74HC40105DB,118

FIFOs Memory Overview

The Nexperia 74HC40105DB,118 is a 4-bit x 16-word asynchronous FIFO elastic storage register housed in an SSOP16 package. It supports independent shift-in and shift-out operations at different rates, making it suitable for buffering between asynchronous systems. The device operates on a supply voltage range of 2.0 V to 6.0 V. Key electrical parameters include a propagation delay from SO to Qn of up to 102 ns at 6.0 V, and a maximum frequency of 36 MHz at 6.0 V using flags or burst mode. It features three-state outputs, master-reset capability, and status indicators (DIR and DOR).

FIFOs Memory Feature Summary

• Asynchronous data handling with independent shift-in and shift-out control inputs.
• Built-in status flag outputs indicating data-in-ready and data-out-ready states.
• Three-state outputs allowing direct connection to bus lines.
• Expandable memory configuration through cascading or reducing word length.

FIFOs Memory Applications

• Buffering between asynchronous systems with different clock rates.
• Data rate conversion interfaces.
• Temporary storage in digital signal processing chains.

FIFOs Memory Procurement Notes

Verify the ordering suffix '118' corresponds to the SSOP16 package variant as specified in the official datasheet. Confirm that the application environment remains within the recommended operating conditions, specifically the supply voltage limits and temperature range of -40 °C to +125 °C. Ensure input signals respect the absolute maximum ratings to prevent damage from overvoltage or excessive current.

FIFOs Memory Selection Notes

Select this component when an asynchronous FIFO buffer is required for 4-bit wide data paths. The HC logic family offers compatibility with standard CMOS levels across a wide voltage range. Consider the SSOP16 package if space constraints favor shrink small outline packages over standard SO16 or TSSOP16 alternatives. Verify timing requirements against the dynamic characteristics tables for the specific supply voltage in use.

FIFOs Memory Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices manufactured by Nexperia. The 74HC40105 is specifically designed as an elastic storage register, distinct from counters or multiplexers in the same family. It provides a solution for managing data flow disparities in digital circuits without requiring complex handshaking protocols beyond the provided status flags.

FIFOs Memory Replacement Considerations

The 74HC40105D (SO16 package) and 74HC40105PW (TSSOP16 package) are functionally equivalent variants within the same product line. Substitution requires verifying package footprint compatibility and ensuring the replacement part meets the same electrical specifications and temperature ranges.