SN74ACT7811-15PN

FIFOs Memory Overview

The SN74ACT7811-15PN is a 1024 x 18-bit clocked first-in, first-out memory device manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 40 MHz with an access time of 15 ns under a 50-pF load. The component features independent asynchronous inputs and outputs, allowing read and write operations to be synchronized to separate system clocks. It includes programmable almost-full/almost-empty flags, input-ready, output-ready, and half-full status indicators. The device is housed in an 80-pin Thin Quad Flat (PN) package.

FIFOs Memory Feature Summary

• Supports independent read and write synchronization via separate clock inputs for flexible system integration.
• Features programmable almost-full/almost-empty flag boundaries defined during the reset cycle.
• Provides comprehensive status monitoring through input-ready, output-ready, and half-full flags.
• Capable of cascading expansion in both word width and word depth.

FIFOs Memory Applications

• High-speed data buffering between asynchronous systems
• Data rate matching in communication interfaces
• Temporary storage in digital signal processing chains

FIFOs Memory Procurement Notes

Verify the specific suffix PN confirms the 80-pin Thin Quad Flat package configuration. Confirm the -15 speed grade corresponds to the required 15 ns access time specification. Check current production status as this part may be obsolete or restricted. Ensure RoHS compliance requirements match the manufacturing date code. Validate that the operating temperature range meets the application environment constraints.

FIFOs Memory Selection Notes

Select this component when a wide 18-bit data path is required alongside deep 1024-word storage capacity. The ACT logic family provides high-speed performance suitable for demanding timing applications. Independent clock domains allow seamless interfacing between disparate system speeds. Consider the 80-pin package footprint for PCB layout compatibility. Evaluate power dissipation characteristics against available thermal management solutions.

FIFOs Memory Part Context

This device belongs to the Widebus family of FIFO memories designed for high-performance parallel data handling. It shares functional compatibility with other members like the SN74ACT7881 series, facilitating design reuse across different bus widths. The SN74ACT7811 specifically addresses applications requiring large buffer depths with wide data paths without complex external control logic.

FIFOs Memory Replacement Considerations

Pin-to-pin compatible alternatives include the SN74ACT7881, SN74ACT7882, and SN74ACT7884. Verify that substitute parts maintain the same 18-bit width and 1024-word depth specifications. Ensure replacement devices support the required 40 MHz clock frequency and 15 ns access time. Confirm package compatibility if using the 80-pin Thin Quad Flat form factor.