SN74LS373NS

Latches Overview

The SN74LS373NS is an octal D-type transparent latch manufactured by Texas Instruments, featuring three-state outputs. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a commercial temperature range of 0°C to 70°C. The device utilizes a 20-pin Small Outline Package (SOP). Key electrical characteristics include a typical propagation delay of 18 ns from data input to output at 5 V, with a maximum clock frequency of 50 MHz under specified load conditions.

Latches Feature Summary

• Transparent latching behavior where outputs follow inputs during the enable high state
• Three-state bus-driving outputs for direct connection to system buses
• Buffered control inputs to reduce DC loading on data lines

Latches Applications

• Implementing buffer registers in digital systems
• Creating I/O ports for microcontroller interfaces
• Functioning as bidirectional bus drivers
• Serving as working registers in data processing circuits

Latches Procurement Notes

Verify the specific ordering suffix 'NS' corresponds to the SOP-20 package configuration required for your PCB layout. Confirm that the component meets the necessary RoHS compliance standards for your manufacturing process. Ensure the supplier provides valid traceability documentation consistent with Texas Instruments production data.

Latches Selection Notes

Select this component when designing systems requiring parallel data storage with bus-compatible outputs. The LS logic family offers a balance of speed and power consumption suitable for general-purpose digital applications. Consider the 20-pin SOP footprint constraints and thermal requirements during the initial schematic capture phase.

Latches Part Context

This part belongs to the SN54/74LS series of octal D-type transparent latches. It shares functional similarities with the SN74LS374, which uses edge-triggered flip-flops instead of transparent latches. Both devices provide three-state outputs but differ in their triggering mechanisms and timing specifications.

Latches Replacement Considerations

SN74LS373N (PDIP-20)

Latches FAQ

How does the enable input affect the latch operation?

When the enable (C) input is high, the Q outputs are transparent and follow the D inputs. When the enable goes low, the output data is latched at the level present at the inputs.

What is the function of the OC pin?

The Output Control (OC) pin places the eight outputs into a high-impedance state when driven high, effectively disconnecting them from the bus without affecting the internal latch data.