Renesas 7026L15J

Overview

7026L15J from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 15 ns max read cycle time (commercial grade), 5 V ±10% single supply, and on-chip semaphore arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7026L15J datasheet, 7026L15J pinout, 7026L15J application, or 7026L15J equivalent, this device supports simultaneous asynchronous access to shared memory between two CPUs or DMA controllers - critical for industrial motion control, avionics data buffers, and telecom packet switching architectures requiring deterministic latency and hardware-enforced resource locking.

Technical Context

The 7026L15J implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling concurrent read/write to any memory location without external arbitration logic. Its on-chip BUSY arbitration resolves port contention via push-pull BUSYL/BUSYR outputs when M/S = HIGH (master mode), or accepts BUSY as write-inhibit inputs when M/S = LOW (slave mode).

It integrates eight hardware semaphore flags accessible via A0–A2 and I/O0, supporting mutual exclusion across processors. The device uses CMOS process technology, delivers 750 mW typical active power, and enters sub-1 mW standby when CE is deasserted - optimized for low-power real-time systems requiring fast wake-up and deterministic timing.

Key Specifications

Pinout & Package

7026L15J is housed in an 84-pin plastic leaded chip carrier (PLCC) package measuring approximately 1.15 in × 1.15 in × 0.17 in. All VCC pins require local decoupling; all GND pins must be connected to system ground plane for signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15JC and IDT70V26S15PF, the 7026L15J uniquely delivers integrated hardware semaphore and push-pull BUSY arbitration in a 5 V, 16-bit dual-port architecture - reducing BOM count, eliminating timing-critical firmware locks, and ensuring sub-20 ns contention resolution for safety-critical applications.

Availability

7026L15J is available at Aetrix Electronics and suitable for industrial motion control, avionics data buffering, and telecom packet switching applications requiring stable component supply, long-term lifecycle support, and guaranteed commercial-grade temperature performance.

Supply support for 7026L15J 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) is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT7026 family was designed specifically for real-time embedded systems requiring deterministic dual-processor memory sharing - delivering hardware-enforced arbitration, low-latency access, and seamless master/slave scalability without external logic.

FAQ

What is the maximum operating frequency supported by the 7026L15J?

The 7026L15J does not operate on a clock signal - it is a fully asynchronous static RAM. Its performance is defined by timing parameters such as tRC (15 ns max read cycle time) and tWC (15 ns max write cycle time), enabling reliable operation in systems with CPU buses running up to 66 MHz without wait states. The 7026L15J achieves this through internal combinational control logic, not synchronous clocking.

How does the M/S pin affect BUSY signal behavior in the 7026L15J?

When M/S = HIGH, the 7026L15J operates as a master: BUSYL and BUSYR are push-pull outputs that assert automatically during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become write-inhibit inputs - external logic must drive them HIGH to permit writes. This dual-mode capability enables flexible arbitration topologies in multi-device memory arrays.

Can the 7026L15J be used in a 32-bit data path configuration?

Yes - the 7026L15J supports 32-bit expansion via master/slave cascading. One device is configured as master (M/S = HIGH) and another as slave (M/S = LOW); their BUSY signals interconnect to coordinate access. The IDT7026 family's dedicated M/S pin and matching BUSY protocol eliminate the need for external arbitration logic, enabling full-speed 32-bit operation without performance penalty.

What is the purpose of the semaphore function in the 7026L15J?

The 7026L15J integrates eight hardware semaphore flags accessible via A0–A2 and I/O0. These flags provide atomic lock/unlock operations for resource sharing between processors - for example, preventing two CPUs from simultaneously writing to a shared control register. Semaphore access requires CE = VIH and SEM = VIL, and is fully independent of main memory array access.

Does the 7026L15J require external pull-up resistors on BUSY pins?

No - the 7026L15J features push-pull BUSY outputs (when configured as master). Unlike open-drain implementations, these outputs actively drive HIGH or LOW without external components, improving noise immunity and simplifying PCB layout. Pull-ups are unnecessary and would interfere with correct BUSY assertion timing.