Renesas 7025S17G

Overview

7025S17G from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent left/right ports, 17 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% operation, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access 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 7025S17G datasheet, 7025S17G pinout, 7025S17G application, or 7025S17G equivalent, this page delivers verified timing parameters, validated dual-port arbitration behavior, confirmed 84-pin PGA package mapping, and precise standby/active power consumption values per operating mode - all critical for deterministic multi-processor memory sharing designs.

Technical Context

The 7025S17G implements fully asynchronous dual-port architecture with separate address, data, and control buses per port, enabling concurrent read/write operations without external arbitration logic. Its on-chip hardware semaphore system uses A0–A2 addressing to manage eight shared flags via I/O0–I/O15, supporting inter-processor synchronization in lock-step or priority-based protocols.

Port arbitration is enforced through BUSY flag generation (M/S = H) or detection (M/S = L), with tBDD timing ensuring valid data delivery after contention resolution. The device supports battery backup retention at 2V (L-version only), but the 7025S17G variant operates in commercial temperature range (0°C to +70°C) with active power typical of 170 mA and standby current as low as 13 mA under TTL-level inputs.

Key Specifications

Pinout & Package

7025S17G is packaged in an 84-pin ceramic Pin Grid Array (PLG84), with body dimensions approximately 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 CY7C136-15VC and IDT70V25S17PF, the 7025S17G uniquely delivers 5V TTL compatibility, integrated semaphore registers, and proven 84-pin PGA reliability in commercial-temperature industrial control - making it irreplaceable where legacy interface integrity and hardware synchronization are mandatory.

Availability

7025S17G is available at Aetrix Electronics and suitable for real-time motion control, digital signal processor co-processing, and industrial PLC I/O mapping requiring stable component supply across extended production lifecycles.

Supply support for 7025S17G 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) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019.

The 7025S17G belongs to IDT's high-speed dual-port SRAM product line, engineered for deterministic multi-processor memory sharing in industrial automation, test instrumentation, and avionics systems demanding sub-20 ns latency and hardware-enforced synchronization.

FAQ

What is the maximum operating speed of the 7025S17G?

The 7025S17G has a maximum read cycle time of 17 ns, corresponding to a theoretical peak bandwidth of approximately 58.8 MB/s per port under ideal conditions. This timing is guaranteed across the commercial temperature range (0°C to +70°C) with VCC = 5.0 V ±10%, and applies to both read and write cycles as specified in the AC Electrical Characteristics table of the official datasheet.

Does the 7025S17G support battery backup operation?

No - battery backup with 2V data retention is exclusive to the 'L' version (e.g., 7025L17G). The 7025S17G is the standard-power variant and does not support data retention below 4.5V. Its minimum operating VCC is 4.5V, and operation below that threshold may cause data corruption or functional failure.

How does the BUSY flag function in MASTER vs. SLAVE configuration for the 7025S17G?

When M/S = H, the 7025S17G operates as MASTER: BUSYL/BUSYR are outputs asserting during port contention. When M/S = L, it operates as SLAVE: BUSYL/BUSYR become inputs used to block writes until the MASTER releases the resource. The 7025S17G's BUSY timing (tBAA, tBDA) is characterized specifically for this dual-role behavior and must be observed in both configurations.

Can the 7025S17G be used in a 32-bit data bus system?

Yes - the 7025S17G supports 32-bit expansion via MASTER/SLAVE cascading. One device is configured as MASTER (M/S = H) and another as SLAVE (M/S = L); BUSY signals coordinate access, and CE/UB/LB controls enable seamless 32-bit word alignment without external logic. This architecture is explicitly validated in the device's functional description and timing diagrams.

What is the purpose of the SEM pin on the 7025S17G?

The SEM (Semaphore Enable) pin on the 7025S17G activates the on-chip semaphore register bank. When SEM = L, the device interprets A0–A2 as semaphore address lines and routes I/O0–I/O15 to eight dedicated 16-bit semaphore flags. This hardware mechanism enables atomic test-and-set operations between processors, eliminating race conditions without software intervention or external latches.