Renesas 7008L15J

Overview

IDT7008L15J from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-port static RAM with independent left/right ports, 15 ns maximum access time (commercial grade), TTL-compatible 5 V ±10% supply, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7008L15J datasheet, IDT7008L15J pinout, IDT7008L15J application, or IDT7008L15J equivalent, key selection considerations include port-to-port BUSY arbitration timing (tBDD ≤15 ns), low standby power (1 mW typ.), Master/Slave cascading capability via M/S pin, and support for simultaneous read/write to same address without corruption.

Technical Context

The IDT7008L15J implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling concurrent read/write operations without internal contention. Its on-chip arbitration logic uses push-pull BUSY flags (BUSYL/BUSYR) and hardware semaphore registers (A0–A2 addressed, 8 flags) to coordinate access between independent masters.

It supports both CE-controlled and R/W-controlled write cycles, with tEW (12 ns min) and tWP (12 ns min) defining valid write windows. The M/S pin configures BUSY as output (Master, VIH) or input (Slave, VIL), enabling depth expansion of 16-bit+ data buses without external logic.

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leadless Chip Carrier (PLCC), body size 14 mm × 14 mm × 1.4 mm, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15JC and AS7C362000B-15JC, the IDT7008L15J uniquely integrates hardware BUSY arbitration and semaphore registers in a 5 V TTL-compatible package - eliminating external logic and reducing firmware complexity for real-time dual-processor designs.

Availability

IDT7008L15J is available at Aetrix Electronics and suitable for real-time industrial PLCs, avionics data concentrators, medical imaging subsystems, and dual-core DSP co-processing applications requiring stable component supply and long-term obsolescence management.

Supply support for IDT7008L15J 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance silicon solutions for communications, computing, and industrial markets.

The IDT7008L15J belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration, low latency, and 5 V compatibility are mandatory.

FAQ

What is the maximum operating temperature range for the IDT7008L15J?

The IDT7008L15J is rated for commercial temperature operation from 0°C to +70°C. It is not specified for industrial temperature range (–40°C to +85°C); that grade is available in other speed variants like IDT7008L20J but not the '15' speed bin.

Does the IDT7008L15J support true simultaneous read operations from both ports to the same memory address?

Yes, the IDT7008L15J uses true dual-port SRAM cells that allow concurrent reads from identical addresses on left and right ports without conflict, corruption, or additional timing constraints - a core architectural feature confirmed in the Functional Description section.

How does the M/S pin affect BUSY signal behavior on the IDT7008L15J?

When M/S = VIH, BUSYL and BUSYR function as push-pull outputs indicating port contention; when M/S = VIL, they become inputs used to synchronize writes in slave configuration. This dual-mode behavior is fundamental to cascading multiple IDT7008L15J devices in master/slave topology.

What is the minimum pulse width required for a valid write cycle on the IDT7008L15J?

The IDT7008L15J requires a minimum write pulse width (tWP) of 12 ns for reliable memory array writes. This value is specified in the AC Electrical Characteristics table and must be met regardless of whether timing is controlled by R/W or CE signals.

Can the IDT7008L15J be used in a 3.3 V system?

No - the IDT7008L15J is strictly a 5 V ±10% device (4.5 V to 5.5 V). Its inputs are TTL-compatible but not 3.3 V tolerant; applying 3.3 V logic levels risks violating VIL/VIL thresholds and causing undefined operation. A level-shifting interface is mandatory for 3.3 V host systems.