Renesas 7007L25JI8

Overview

IDT7007L25JI8 from IDT (now Renesas) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum access time, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply - used in real-time inter-processor communication, shared memory systems, and embedded arbitration logic.

For engineers reviewing the IDT7007L25JI8 datasheet, IDT7007L25JI8 pinout, IDT7007L25JI8 application, or IDT7007L25JI8 equivalent, key selection considerations include BUSY/INT semaphore timing, master/slave arbitration behavior, dual-port contention resolution, and PLCC-68 package compatibility with legacy board layouts.

Technical Context

The IDT7007L25JI8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves simultaneous access via BUSY flag assertion (push-pull output) and supports both CE-controlled and address-match-based arbitration modes.

It integrates full hardware semaphore signaling across eight flags (addressed by A0–A2), interrupt generation at fixed addresses (7FFE_H/7FFF_H), and automatic power-down per port when CE is high - enabling low-power standby states with typical ISB3 = 0.2 mA (full CMOS-level standby).

Key Specifications

Pinout & Package

Package: 68-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 24.1 mm × 24.1 mm × 4.3 mm, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and AS7C33256P-25JC, the IDT7007L25JI8 uniquely delivers integrated hardware arbitration, semaphore, and interrupt functions in a field-serviceable PLCC package - reducing total system component count and validation effort for safety-certified designs.

Availability

IDT7007L25JI8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data concentrators, and medical imaging subsystems requiring stable component supply, long-lifecycle support, and drop-in replacement capability for legacy IDT dual-port designs.

Supply support for IDT7007L25JI8 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

Renesas Electronics acquired Integrated Device Technology (IDT) in 2019, inheriting its high-performance memory and interface portfolio. IDT was renowned for innovation in timing, RF, and intelligent power solutions.

The IDT7007L25JI8 belongs to IDT's legacy dual-port SRAM family, engineered specifically for deterministic inter-processor communication in real-time embedded systems where hardware-enforced arbitration and low-latency shared memory are mandatory.

FAQ

What is the operating temperature range for the IDT7007L25JI8?

The IDT7007L25JI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings and DC Operating Conditions tables of the official datasheet (DSC 2940/16, September 2019), making it suitable for deployment in harsh environments such as factory automation controllers and outdoor telecom equipment where ambient thermal stability cannot be guaranteed.

Does the IDT7007L25JI8 support true simultaneous read operations from both ports?

Yes, the IDT7007L25JI8 features true dual-ported memory cells that allow simultaneous reads - even from the exact same memory location - without contention or delay. This capability is explicitly stated in the Features section of the datasheet and is fundamental to its use in lock-free status monitoring and real-time data mirroring applications where deterministic latency is required.

How does the BUSY arbitration logic function in master/slave configuration using the IDT7007L25JI8?

In master configuration (M/S = HIGH), BUSYL and BUSYR are push-pull outputs that assert LOW when the opposite port initiates a conflicting access to the same address. In slave configuration (M/S = LOW), BUSYL/BUSYR become inputs that must be driven LOW by the master to inhibit writes - enabling hierarchical arbitration across multiple IDT7007L25JI8 devices in expanded memory systems.

Can the IDT7007L25JI8 be used in a 16-bit data bus configuration?

Yes, the IDT7007L25JI8 supports 16-bit or wider data paths via Master/Slave cascading. When multiple devices are connected, the M/S pin configures one as master (BUSY output) and others as slaves (BUSY input), allowing synchronized access without external arbitration logic. The datasheet confirms this capability enables "full-speed, error-free operation" in 16-bit-or-more word systems.

What are the key differences between the IDT7007L25JI8 and the IDT7007S25JI8?

The IDT7007L25JI8 and IDT7007S25JI8 share identical speed grade (25 ns), package (68-pin PLCC), and functionality, but differ in power optimization: the 'L' suffix denotes low-power variant with typical standby current ISB3 = 0.2 mA, while the 'S' suffix specifies standard power with ISB3 = 1.0 mA. Both operate across the same industrial temperature range and pinout.