Renesas 7007L15JG

Overview

7007L15JG from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 15 ns maximum access time (commercial grade), 5 V ±10% single-supply operation, and integrated on-chip arbitration logic for concurrent memory access control in real-time inter-processor communication systems.

For engineers reviewing the 7007L15JG datasheet, 7007L15JG pinout, 7007L15JG application, or 7007L15JG equivalent, this device supports simultaneous read/write to the same location, hardware semaphore signaling, interrupt flag generation, BUSY arbitration, and master/slave cascading for 16-bit+ data bus expansion - all critical for deterministic shared-memory embedded designs.

Technical Context

The 7007L15JG implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A14L/I/O0L–I/O7L and A0R–A14R/I/O0R–I/O7R), enabling independent read/write operations without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion (push-pull output) and supports both address-match and CE-controlled arbitration modes.

It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible via SEM = VIL and CE = VIH, and interrupt flags (INTL/INTR) triggered by writes to fixed addresses (7FFE_H/7FFF_H). The M/S pin configures master (BUSY output) or slave (BUSY input) behavior for multi-device systems.

Key Specifications

Pinout & Package

7007L15JG is housed in a 68-pin Plastic Leaded Chip Carrier (PLCC, package code PLG68) with lead pitch of 0.05 inches and body size ≈ 0.95 in × 0.95 in × 0.17 in. All VCC pins require local decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and AS7C33256B-15JCIN, the 7007L15JG uniquely integrates arbitration, semaphore, and interrupt functions in a 68-pin PLCC - reducing PCB area, eliminating discrete logic, and accelerating time-to-market for real-time inter-processor communication.

Availability

7007L15JG is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics data concentrators, and medical imaging frame buffers requiring stable component supply, long-term lifecycle support, and guaranteed commercial-temperature performance.

Supply support for 7007L15JG 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) was a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions before its acquisition by Renesas Electronics in 2019.

The IDT7007 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, mailbox signaling, and seamless multi-device scalability.

FAQ

What is the maximum operating frequency supported by the 7007L15JG?

The 7007L15JG does not operate on a clock signal - it is a fully asynchronous static RAM. Its 15 ns maximum access time (tAA) supports effective random-access read cycles up to approximately 67 MHz (1 / 15 ns). System-level timing depends on address setup/hold and control signal propagation, not a global clock.

Does the 7007L15JG support true simultaneous read/write to the same memory address?

Yes, the 7007L15JG features true dual-ported memory cells that allow simultaneous reads of the same location from both ports. Writes to the same address from both ports are resolved via hardware arbitration - the BUSY flag blocks the later-arriving write, ensuring data integrity without external logic.

How is the master/slave configuration implemented on the 7007L15JG?

The M/S pin configures arbitration behavior: when HIGH, the device operates as a master with BUSYL/BUSYR as push-pull outputs; when LOW, it operates as a slave with BUSYL/BUSYR as inputs that inhibit writes upon assertion. This enables hierarchical cascading without external priority encoding.

Can the 7007L15JG be used in systems requiring extended temperature range?

No - the 7007L15JG is rated for commercial temperature range only (0 °C to +70 °C). For industrial (-40 °C to +85 °C) or military operation, IDT offered variants such as 7007L20JG (20 ns, industrial) or 7007L25JG (25 ns, military), which share identical pinout and functionality but differ in speed grade and qualification testing.

What is the function of the SEM pins on the 7007L15JG?

The SEML and SEMR pins enable access to eight dedicated hardware semaphore flags. When SEM = VIL and CE = VIH, the device enters semaphore mode - A0–A2 select one of eight flags, and I/O0 writes or reads the flag state. This provides atomic resource-locking without CPU intervention or software overhead.