Renesas 7026L20J8

Overview

IDT7026L20J8 from IDT (now Renesas) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and on-chip semaphore arbitration logic - used in real-time inter-processor communication, video frame buffers, and military-grade embedded systems requiring concurrent read/write access to shared memory.

For engineers reviewing the IDT7026L20J8 datasheet, IDT7026L20J8 pinout, IDT7026L20J8 application, or IDT7026L20J8 equivalent, key selection criteria include simultaneous port arbitration timing (tBDD ≤ 30 ns), master/slave BUSY flag behavior (M/S pin configurable), byte-selectable I/O control (UBL/LBL), and industrial temperature support (–40°C to +85°C).

Technical Context

The IDT7026L20J8 implements fully asynchronous dual-port operation with separate address, control, and data buses per port - enabling concurrent reads/writes to any memory location without external logic. Its on-chip arbitration uses chip enable (CEL/CER) and address match detection to assert BUSYL/BUSYR within 20 ns (tBAA), while semaphore logic (SEML/SEMR) supports eight hardware flags addressed via A0–A2 for inter-processor synchronization.

It features TTL-compatible 5V ±10% single-supply operation, automatic CE-controlled power-down, and push-pull BUSY outputs (no pull-ups required). The device supports cascaded 32-bit+ word expansion using M/S select and includes separate upper/lower byte enables (UBL/LBL, UBR/LBR) for multiplexed bus compatibility.

Key Specifications

Pinout & Package

Package: 84-pin PLCC (plastic leaded chip carrier), body size ≈ 1.15 in × 1.15 in × 0.17 in. All VCC pins require connection to +5V supply; all GND pins must be tied to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and AS7C316000B-20JC, the IDT7026L20J8 uniquely delivers integrated semaphore logic, push-pull BUSY outputs eliminating external components, and industrial temperature qualification - making it the only option for deterministic, lock-free inter-processor communication in mission-critical systems.

Availability

IDT7026L20J8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and military avionics data hubs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for IDT7026L20J8 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

Renesas Electronics (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and memory solutions for industrial, automotive, and infrastructure markets.

The IDT7026L20J8 belongs to the IDT7026 family of high-speed dual-port SRAMs, designed specifically for deterministic, low-latency shared memory in multi-processor systems where hardware arbitration and semaphore signaling eliminate software bottlenecks.

FAQ

What is the operating temperature range for the IDT7026L20J8?

The IDT7026L20J8 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics tables of the official datasheet (DSC 2939/17, August 2019), and applies to the "L" speed grade with 20 ns access time. It is not rated for commercial or military temperature ranges unless explicitly ordered with those suffixes.

Does the IDT7026L20J8 support true simultaneous read/write to the same memory address?

Yes, the IDT7026L20J8 supports true simultaneous access to the same memory location via its dual-port architecture. When contention occurs, on-chip arbitration asserts BUSYL or BUSYR within 20 ns (tBAA), stalling the later access. The winning port proceeds unimpeded, while the stalled port's write is internally gated - 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 on the IDT7026L20J8?

When M/S = HIGH, the IDT7026L20J8 operates as a master: BUSYL and BUSYR are push-pull outputs indicating address contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW. This configuration enables hierarchical arbitration in multi-device systems and is detailed in Pin Names table (2939 tbl 01) and Functional Description section.

What is the standby current consumption of the IDT7026L20J8?

The IDT7026L20J8 has a typical standby current of 1 mW (ISB3) when both ports are fully disabled with CMOS-level inputs (CE > VCC − 0.2 V), as specified in Table 10 (2939 tbl 10). This equates to approximately 200 µA at 5 V. For TTL-level standby (CEL/CER = VIH), ISB1 is 30 mA max at industrial temperature - confirming the "L" suffix denotes low-power optimization over the "S" variant.

Can the IDT7026L20J8 be used in a 32-bit data bus configuration?

Yes, the IDT7026L20J8 supports 32-bit expansion using master/slave cascading. One device is configured as master (M/S = HIGH), another as slave (M/S = LOW); the master's BUSY output connects to the slave's BUSY input. This topology enables full-speed 32-bit word access without additional discrete logic, as described in the Description section and Functional Block Diagram of DSC 2939/17.