Renesas 7007L15J8

Overview

IDT7007L15J8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 15 ns max access time (commercial grade), 5 V ±10% single-supply operation, and integrated hardware semaphore/arbiter logic - used in real-time inter-processor communication systems requiring simultaneous, contention-free memory access between two CPUs or DMA controllers.

For engineers reviewing the IDT7007L15J8 datasheet, IDT7007L15J8 pinout, IDT7007L15J8 application, or IDT7007L15J8 equivalent, key selection criteria include port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S configuration, semaphore address mapping (A0–A2), interrupt mailbox addresses (7FFEh/7FFFh), and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT7007L15J8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. It supports both CE-controlled and R/W-controlled write cycles, with tWC = 15 ns and tAA = 15 ns (max) for the left/right ports under commercial conditions.

On-chip arbitration includes push-pull BUSY outputs (M/S = H) or inputs (M/S = L), semaphore register bank (8 flags, addressed by A0–A2), and interrupt generation via dedicated mailbox addresses (7FFEh for INTL, 7FFFh for INTR), all operating without external logic.

Key Specifications

Pinout & Package

Package: 80-pin TQFP (14 mm × 14 mm × 1.4 mm body), lead-free and RoHS-compliant. Pinout validated per IDT DSC2940/16 Rev. September 2019, Figure 2940 drw 03 (PNG80).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15JC and R1EX24032AS0C-15, the IDT7007L15J8 uniquely integrates arbitration, semaphore, and interrupt logic in a compact 80-pin TQFP - reducing BOM count, PCB area, and firmware complexity for tightly coupled dual-CPU systems.

Availability

IDT7007L15J8 is available at Aetrix Electronics and suitable for industrial automation, avionics data concentrators, medical imaging subsystems, and real-time DSP co-processing requiring stable component supply across extended lifecycle programs.

Supply support for IDT7007L15J8 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 solutions for communications, computing, and industrial markets.

The IDT7007L15J8 belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in systems where software-managed memory coherency introduces unacceptable latency or jitter.

FAQ

What is the maximum operating temperature range for the IDT7007L15J8?

The IDT7007L15J8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table (Table 2940 tbl 05) and DC Electrical Characteristics section. This rating applies across all speed grades and is production-tested per IDT specification DSC2940/16.

Does the IDT7007L15J8 support true simultaneous read operations on both ports?

Yes, the IDT7007L15J8 features true dual-ported memory cells that allow concurrent reads from the same or different memory locations on the left and right ports without contention or arbitration delay - explicitly stated in the Features section and verified in Truth Table I (2940 tbl 02).

How is semaphore functionality implemented in the IDT7007L15J8?

Semaphore functionality in the IDT7007L15J8 uses eight dedicated flags accessed via A0–A2 address lines when SEM = VIL and CE = VIH. Writes occur on I/O0; reads return data on all I/O lines. This is documented in Truth Table II (2940 tbl 03) and Functional Description (page 17).

What is the function of the M/S pin on the IDT7007L15J8?

The M/S pin configures the IDT7007L15J8 as either master (M/S = H) - enabling BUSY outputs - or slave (M/S = L) - configuring BUSY as inputs. This allows cascading multiple devices into wider data paths with automatic arbitration, as described in the Features section and Pin Names table (2940 tbl 01).

Can the IDT7007L15J8 be used in a single-port configuration?

Yes, the IDT7007L15J8 can operate with only one port enabled (e.g., CEL = VIL, CER = VIH), entering ISB2 standby mode on the inactive port (115 mA typ. for industrial grade). Its dual-port architecture remains intact, but system design may utilize only one side - confirmed in DC Electrical Characteristics Table 2940 tbl 09.