Renesas 7005L25J

Overview

IDT7005L25J from Integrated Device Technology (IDT) is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 25 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and integrated semaphore/arbitration logic - used in real-time inter-processor communication systems such as industrial PLCs and military avionics data buffers.

For engineers reviewing the IDT7005L25J datasheet, IDT7005L25J pinout, IDT7005L25J application, or IDT7005L25J equivalent, key selection considerations include its 25 ns access timing, master/slave BUSY arbitration, on-chip semaphore flag support, battery-backed 2V data retention, and 64-pin TQFP package compatibility with legacy dual-port memory designs.

Technical Context

The IDT7005L25J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses for left (L) and right (R) ports, enabling simultaneous reads to the same memory location without contention. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion and M/S-selectable master/slave configuration.

It supports two distinct operational modes: RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), with dedicated INTL/INTR interrupt flags and eight semaphore bits addressed by A0–A2. The device uses CMOS process technology and features automatic power-down when CE is deasserted.

Key Specifications

Pinout & Package

Package: 64-pin TQFP (PNG64), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AXC and R1EX24064ASAS-25, the IDT7005L25J uniquely delivers industrial temperature operation, integrated semaphore registers, and master/slave expansion in the same 64-pin TQFP footprint - making it irreplaceable for deterministic real-time embedded systems requiring hardware-enforced concurrency control.

Availability

IDT7005L25J is available at Aetrix Electronics and suitable for industrial PLCs, military avionics subsystems, and telecom line card designs requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7005L25J 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning solutions before its acquisition by Renesas Electronics in 2019.

The IDT7005L25J belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems demanding hardware arbitration and low-latency memory sharing.

FAQ

What is the maximum operating speed of the IDT7005L25J?

The IDT7005L25J has a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical maximum sustained read rate of 40 MHz per port. This timing is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, making it suitable for high-throughput real-time data exchange applications where deterministic latency is critical. The IDT7005L25J achieves this performance using optimized CMOS circuit design and on-die termination matching.

Does the IDT7005L25J support battery backup operation?

Yes, the IDT7005L25J supports battery backup operation with guaranteed data retention at VCC = 2.0 V, drawing ≤100 µA typical current (ICCDR) in retention mode. This feature allows the device to preserve memory contents during main power loss - essential for applications like industrial controllers or medical devices that must maintain state integrity after unexpected shutdown. The IDT7005L25J retains data across the full industrial temperature range without requiring external circuitry.

How does the BUSY arbitration logic work on the IDT7005L25J?

The IDT7005L25J implements hardware-based BUSY arbitration using dedicated BUSYL and BUSYR signals controlled by the M/S pin. When configured as master (M/S = H), BUSY outputs assert to block conflicting writes; when slave (M/S = L), BUSY inputs accept external arbitration signals. The logic detects address matches and enforces priority based on input stability timing (tAPS = 5 ns minimum), ensuring deterministic resolution without software intervention. This behavior is intrinsic to the IDT7005L25J silicon design and requires no external components.

Can the IDT7005L25J be used in a 16-bit data system?

Yes, the IDT7005L25J supports 16-bit or wider data systems via master/slave cascading. By connecting multiple IDT7005L25J devices with M/S pins configured appropriately and using the built-in semaphore logic, designers can construct wider memory words without external address decoding or control logic. The IDT7005L25J's pin-compatible architecture and shared BUSY/INT signaling simplify synchronization across devices - a capability explicitly documented in the IDT7005L25J functional description and timing diagrams.

What package type is used for the IDT7005L25J?

The IDT7005L25J is packaged in a 64-pin thin quad flatpack (TQFP), designated PNG64, with dimensions of 14 mm × 14 mm × 1.4 mm and 0.5 mm lead pitch. This RoHS-compliant surface-mount package is optimized for automated assembly and thermal performance in high-density PCB layouts. The IDT7005L25J's pinout matches industry-standard dual-port memory footprints, enabling drop-in replacement in existing designs using compatible 64-pin TQFP layouts.