Renesas 7005S15J

Overview

7005S15J from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 15 ns max read cycle time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbitration logic for concurrent access coordination in real-time systems such as military avionics data buffers.

For engineers reviewing the 7005S15J datasheet, 7005S15J pinout, 7005S15J application, or 7005S15J equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-level DC/AC electrical characteristics, and exact package mapping for the 64-pin TQFP variant.

Technical Context

The 7005S15J implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port-enabling simultaneous reads from identical memory locations without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion (output on Master, input on Slave) and supports semaphore signaling using A0–A2 to select among eight flags.

It features automatic power-down via CE control, battery backup capability (2 V data retention), and robust ESD tolerance (>2001 V). The device operates across commercial temperature range (0°C to +70°C) and is fabricated in high-performance CMOS technology with typical active power of 750 mW and standby power of 5 mW.

Key Specifications

Pinout & Package

64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant green packaging option available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C136-15VC and IS61LV5128-15KLI, the 7005S15J uniquely integrates full hardware arbitration, semaphore registers, and Master/Slave configuration in a compact 64-pin TQFP - delivering drop-in concurrency support without layout or firmware changes.

Availability

7005S15J is available at Aetrix Electronics and suitable for avionics data buffering, industrial PLC memory coherency, and military radar signal processing requiring stable component supply across extended production lifecycles.

Supply support for 7005S15J includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions, now part of Renesas Electronics.

The 7005S15J belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic real-time interprocessor communication in aerospace, defense, and industrial control systems demanding sub-20 ns latency and hardware-enforced memory coherency.

FAQ

What is the maximum operating frequency supported by the 7005S15J?

The 7005S15J has a 15 ns maximum read cycle time (tRC), supporting effective operation up to 66.7 MHz in systems where address and control setup/hold times are met. This assumes proper termination, clean power delivery, and adherence to AC timing parameters including tAA (15 ns max), tACE (15 ns max), and tAOE (10 ns max) under commercial temperature conditions.

Does the 7005S15J support battery backup operation, and what voltage is required?

Yes, the 7005S15J supports battery backup with guaranteed data retention down to 2.0 V (VDR), as specified in Table 9. At VCC = 2 V, typical data retention current (ICCDR) is 100 µA, enabling multi-year retention on small coin-cell batteries in unpowered systems like flight data recorders.

How does the M/S pin affect BUSY signal behavior in the 7005S15J?

When M/S = HIGH, the 7005S15J operates as a Master: BUSYL and BUSYR are push-pull outputs that assert LOW during port contention. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven LOW by an external Master to inhibit writes - enabling hierarchical arbitration in multi-device configurations.

Can the 7005S15J perform simultaneous read operations from both ports to the same memory address?

Yes, the 7005S15J implements true dual-port memory cells that allow concurrent reads from identical addresses on left and right ports without conflict, delay, or data corruption - a core architectural feature confirmed in the Functional Block Diagram and Truth Table I.

What package type is used for the 7005S15J, and are there thermal or mounting considerations?

The 7005S15J uses a 64-pin thin quad flatpack (TQFP) with dimensions 14 mm × 14 mm × 1.4 mm and 0.5 mm lead pitch. It requires standard reflow profiles for fine-pitch QFPs; thermal vias under the exposed pad (if present) are recommended for sustained high-current operation, though typical active power is only 750 mW.