IS61QDPB42M36A-400M3LI

Memory IC Overview

The IS61QDPB42M36A-400M3LI is a 72 Mbit Synchronous Static Random Access Memory (SRAM) manufactured by ISSI. It features a memory organization of 2 Megawords by 36 bits and supports a maximum clock frequency of 400 MHz. The device utilizes a QUADP interface with a fixed burst length of four and operates with a 2.5 cycle read latency. It is housed in a 165-ball Lead-Free Low Profile Fine-Pitch Ball Grid Array (LFBGA) package measuring 15x17 mm.

Memory IC Feature Summary

• Supports concurrent independent read and write operations via separate ports
• Integrates an on-chip Delay-Locked Loop for wide data valid windows
• Features a synchronous pipeline read architecture with late write capability

Memory IC Applications

• High-speed networking equipment requiring low-latency buffering
• Telecommunications infrastructure systems
• Industrial automation control units
• Test and measurement instrumentation

Memory IC Procurement Notes

Verify the specific suffix 'M3LI' to confirm the lead-free status and RoHS compliance requirements for your assembly process. Ensure the design accommodates the 165-ball LFBGA footprint dimensions of 15x17 mm. Confirm that the system power supply meets the voltage specifications required for stable operation at the target 400 MHz clock speed.

Memory IC Selection Notes

Select this component when a high-density 72 Mbit configuration is required alongside a 36-bit data width. It is suitable for designs needing a 400 MHz operating frequency with a fixed four-word burst access pattern. Consider this part over standard DDR variants if the application demands a 2.5 cycle read latency profile rather than a 2.0 cycle alternative.

Memory IC Part Context

This device belongs to the IS61QDPB42M36A family of Quad/QuadP Synchronous SRAMs from ISSI. These components are engineered for applications demanding high throughput and deterministic timing. The family offers various speed grades, with this specific model optimized for 400 MHz performance within the 165-ball FBGA form factor.

Memory IC Replacement Considerations

The IS61QDPB42M36A-400M3LI may be functionally replaced by other speed grades within the same family, such as the IS61QDPB42M36A-450M3LI, provided the system clock can support the higher frequency. Verify pinout compatibility before substitution.