71V3556SA100BGI8

Overview

The IDT71V3556SA100BGI8 is a synchronous Single Data Rate Zero Bus Turnaround (ZBT) Static Random Access Memory manufactured by Renesas Electronics. It features a storage capacity of 4.5 Mbit organized as 128K x 36 bits. The device operates with a maximum clock frequency of 100 MHz and an access time of 5 ns. It utilizes a parallel interface and requires a supply voltage between 3.135 V and 3.465 V. The component is housed in a 119-pin Plastic Ball Grid Array (PBGA) package measuring 14x22 mm, designed for surface mount installation.

Feature Summary

• Zero Bus Turnaround technology eliminates dead cycles during bus turnaround between read and write operations.
• Internally synchronized output buffer enable removes the requirement for external Output Enable control.
• Positive clock-edge triggered registers for address, data, and control signals support fully pipelined applications.
• Four-word burst capability allows for interleaved or linear data transfer sequences.

Applications

• High-performance processor secondary cache systems
• Network infrastructure equipment requiring low-latency memory
• Industrial automation controllers
• Telecommunications base station hardware

Procurement Notes

Verify RoHS compliance status carefully, as specific listings indicate non-compliance with current environmental directives. Confirm the exact package variant matches the design footprint, as suffixes denote physical differences. Check manufacturing lifecycle status, as this part may be obsolete or subject to production changes. Ensure the supplier provides valid traceability documentation for quality assurance purposes before finalizing acquisition.

Selection Notes

Select this component when system architecture demands synchronous memory with zero wait states for bidirectional data transfers. The 36-bit width suits applications requiring wide data buses without complex multiplexing. Verify that the 100 MHz speed grade aligns with the host processor's clock domain. Consider the 119-pin BGA package constraints regarding PCB layout density and thermal dissipation requirements for the specific enclosure design.

Part Context

This device belongs to the 71V3556 family of ZBT Synchronous SRAMs, which are engineered to optimize system throughput by removing traditional bus turnaround delays. The family supports various speed grades and package options to accommodate different performance and form factor needs within embedded computing and networking environments.

Replacement Considerations

Consult official manufacturer substitution guides for verified equivalents. Cross-reference pinouts and electrical specifications strictly to ensure compatibility. Generic asynchronous or different synchronous SRAM types are not direct replacements due to architectural differences in control signaling and timing.