7025S55JI

Memory IC Overview

The Renesas Electronics Corporation 7025S55JI is a high-speed, asynchronous dual-port static random access memory (SRAM) device. It provides a storage capacity of 128 kbit organized as 8K words by 16 bits. The component features a parallel interface with a maximum access time of 55 ns. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The device supports simultaneous independent reads and writes from two separate ports. It is housed in an 84-pin Plastic Leadless Chip Carrier (PLCC) package designed for surface mount technology. The industrial temperature range extends from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent read and write operations from two distinct ports without conflict.
• Integrated hardware support for semaphore signaling, allowing efficient synchronization and data exchange between the two ports.
• Automatic power-down functionality controlled by chip enable signals, reducing standby power consumption when not actively accessed.
• TTL-compatible inputs and outputs facilitating direct interfacing with standard logic families using a single 5V supply.

Memory IC Applications

• Stand-alone 128K-bit dual-port RAM systems requiring high-speed data buffering.
• Master/slave dual-port configurations for expanding data bus widths to 32 bits or more in complex computing architectures.
• Industrial control systems operating within the specified industrial temperature range requiring reliable volatile memory storage.

Memory IC Procurement Notes

Verify current availability status as this component may be discontinued or subject to limited production runs. Confirm RoHS compliance requirements against specific project standards, noting that older variants may not meet current environmental directives. Ensure proper handling procedures are followed due to moisture sensitivity classification. Validate pin compatibility with existing PCB footprints before procurement. Check for official end-of-life notifications to plan for long-term supply chain stability.

Memory IC Selection Notes

Select this component when true dual-port independence is required for concurrent data access without arbitration delays. Consider the 55 ns access speed suitable for moderate-frequency asynchronous interfaces. Evaluate the PLCC-84 package constraints regarding board space and thermal dissipation. Compare against faster variants if system timing budgets require sub-50 ns performance. Assess power management needs against the automatic power-down capabilities provided by the CE pins.

Memory IC Part Context

This part belongs to the Renesas 7025 series of dual-port SRAMs, which offers various speed grades and package options. The 'S' suffix typically denotes surface mount packaging, while 'J' indicates the PLCC form factor. The 'I' suffix specifies the industrial temperature range extension. This series is designed to replace legacy dual-port memories in applications requiring high bandwidth and low latency communication between processors.

Memory IC Replacement Considerations

• IDT7025S55JI