SN74ALVC7814-25DL

FIFOs Memory Overview

The SN74ALVC7814-25DL is a low-power first-in, first-out memory device manufactured by Texas Instruments. It features an 18-bit data bus width and a storage capacity of 1.125 kbit (64 x 18). The component operates within a supply voltage range of 3 V to 3.6 V and supports asynchronous or coincident load and unload clocks. It provides fast access times of 18 ns with a 50-pF load and supports data rates up to 40 MHz. The device includes full, empty, half-full, and programmable almost-full/almost-empty status flags.

FIFOs Memory Feature Summary

• Supports independent write and read operations using separate load clock and unload clock inputs.
• Includes programmable offset values for the almost-full/almost-empty flag via program enable input.
• Features three-state outputs controlled by an output-enable signal.

FIFOs Memory Applications

• Buffering data between components operating at different clock domains
• Data rate matching in high-speed digital systems
• Temporary storage in communication interfaces

FIFOs Memory Procurement Notes

Verify that the specific ordering suffix matches the required speed grade and package type. Confirm RoHS compliance and moisture sensitivity level ratings before procurement. Ensure the selected variant aligns with the intended operating temperature range and supply voltage requirements for the target application.

FIFOs Memory Selection Notes

Select this component when an 18-bit wide FIFO buffer is required for low-voltage CMOS applications. Consider the 18 ns access time and 40 MHz maximum frequency for timing constraints. Verify compatibility with existing logic levels and ensure sufficient pin count for the SSOP-56 package fits the design layout.

FIFOs Memory Part Context

This part belongs to the SN74ALVC7814 family of low-power advanced CMOS FIFO memories. It is designed for 3-V to 3.6-V operation and offers pin-to-pin compatibility with other members of the Widebus family. The device utilizes shrink small-outline packaging to provide a compact footprint for dense circuit board designs.

FIFOs Memory Replacement Considerations

The datasheet indicates pin-to-pin compatibility with SN74ACT7804, SN74ACT7806, and SN74ACT7814. Verify voltage level compatibility as these counterparts may operate at different supply voltages compared to the ALVC series.

FIFOs Memory FAQ

How is the almost-full/almost-empty flag programmed?

The offset values are programmed after reset and before the first word is written. The program enable must be held low while the binary value on D0–D7 is latched during the rising edge of the load clock.

What happens to the data outputs when the output-enable is high?

When the output-enable signal is high, the Q outputs enter a high-impedance state, effectively disconnecting them from the bus.