IS42S16400D-7BLI

Memory IC Overview

The IS42S16400D is a 64Mb Synchronous DRAM organized as 4M x 16 with four internal banks. It supports clock frequencies of 143 MHz and 166 MHz, featuring an LVTTL interface and a single 3.3V power supply. The device utilizes a pipeline architecture for high-speed data transfer, with inputs and outputs referenced to the rising edge of the clock. Available in 54-pin TSOP II and 60-ball FBGA packages, it includes programmable burst lengths, CAS latencies, and self-refresh modes.

Memory IC Feature Summary

• Fully synchronous operation with all signals referenced to the positive clock edge
• Quad-bank architecture enabling row access hiding and interleaving for improved performance
• Programmable burst lengths including sequential and interleave sequences
• Supports auto refresh, self-refresh, and power-down modes for power management

Memory IC Applications

• High-speed data buffering in computer systems
• Graphics memory applications requiring fast random access
• Industrial control systems operating within specified temperature ranges
• Network communication equipment utilizing standard SDRAM interfaces

Memory IC Procurement Notes

Verify the specific package variant required, as the part number covers both 54-pin TSOP II and 60-ball FBGA options. Confirm the target clock frequency compatibility (143 MHz or 166 MHz) with the system design. Ensure the voltage levels match the 3.3V requirement and check for lead-free packaging availability if mandated by environmental regulations.

Memory IC Selection Notes

Select this component when a 64Mb density with a 16-bit width is necessary for synchronous memory applications. Consider the quad-bank structure if concurrent operations are needed to hide precharge times. Evaluate the package constraints against the PCB layout, choosing between TSOP II or FBGA based on space and thermal requirements.

Memory IC Part Context

This device belongs to ISSI's 64Mb SDRAM family, designed for general-purpose high-speed memory applications. It shares architectural similarities with other parts in the series but is distinct in its specific organization and interface timing characteristics. The product line emphasizes reliability and long-term availability for industrial and commercial markets.

Memory IC Replacement Considerations

Direct substitutes must maintain the 64Mb capacity, 16-bit width, and compatible pinout. Verify that alternative components support the same LVTTL interface and voltage levels. Check for equivalent package dimensions if physical replacement is required without board redesign.