7142SA20J8

Overview

The Renesas Electronics Corporation 7142SA20J8 is a high-speed, asynchronous dual-port static random-access memory (SRAM) IC. It features a storage capacity of 16Kb organized as 2K x 8 bits. The device supports parallel interface access with a maximum access time and write cycle time of 20 ns. It operates on a single 5V power supply within the range of 4.5V to 5.5V. The component is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package with dimensions of 19.13x19.13 mm. It is designed for surface mount installation and functions within an ambient temperature range of 0°C to 70°C.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by both ports without conflict.
• Asynchronous operation allows flexible timing integration into various system designs without requiring external clock synchronization logic.
• Automatic power-down feature controlled by chip enable inputs, allowing the internal circuitry to enter a low standby power mode when inactive.

Applications

• High-speed data buffering in communication systems
• Cache memory implementation in embedded processors
• Data logging applications requiring fast write speeds

Procurement Notes

Verify component authenticity through authorized channels due to potential availability from third-party sources. Confirm that the specific suffix J8 corresponds to the required lead-free or packaging specifications if critical for your assembly process. Check current lifecycle status as this series may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints for the 52-PLCC package before procurement.

Selection Notes

Select this component when a system requires true dual-port capability for concurrent master-slave memory operations. It is suitable for applications needing 16Kb capacity with 20 ns speed performance. Consider the PLCC-52 package constraints and 5V logic compatibility. Evaluate thermal requirements against the 0°C to 70°C operating range. Compare against other members of the 7142 family if different access times or capacities are needed.

Part Context

This part belongs to the Renesas 7142 series of dual-port SRAMs, originally developed by Integrated Device Technology (IDT) and later acquired by Renesas. These devices are commonly used as slave memories in wider word-width systems paired with master dual-port RAMs. The series is known for TTL-compatible inputs and battery backup capabilities in certain variants.

Replacement Considerations

Direct substitutes include IDT7142SA20J8. Other compatible parts in the series include 7142SA55J8 for slower access needs or 7142LA20J8 for industrial temperature ranges. Verify pinout and electrical specifications match exactly before substitution.