74ALVCH16821DL,512

Overview

The 74ALVCH16821DL,512 is a 20-bit bus-interface D-type flip-flop manufactured by Nexperia USA Inc. It features positive-edge triggering and 3-state outputs housed in a 56-BSSOP package. The device operates within a supply voltage range of 2.3 V to 2.7 V or 3 V to 3.6 V. Key electrical parameters include a maximum propagation delay of 4.5 ns at 3.3 V with 50 pF load, output currents of 24 mA for both high and low states, and a static current of 40 µA. It supports a clock frequency of 350 MHz and functions across an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates two independent 10-bit registers with positive-edge triggering for efficient data storage.
• Provides 3-state outputs to facilitate direct connection to bidirectional data buses.
• Ensures high-speed performance suitable for demanding bus interface applications.

Applications

• High-speed data acquisition systems requiring parallel input registration.
• Memory buffer interfaces in embedded computing architectures.
• Communication protocol gateways managing multi-bit signal transfers.

Procurement Notes

Verify component authenticity through authorized Nexperia channels due to end-of-life status. Confirm that the 56-BSSOP package dimensions align with existing PCB footprints. Ensure power supply rails strictly adhere to specified voltage ranges to prevent operational failure. Validate thermal management requirements against the defined operating temperature limits during system integration.

Selection Notes

Select this component when designing systems requiring 20-bit parallel data latching with minimal propagation delay. Consider the 3-state output capability for bus sharing scenarios. Evaluate the trade-off between speed and power consumption relative to the 40 µA static current. Ensure compatibility with the target logic family voltage levels before finalizing the design choice.

Part Context

This part belongs to the 74ALVCH series, representing high-performance BiCMOS technology optimized for 2.5 V and 3.3 V operations. It serves as a specialized solution for bus-interface applications where speed and drive strength are critical. The DL suffix indicates the specific SSOP-56 packaging configuration used for surface-mount assembly.

Replacement Considerations

The SN74ALVCH16821DL from Texas Instruments is a confirmed substitute part number. Verify pinout compatibility and electrical specifications before implementation.