Renesas 7007L25JI

Overview

IDT7007L25JI 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), 5 V ±10% single-supply operation, and integrated hardware semaphore and interrupt logic - used in real-time inter-processor communication systems such as industrial PLCs and avionics data concentrators.

For engineers reviewing the 7007L25JI datasheet, 7007L25JI pinout, 7007L25JI application, or 7007L25JI equivalent, this page delivers verified timing specs, master/slave arbitration behavior, BUSY/INT signal timing, semiconductor-grade standby current values, and confirmed 80-pin TQFP package mapping - all extracted from the official IDT DSC 2940/16 datasheet (September 2019).

Technical Context

The 7007L25JI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write to the same memory location only when non-contentious - its on-chip arbitration logic resolves contention via BUSY flag assertion with tBDD ≤ 30 ns (M/S = VIH). It supports both CE-controlled and R/W-controlled write cycles, with tEW ≤ 20 ns and tWP ≤ 20 ns.

Hardware semaphore signaling uses A0–A2 to select among eight flags, accessed with SEM = VIL and CE = VIH; interrupt generation is triggered by writes to fixed addresses 7FFE_H (left port INTL) and 7FFF_H (right port INTR), with tINS ≤ 20 ns and tINR ≤ 20 ns - all operating under industrial −40°C to +85°C conditions.

Key Specifications

Pinout & Package

7007L25JI is packaged in an 80-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with 0.5 mm pitch and exposed thermal pad (not electrically connected). All VCC pins require local decoupling; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AC, the 7007L25JI integrates arbitration, semaphore, and interrupt logic on-die - reducing design complexity and validation effort. Unlike R1EX24064BGS, it delivers true parallel dual-port performance essential for real-time deterministic systems.

Availability

7007L25JI is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data concentrators, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for 7007L25JI 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), now part of Renesas Electronics, specializes in high-performance timing, memory, and interface ICs for communications, computing, and industrial markets.

The IDT7007 family was designed specifically for deterministic inter-processor communication in dual-CPU systems - delivering hardware-enforced memory coherency without software overhead or external logic.

FAQ

What is the maximum operating temperature range certified for the 7007L25JI?

The 7007L25JI is rated for industrial temperature operation from −40°C to +85°C, as confirmed in the Absolute Maximum Ratings and Recommended DC Operating Conditions tables of the IDT DSC 2940/16 datasheet. This range is validated across all AC and DC specifications including tAA ≤ 25 ns and ISB3 ≤ 0.2 mA.

Does the 7007L25JI support true simultaneous read/write to the same memory address on both ports?

No - the 7007L25JI permits simultaneous reads to the same address, but simultaneous writes to identical addresses trigger BUSY arbitration. When contention occurs, the port asserting address/control first wins; the losing port's write is blocked until BUSY deasserts, with tBDD ≤ 30 ns (M/S = VIH) ensuring bounded latency.

How is semaphore functionality implemented in the 7007L25JI, and what are the timing constraints?

Semaphore flags are accessed by setting SEM = VIL and CE = VIH, then using A0–A2 to select one of eight flags. Write-to-read turnaround is tSWRD ≤ 5 ns; contention window tSPS ≤ 5 ns ensures deterministic flag acquisition. Semaphore data is written via I/O0 and read across all I/O lines, per Truth Table II.

What package type and pin count does the 7007L25JI use, and are there alternate packages?

The 7007L25JI uses an 80-pin TQFP package (PNG80), 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch. While the IDT7007 family also offered 68-pin PLCC (PLG68) and 68-pin PGA (GU68) variants, the 'J' suffix in 7007L25JI explicitly denotes the TQFP option per IDT ordering conventions.

Can the 7007L25JI be used in a master/slave configuration, and how is it enabled?

Yes - the M/S pin configures operational mode: M/S = VIH makes BUSYL/BUSYR outputs (master), while M/S = VIL makes them inputs (slave). In slave mode, BUSY input inhibits writes; in master mode, BUSY output signals contention. This enables scalable multi-port memory systems without external arbitration logic.