Renesas 7026L20JI

Overview

IDT7026L20JI from Integrated Device Technology (IDT) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 20 ns maximum access time, 1 mW typical standby power, and industrial temperature range (−40°C to +85°C). It enables simultaneous asynchronous read/write to the same memory location in real-time interprocessor communication systems.

For engineers reviewing the IDT7026L20JI datasheet, IDT7026L20JI pinout, IDT7026L20JI application, or IDT7026L20JI equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 20 ns), dual-byte control (UBL/LBL), on-chip semaphore logic (8 flags), and 84-pin PLCC package compatibility for legacy military/industrial backplane designs.

Technical Context

The IDT7026L20JI implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - no clock required. Its on-chip arbitration logic uses chip enable (CEL/CER) and address match detection to assert BUSYL/BUSYR outputs within 20 ns when both ports access identical addresses.

It supports semaphore flag management via dedicated SEM pins and A0–A2 addressing, enabling inter-processor synchronization without external logic. The device operates from a single 5.0 V ±10% supply and features TTL-compatible inputs/outputs with push-pull BUSY outputs requiring no pull-ups.

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in, lead finish Sn/Pb, RoHS-compliant green variant available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and IS61LV25616AL-20TQLI, the IDT7026L20JI uniquely delivers guaranteed industrial temperature operation, on-chip semaphore flags, and hardware BUSY arbitration - eliminating external components and reducing system-level timing uncertainty in safety-critical embedded designs.

Availability

IDT7026L20JI is available at Aetrix Electronics and suitable for real-time interprocessor communication, industrial motion control, and military avionics applications requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for IDT7026L20JI 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.

The IDT7026L20JI belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic, low-latency interprocessor communication in industrial, military, and telecom infrastructure where hardware-enforced memory coherency is mandatory.

FAQ

What is the maximum operating temperature range for the IDT7026L20JI?

The IDT7026L20JI is rated for industrial temperature operation from −40°C to +85°C. This specification is production-tested and guaranteed across all electrical parameters in the datasheet, including 20 ns access time and 1 mW standby power. It does not support extended military ranges (−55°C to +125°C) - those require the MIL-PRF-38535 QML-qualified IDT7026S25JI variant.

Does the IDT7026L20JI support true simultaneous read/write to the same memory address?

Yes, the IDT7026L20JI implements true dual-port memory cells that permit independent, asynchronous read and write operations to the exact same memory location. When contention occurs, its hardware BUSY logic asserts BUSYL or BUSYR within 20 ns to stall the later-accessing port - preserving data integrity without software intervention. This behavior is confirmed in Truth Table I and the Functional Description section of the datasheet.

How does the semaphore functionality work on the IDT7026L20JI?

The IDT7026L20JI integrates eight hardware semaphore flags accessible via I/O0 and addressed by A0–A2. To use them, set CE = VIH and SEM = VIL, then write "0" to claim or "1" to release a flag. All 16 I/O lines reflect the flag state during reads. This eliminates external semaphores and reduces IPC overhead - verified in Truth Table III and Semaphore Read/Write Control (Table II) of the datasheet.

Can the IDT7026L20JI be used in a master/slave configuration for wider data buses?

Yes, the IDT7026L20JI supports master/slave cascading via the M/S pin to expand data width beyond 16 bits. When configured as master (M/S = H), BUSYL/BUSYR are outputs; as slave (M/S = L), they become inputs for write inhibition. Multiple devices can be combined for 32-bit or wider word systems without external logic - explicitly stated in the Description and Functional Block Diagram sections.

What package type is used for the IDT7026L20JI, and is it RoHS-compliant?

The IDT7026L20JI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC) with dimensions approximately 1.15 in × 1.15 in × 0.17 in. Per the datasheet's ordering information, "green parts" (lead-free, RoHS-compliant) are available - indicated by the suffix '-GI' in alternate ordering codes. The 'J' in IDT7026L20JI denotes the PLCC package, and 'I' confirms industrial temperature grade.