71V3556S133PFG

Overview

The Renesas Electronics Corporation 71V3556S133PFG is a 4.5 Mbit Static Random Access Memory (SRAM) organized as 128K x 36. It operates with a maximum clock frequency of 133 MHz and features an access time of 4.2 ns. The device utilizes a parallel interface and requires a power supply voltage ranging from 3.135 V to 3.465 V, with a maximum operating current of 310 mA. It supports a commercial temperature range from -40°C to +85°C and is housed in a 100-pin TQFP package.

Feature Summary

• Zero Bus Turnaround (ZBT) technology eliminates dead cycles between read and write operations
• Fully pipelined architecture with internal synchronized output buffer enable
• Supports four-word burst capability for interleaved or linear access patterns
• Includes individual byte write control for precise data management

Applications

• High-performance system speed applications requiring fast data turnaround
• Embedded systems utilizing synchronous pipelined memory structures
• Industrial equipment operating within specified temperature grades

Procurement Notes

This component is officially classified as obsolete by the manufacturer. Production has ceased, and it is no longer available through standard distribution channels. Verification of authenticity is critical when sourcing remaining stock from third-party suppliers. Buyers must confirm the specific lot date code and physical condition prior to acquisition, as availability is limited to existing inventory only.

Selection Notes

Engineers should evaluate alternative components due to the discontinued status of this part. The selection process must account for the unavailability of new manufacturing runs. Designers should verify pin compatibility and electrical specifications against potential replacement devices to ensure seamless integration into existing circuit architectures without requiring significant redesign efforts.

Part Context

The 71V3556 series represents Renesas' Zero Bus Turnaround SRAM family, designed to optimize bus efficiency in high-speed digital systems. This specific model integrates 4.5 Mbits of storage capacity within a compact surface-mount package. It serves as a legacy solution for applications previously demanding low-latency memory access and robust data integrity in industrial and commercial environments.

Replacement Considerations

Publicly confirmed substitute part numbers include IDT71V2546S100PFG. Engineers should verify functional equivalence regarding interface protocols and timing parameters before implementation.