Renesas 7007S25J8

Overview

7007S25J8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum access time, TTL-compatible 5 V ±10% supply, and integrated hardware semaphore and interrupt logic - used in real-time interprocessor communication systems requiring simultaneous memory access without arbitration overhead.

For engineers reviewing the 7007S25J8 datasheet, 7007S25J8 pinout, 7007S25J8 application, or 7007S25J8 equivalent, this page delivers verified timing specs (tRC = 25 ns), power metrics (ISB3 = 0.2 mA typ.), dual-port arbitration behavior, M/S-selectable master/slave configuration, and industrial-grade temperature support (–40°C to +85°C) critical for embedded control and military-computing designs.

Technical Context

The 7007S25J8 implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A14L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A14R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling concurrent read/write operations - including simultaneous reads of the same location. Its on-chip arbitration logic resolves contention via BUSY flag assertion with tBDD ≤ 30 ns delay to valid data.

Hardware semaphore signaling uses dedicated SEM pins (SEML/SEMR) and I/O0–I/O7 to manage eight shared flags addressed by A0–A2; interrupt generation is triggered by writes to fixed mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR), with tINS ≤ 20 ns and tINR ≤ 20 ns propagation. The M/S pin configures BUSYL/BUSYR as output (master) or input (slave), enabling cascaded 16-bit+ memory expansion.

Key Specifications

Pinout & Package

7007S25J8 is housed in an 80-pin thin quad flatpack (TQFP) package (IDT package code PNG80), measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. All VCC pins require decoupling; all GND pins must be solidly connected to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and AS7C33256B-25JCIN, the 7007S25J8 uniquely integrates full hardware arbitration, semaphore, and interrupt logic in a single 80-pin TQFP - reducing system-level complexity, eliminating external logic, and guaranteeing sub-30 ns contention resolution without firmware intervention.

Availability

7007S25J8 is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and telecom infrastructure requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature operation.

Supply support for 7007S25J8 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 interface, and RF solutions for communications, computing, and industrial markets.

The IDT7007 family was engineered specifically for deterministic interprocessor communication - delivering true dual-port SRAM with integrated arbitration, semaphore, and interrupt capabilities to replace discrete logic in real-time embedded systems.

FAQ

What is the maximum operating temperature range for the 7007S25J8?

The 7007S25J8 is rated for industrial temperature operation from –40°C to +85°C, validated across all AC and DC specifications in this range. This rating is confirmed in Table 5 of the official datasheet and applies to the J8 suffix variant, which denotes industrial-grade qualification.

Does the 7007S25J8 support true simultaneous read operations on both ports to the same memory address?

Yes, the 7007S25J8 supports true simultaneous reads of the same memory location on both left and right ports - a core feature of its dual-port SRAM cell architecture. This capability is explicitly stated in the "Features" section and enables lock-free data mirroring without BUSY assertion or arbitration delay.

How does the M/S pin affect BUSY signal behavior on the 7007S25J8?

When M/S = H, BUSYL and BUSYR function as push-pull outputs indicating port contention; when M/S = L, they become inputs accepting BUSY signals from upstream masters in cascaded configurations. This dual-mode behavior is defined in Note 1 of the Pin Names table and enables scalable multi-device memory expansion.

What is the standby current consumption of the 7007S25J8 in full power-down mode?

In full standby mode (ISB3), where both ports are disabled with CMOS-level inputs, the 7007S25J8 consumes 0.2 mA typical - specified in Table 9 of the datasheet under "7007S" column for industrial grade. This ultra-low quiescent current supports energy-sensitive applications like portable test equipment.

Can the 7007S25J8 be used without connecting the semaphore or interrupt pins?

Yes, the 7007S25J8 operates fully as a dual-port SRAM without using SEM, INT, or BUSY pins. Those features are optional: semaphore access requires CE = VIH and SEM = VIL; interrupts rely on fixed mailbox addresses (7FFE_H/7FFF_H). Unused pins may be left unconnected or tied to inactive logic levels per system requirements.