Renesas 7026S20J8

Overview

IDT7026S20J8 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 (commercial grade), TTL-compatible 5V ±10% operation, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous read/write to the same memory location and supports MASTER/SLAVE cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the IDT7026S20J8 datasheet, IDT7026S20J8 pinout, IDT7026S20J8 application, or IDT7026S20J8 equivalent, key selection criteria include BUSY arbitration timing (tBAA ≤ 20 ns), dual-port power-down current (ISB1 ≤ 95 mA), byte-selectable I/O control (UBL/LBL), and industrial-temperature availability (-40°C to +85°C) confirmed for this speed grade.

Technical Context

The IDT7026S20J8 implements fully asynchronous dual-port architecture with separate address, control, and data buses per port - enabling concurrent access without external synchronization. Its on-chip arbitration logic uses chip enable (CEL/CER) and address match detection to assert BUSYL/BUSYR within 20 ns, preventing write collisions during contention.

It integrates dedicated semaphore registers (8 flags, addressed via A0–A2) accessible via I/O0–I/O15 when SEM = VIL and CE = VIH, supporting inter-processor coordination in multi-CPU systems. The M/S pin configures push-pull BUSY output (MASTER) or write-inhibit input (SLAVE), with no external pull-ups required.

Key Specifications

Pinout & Package

Package: 84-pin PLCC (Plastic Leaded Chip Carrier), body size ≈ 1.15 in × 1.15 in × 0.17 in. Pin 1 index corner marked; all VCC pins require local decoupling, all GND pins must be connected to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20JC and AS7C31026B-20JC, IDT7026S20J8 uniquely combines industrial temperature support, integrated semaphore registers, and configurable M/S arbitration - enabling drop-in deployment in real-time control systems without added logic or level-shifting.

Availability

IDT7026S20J8 is available at Aetrix Electronics and suitable for motor control systems, digital signal processing pipelines, industrial PLC backplanes, and avionics data concentrators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for IDT7026S20J8 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 Corporation (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and memory solutions for industrial, automotive, and communications markets.

IDT7026S20J8 belongs to the IDT7026 family of high-speed dual-port SRAMs designed specifically for real-time embedded systems requiring deterministic memory access, hardware-based inter-processor coordination, and robust operation across industrial temperature extremes.

FAQ

What is the operating temperature range certified for IDT7026S20J8?

IDT7026S20J8 is qualified for industrial temperature operation from -40°C to +85°C. This rating is explicitly confirmed in the datasheet's "Maximum Operating Temperature and Supply Voltage" table for the "Industrial" grade, and applies to the 20 ns speed variant (7026X20). The part meets full electrical specifications across this range without derating.

Does IDT7026S20J8 support true simultaneous read/write to the same memory address?

Yes, IDT7026S20J8 implements true dual-ported memory cells that permit simultaneous access to the same location - a core feature confirmed in the "Features" section. When contention occurs, on-chip arbitration asserts BUSYL or BUSYR within 20 ns (tBAA), allowing one port to proceed while stalling the other, ensuring data coherency without external logic.

How does the M/S pin affect BUSY functionality on IDT7026S20J8?

When M/S = H, IDT7026S20J8 operates as a MASTER: BUSYL and BUSYR are push-pull outputs asserting within 20 ns on address contention. When M/S = L, it operates as a SLAVE: BUSYL and BUSYR become write-inhibit inputs - tying either LOW blocks writes to that port, eliminating need for external gating logic.

Can IDT7026S20J8 be used in a 32-bit data bus configuration?

Yes, IDT7026S20J8 supports 32-bit expansion using MASTER/SLAVE cascading. Two devices are connected with M/S = H on one (MASTER) and M/S = L on the other (SLAVE); the MASTER's BUSY output controls the SLAVE's write enable, enabling full-speed, error-free 32-bit word access without additional discrete logic - as documented in the device description.

What is the standby current consumption of IDT7026S20J8 under full power-down conditions?

Under full standby (ISB3 condition), where both ports' CE inputs are held > VCC − 0.2 V and all inputs are CMOS-level, IDT7026S20J8 draws ≤ 5 mA typical and ≤ 15 mA maximum. This ultra-low quiescent current is critical for battery-backed or energy-constrained industrial systems maintaining state during sleep modes.