Renesas 7007L15JG8

Overview

7007L15JG8 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, and integrated hardware semaphore and interrupt logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7007L15JG8 datasheet, 7007L15JG8 pinout, 7007L15JG8 application, or 7007L15JG8 equivalent, this device supports simultaneous asynchronous reads/writes across ports, on-chip arbitration, BUSY flag signaling, and MASTER/SLAVE cascading for 16-bit+ memory expansion - critical for multi-CPU industrial controllers and telecom line cards.

Technical Context

The 7007L15JG8 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). It uses CMOS process technology and supports both RAM mode (CE = LOW, SEM = HIGH) and semaphore mode (CE = HIGH, SEM = LOW).

Its arbitration logic enforces deterministic port priority via M/S pin configuration: when M/S = HIGH, BUSYL/BUSYR are outputs indicating contention; when M/S = LOW, BUSYL/BUSYR become inputs that inhibit writes during conflict. The device provides push-pull BUSY and INT outputs - not open-drain - and guarantees tBDD ≤ 18 ns for port-to-port write-read synchronization.

Key Specifications

Pinout & Package

7007L15JG8 is housed in an 80-pin thin quad flatpack (TQFP) package (IDT package code PNG80), measuring approximately 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15VC and AS7C33256P-15JC, the 7007L15JG8 uniquely integrates arbitration, semaphore, and interrupt logic - reducing BOM count by up to 3 discrete ICs and eliminating timing-critical external glue logic in tightly coupled multi-CPU designs.

Availability

7007L15JG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line card control, avionics data concentrators, and medical imaging subsystems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 7007L15JG8 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 memory, timing, and interconnect solutions before its acquisition by Renesas Electronics in 2019. It pioneered dual-port SRAM architectures for real-time embedded systems.

The 7007L15JG8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in multi-CPU industrial, telecom, and aerospace systems where hardware-enforced arbitration and low-latency shared memory are mandatory.

FAQ

What is the maximum operating frequency supported by the 7007L15JG8?

The 7007L15JG8 does not operate at a fixed clock frequency but supports asynchronous operation with a minimum read cycle time (tRC) of 15 ns, enabling effective data transfer rates up to 66.7 million operations per second. Its timing is governed by address, CE, OE, and R/W setup/hold relationships - not a system clock - making it suitable for event-driven multi-processor architectures where deterministic latency matters more than synchronous throughput.

Does the 7007L15JG8 support true simultaneous read operations from both ports to the same memory location?

Yes, the 7007L15JG8 features true dual-ported memory cells that allow concurrent reads from both left and right ports to identical or overlapping addresses without contention or data corruption. This capability is inherent to its silicon architecture and requires no external arbitration - unlike single-port SRAMs with multiplexed buses - making it ideal for mirrored data access in redundant control systems.

How does the M/S pin affect BUSY signal behavior in the 7007L15JG8?

When M/S = HIGH, the 7007L15JG8 operates as a MASTER: BUSYL and BUSYR are push-pull outputs reflecting arbitration status (e.g., BUSYR = LOW indicates right-port write contention). When M/S = LOW, it operates as a SLAVE: BUSYL and BUSYR become inputs that must be driven externally to inhibit writes during conflict - enabling hierarchical multi-device configurations without bus contention.

Can the 7007L15JG8 be used in MASTER/SLAVE cascaded configurations for 16-bit data paths?

Yes, the 7007L15JG8 supports MASTER/SLAVE cascading via the M/S pin to construct wider memory interfaces. Two devices can be combined - one as MASTER (M/S = HIGH), one as SLAVE (M/S = LOW) - with shared address and control lines and interleaved data buses (e.g., I/O0–I/O7 from first device + I/O0–I/O7 from second) to achieve 16-bit word access while maintaining full 15 ns speed and hardware arbitration integrity.

What are the voltage and timing requirements for accessing the semaphore registers in the 7007L15JG8?

To access semaphore registers, the 7007L15JG8 requires CE = HIGH and SEM = LOW (opposite of RAM mode). Address bits A0–A2 select one of eight semaphore flags; I/O0 writes the flag value, and all I/O lines (I/O0–I/O7) read it back. Timing parameters include tSAA ≤ 15 ns (semaphore address access) and tSOP ≥ 10 ns (update pulse width), verified under VCC = 5.0 V ±10% and TA = +25°C conditions per the official datasheet.