Renesas 7026L35J8

Overview

IDT7026L35J8 from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 35 ns maximum read cycle time, 1 mA typical standby current, and TTL-compatible 5 V ±10% operation. It implements on-chip semaphore logic and port arbitration for concurrent access control in real-time inter-processor communication systems.

For engineers reviewing the IDT7026L35J8 datasheet, IDT7026L35J8 pinout, IDT7026L35J8 application, or IDT7026L35J8 equivalent, key selection considerations include simultaneous dual-port access timing, BUSY flag arbitration behavior, master/slave cascading capability, byte-selectable I/O control, and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT7026L35J8 features fully asynchronous operation from either port, with separate address (A0L–A13L / A0R–A13R), control (CEL/CER, R/WL/R/WR, OEL/OER, UBL/UBR, LBL/LBR, SEML/SEMR), and bidirectional data (I/O0L–I/O15L / I/O0R–I/O15R) buses. Its on-chip arbitration logic resolves contention via BUSYL/BUSYR signals when both ports access the same memory location.

It supports semaphore flag management via dedicated SEM pins and A0–A2 addressing of eight hardware semaphores, enabling inter-processor synchronization without external logic. The M/S pin configures master (BUSY output) or slave (BUSY input) mode, allowing scalable 32-bit+ memory expansion using cascaded MASTER/SLAVE topology.

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in. All VCC pins require local decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166BAXI and IDT70V26S25PFI, IDT7026L35J8 uniquely delivers 5 V TTL compatibility, industrial temperature support, and proven 35 ns dual-port timing in an 84-pin PLCC-making it irreplaceable in legacy or ruggedized 5 V systems requiring drop-in reliability.

Availability

IDT7026L35J8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and redundant control system memory requiring stable component supply over extended production lifecycles.

Supply support for IDT7026L35J8 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The IDT7026L35J8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic, low-latency shared memory in multi-processor and real-time embedded systems where concurrent access integrity is critical.

FAQ

What is the maximum operating temperature range for IDT7026L35J8?

IDT7026L35J8 is rated for industrial temperature operation from –40°C to +85°C. This specification is production-tested and guaranteed across all electrical parameters including 35 ns access time, standby current, and BUSY arbitration timing. The device uses ceramic-enhanced PLCC packaging to ensure thermal stability under continuous industrial ambient conditions.

Does IDT7026L35J8 support true simultaneous read/write to the same memory location?

Yes, IDT7026L35J8 implements true dual-port memory cells that allow concurrent access to the same address. When contention occurs, on-chip arbitration asserts BUSYL or BUSYR to stall the later-accessing port. The winning port proceeds without delay, and the stalled port resumes after BUSY deasserts - all handled in hardware without software intervention.

How does the M/S pin affect BUSY pin functionality in IDT7026L35J8?

When M/S = HIGH, IDT7026L35J8 operates as a master: BUSYL and BUSYR are push-pull outputs indicating port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that externally inhibit writes. This enables cascaded MASTER/SLAVE configurations for wider data buses without external logic.

What is the purpose of the SEM pins on IDT7026L35J8?

The SEML and SEMR pins on IDT7026L35J8 enable access to eight hardware semaphore registers. When SEM = LOW and CE = HIGH, address bits A0–A2 select one of eight flags, and I/O0 writes the flag value while all I/O lines (I/O0–I/O15) read it. This provides atomic synchronization primitives for inter-processor coordination without software locks.

Can IDT7026L35J8 be used in a 32-bit data path configuration?

Yes, IDT7026L35J8 supports 32-bit expansion via MASTER/SLAVE cascading. One device is configured as master (M/S = HIGH) and another as slave (M/S = LOW). The master's BUSY output connects to the slave's BUSY input, enabling coordinated arbitration across both devices - allowing full 32-bit word access with no external glue logic.