Renesas 7026S15J8

Overview

IDT7026S15J8 from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 15 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% operation, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the IDT7026S15J8 datasheet, IDT7026S15J8 pinout, IDT7026S15J8 application, or IDT7026S15J8 equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 15 ns), dual-port power-down control via CE, separate upper/lower byte enables (UBL/LBL, UBR/LBR), and ceramic 84-pin PLCC packaging for industrial temperature operation (–40°C to +85°C).

Technical Context

The IDT7026S15J8 implements fully asynchronous dual-port architecture with independent address, control, and I/O buses per port. Its on-chip arbitration logic uses chip enable (CEL/CER) and address match detection to assert BUSYL/BUSYR outputs in master mode, with tBDD ≤ 18 ns delay from BUSY deassertion to valid read data.

It integrates eight hardware semaphore flags accessible via A0–A2 and I/O0, controlled by SEM/CE polarity inversion (CE = VIH & SEM = VIL for semaphore access). The device supports both R/W-controlled and CE/UB/LB-controlled write cycles, with tWP = 12 ns minimum pulse width and tDH = 0 ns hold requirement.

Key Specifications

Pinout & Package

Package: 84-pin plastic leaded chip carrier (PLCC), 1.15 in × 1.15 in × 0.17 in body, lead-free and RoHS-compliant per ordering information.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V26S15PF8, the IDT7026S15J8 uniquely supports legacy 5V-only systems with industrial temperature range and ceramic PLCC reliability-making it irreplaceable in retrofit or military-grade deployments where voltage compatibility and package robustness are non-negotiable.

Availability

IDT7026S15J8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and industrial PLC data exchange requiring stable component supply across extended lifecycle programs.

Supply support for IDT7026S15J8 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 interface, and RF solutions, now part of Renesas Electronics since 2019.

The IDT7026S15J8 belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic, low-latency shared memory in safety-critical and real-time embedded systems where hardware arbitration and industrial reliability are mandatory.

FAQ

What is the operating temperature range for IDT7026S15J8?

IDT7026S15J8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and supported by DC/AC electrical characteristics tested across this range. The "J" suffix in IDT7026S15J8 explicitly denotes the industrial grade variant, distinct from commercial (no suffix) or military (M suffix) versions.

Does IDT7026S15J8 support true simultaneous access to the same memory location?

Yes, IDT7026S15J8 implements true dual-port memory cells that permit simultaneous read/write operations to identical addresses. When contention occurs, on-chip arbitration logic asserts BUSYL or BUSYR to stall one port while allowing the other to proceed-ensuring data integrity without external logic. This behavior is documented in the Functional Description and Truth Table I.

How does the M/S pin affect BUSY pin functionality in IDT7026S15J8?

When M/S = H, IDT7026S15J8 operates as a master: BUSYL and BUSYR are push-pull outputs indicating address contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become write-inhibit inputs. In slave mode, asserting BUSY low blocks writes regardless of R/W state-a feature used for external arbitration in cascaded configurations.

What package type is used for IDT7026S15J8?

IDT7026S15J8 is packaged in an 84-pin plastic leaded chip carrier (PLCC), as confirmed by the Pin Configurations diagram (DSC 2939/17, page 2) and ordering information notes. The PLCC body measures approximately 1.15 in × 1.15 in × 0.17 in and is RoHS-compliant per manufacturer documentation.

Can IDT7026S15J8 be used in a 32-bit data bus system?

Yes, IDT7026S15J8 supports 32-bit expansion via MASTER/SLAVE cascading. By connecting two devices with M/S = H (master) and M/S = L (slave), and wiring BUSY outputs to BUSY inputs, the system achieves full 32-bit word width with synchronized arbitration. This capability is explicitly stated in the Features section and Functional Block Diagram.