution for managing multiple data lines in synchronous digital designs.

Replacement Considerations

SN74ALS373N: Offers similar functionality with lower power consumption but reduced speed. SN74LS373N: Provides basic latch functionality at slower speeds with lower drive strength. SN74F373N: Features comparable speed characteristics but utilizes different internal technology.