Renesas 7026S25G

Overview

7026S25G from IDT (Integrated Device Technology) is a high-speed 16K × 16 true dual-port static RAM with independent left/right ports, 25 ns maximum access time (commercial grade), TTL-compatible 5 V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous read/write to the same memory location in real-time industrial control and digital signal processing systems.

For engineers reviewing the 7026S25G datasheet, 7026S25G pinout, 7026S25G application, or 7026S25G equivalent, key selection criteria include BUSY flag timing (tBAA ≤ 20 ns), dual-port arbitration behavior under M/S configuration, byte-selectable I/O control (UBL/LBL), and industrial temperature support (-40°C to +85°C) for embedded motion control and radar data buffering.

Technical Context

The 7026S25G implements fully asynchronous dual-port operation with separate address, control, and bidirectional I/O buses per port (A0L–A13L/I/O0L–I/O15L and A0R–A13R/I/O0R–I/O15R). Its on-chip arbitration logic uses chip enable (CEL/CER) and address match detection-not R/W state-to assert BUSYL/BUSYR outputs in master mode (M/S = H).

Semaphore functionality is implemented via dedicated SEM pins and A0–A2 addressing of eight hardware flags, accessible only when CE = VIH and SEM = VIL. Power management includes four standby modes (ISB1–ISB4), with full CMOS-level standby current as low as 0.2 mA (typ.) for the 7026S variant.

Key Specifications

Pinout & Package

7026S25G is packaged in an 84-pin PLCC (Plastic Leaded Chip Carrier) with 1.15 in × 1.15 in body size and 0.050 in lead pitch. All VCC and GND pins require local decoupling per JEDEC standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-25JC and AS7C316000B-25JIN, the 7026S25G uniquely integrates on-chip semaphore arbitration and MASTER/SLAVE expansion capability-reducing external logic count by up to 12 components while maintaining full 5 V TTL compatibility and industrial temperature operation.

Availability

7026S25G is available at Aetrix Electronics and suitable for industrial motion control, radar signal processing, digital audio mixing, and avionics display generation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7026S25G 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, and interface solutions, now part of Renesas Electronics since 2019.

The IDT7026 family was designed specifically for real-time embedded systems requiring deterministic dual-ported memory access-targeting applications in industrial automation, defense electronics, and telecommunications infrastructure where concurrent data sharing and hardware-enforced synchronization are critical.

FAQ

What is the maximum operating frequency supported by the 7026S25G?

The 7026S25G does not operate on a clock signal-it is fully asynchronous. Its performance is defined by access time: 25 ns maximum address access time (tAA) and 25 ns maximum read cycle time (tRC). This enables reliable operation with bus toggle rates up to 40 MHz in well-designed layouts, assuming proper setup/hold timing (tAS = 0 ns, tDH = 0 ns) and termination.

Does the 7026S25G support 3.3 V operation?

No, the 7026S25G requires a single 5.0 V ±10% supply (4.5 V to 5.5 V) and is TTL-compatible. It does not support 3.3 V core or I/O operation. Using it with 3.3 V controllers requires level-shifting on all address, control, and data lines-adding complexity and timing uncertainty that defeats the purpose of its deterministic dual-port architecture.

How does the BUSY arbitration logic function in master versus slave configuration for the 7026S25G?

In master mode (M/S = H), BUSYL and BUSYR are push-pull outputs asserting LOW when address contention occurs; in slave mode (M/S = L), they become inputs that internally inhibit writes when driven LOW. The 7026S25G's BUSY logic responds only to chip enable and address stability-not R/W state-and requires tAPS ≥5 ns setup to guarantee correct priority resolution.

Can the 7026S25G be used without connecting the BUSY pins?

Yes-the 7026S25G operates correctly with BUSYL and BUSYR unconnected or tied HIGH in master mode. When unused, BUSY logic is effectively disabled, and contention results in undefined data. For robust multi-processor systems, however, leaving BUSY unmanaged risks data corruption; the 7026S25G's integrated arbitration is a key differentiator versus basic dual-port RAMs.

What package type is used for the 7026S25G, and is thermal relief required?

The 7026S25G uses an 84-pin PLCC package (1.15 in × 1.15 in body). Its thermal resistance (θJA) is not specified in the datasheet, but typical PLCC packages of this size dissipate ≤750 mW active power with minimal junction rise (<15°C) using standard 2 oz copper and 4 thermal vias under the package. No dedicated heatsink is required for industrial ambient conditions.