SN74ALS996DW

Overview

The SN74ALS996DW is an octal D-type edge-triggered read-back latch manufactured by Texas Instruments in the ALS logic series. It features a bus-structured pinout and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides eight non-inverting outputs with 3-state capability, controlled by an output-enable (OE) input. Data is latched on the low-to-high clock transition when enable is low. The T/C input determines whether Q outputs present true or complementary data. The component is housed in a 24-pin Small-Outline (DW) package and supports operation from 0°C to 70°C.

Feature Summary

• Provides read-back capability to store input bus contents and return stored data onto the input data bus
• Features 3-state I/O-type read-back inputs for direct connection to system buses
• Allows polarity control of Q outputs via the T/C input for true or complementary data presentation

Applications

• Storing contents of input data buses
• Reading back stored data onto the input data bus
• Bus-structured interface designs requiring bidirectional data handling

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation, as the DW package status may vary between obsolete and active production states depending on the exact revision. Confirm RoHS compliance and lead finish specifications directly with the supplier. Ensure the procurement channel sources genuine Texas Instruments components to guarantee electrical characteristics match the datasheet limits.

Selection Notes

Select this component for applications requiring octal storage with simultaneous read-back functionality. The ALS series offers faster switching speeds compared to standard TTL equivalents. Verify that the system bus architecture aligns with the device's bus-structured pinout. Ensure the operating environment remains within the specified commercial temperature range of 0°C to 70°C.

Part Context

This part belongs to the SN74ALS996 family of octal latches. It is functionally similar to other ALS-series devices but specifically designed for read-back operations. The DW package variant is distinct from ceramic or DIP options like the JT or NT packages. It serves as a catalog product for general-purpose digital logic applications requiring high-speed bus interfacing.

Replacement Considerations

Check for the SN74ALS996DWR tape-and-reel variant if surface-mount volume packaging is required instead of tubes. Verify compatibility with SN54ALS996 variants only if military temperature ranges are necessary, noting the package differences.