IS61NLF51236B-7.5TQLI-TR

Memory IC Overview

The IS61NLF51236B-7.5TQLI-TR is an 18Mb synchronous static RAM organized as 512K words by 36 bits. It features a flow-through architecture with no wait states between read and write operations. The device operates with a VDD supply of 3.3V (±5%) and supports VDDQ I/O levels of either 3.3V or 2.5V (±5%). Key electrical parameters include a maximum clock frequency of 117 MHz, a cycle time of 8.5 ns, and a clock access time of 7.5 ns. It utilizes a single positive-edge-triggered clock input for all synchronous operations.

Memory IC Feature Summary

• Eliminates wait cycles during bus transitions between read and write operations through a 'no wait' state feature.
• Supports individual byte write control via dedicated synchronous byte enable inputs for precise data management.
• Integrates JTAG boundary scan capabilities within the package to facilitate testing and verification processes.
• Provides flexible burst sequence selection using a MODE pin to configure either interleaved or linear addressing patterns.

Memory IC Applications

• Networking equipment requiring high-speed data buffering
• Communications systems utilizing synchronous memory interfaces
• Industrial applications demanding extended temperature range operation

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm voltage compatibility between VDD and VDDQ supplies before integration. Ensure ESD precautions are followed during handling due to CMOS technology sensitivity. Cross-reference the datasheet revision date to confirm current specifications.

Memory IC Selection Notes

Select this component when a 36-bit wide synchronous interface is required for high-throughput data paths. The 7.5 ns speed grade suits designs operating up to 117 MHz. Consider the 100-pin QFP package for standard surface-mount assembly needs. Evaluate power consumption requirements against the specified AC operating current limits.

Memory IC Part Context

This part belongs to the IS61NLF family of 18Mb synchronous SRAMs manufactured by ISSI. The family includes variants with different speeds and I/O voltages. The NLF designation specifically indicates 3.3V core logic with flexible 3.3V or 2.5V I/O options. It shares architectural similarities with NVF and NVVF series devices but differs in supply voltage requirements.

Memory IC Replacement Considerations

Direct substitutes within the same family include other speed grades of the IS61NLF51236B series. Verify pin compatibility if replacing with BGA packages from the same manufacturer. Check voltage tolerances carefully when substituting across different I/O voltage families.