Renesas 7025S35PFGI

Overview

7025S35PFGI from IDT is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 35 ns max read cycle time, TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous reads of the same memory location and is used in real-time inter-processor communication, video frame buffers, and military-grade embedded systems requiring deterministic arbitration.

For engineers reviewing the 7025S35PFGI datasheet, 7025S35PFGI pinout, 7025S35PFGI application, or 7025S35PFGI equivalent, key selection criteria include BUSY-flag arbitration timing (tBAA ≤ 20 ns), semaphore flag support (8 flags via A0–A2), byte-selectable I/O (UBL/LBL), master/slave cascading capability, and 2V data retention in battery-backup mode.

Technical Context

The 7025S35PFGI implements full hardware port arbitration with dedicated BUSY output (master) or input (slave), enabling deterministic conflict resolution during simultaneous access to identical addresses. Its on-chip semaphore logic supports eight independent flags accessed via I/O0–I/O15 using address lines A0–A2, with tSWRD = 5 ns write-to-read latency.

It operates fully asynchronously from either port, with separate CE/R/W/OE/UB/LB controls per side, and supports multiplexed bus compatibility via independent upper- and lower-byte enables. The device uses CMOS process technology and features automatic power-down when chip enable is deasserted, achieving ISB3 ≤ 1.0 mA (full standby, CMOS inputs).

Key Specifications

Pinout & Package

7025S35PFGI is housed in a 100-pin TQFP (PNG100) package measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. Pin functions are symmetrically distributed across left and right ports to support bidirectional data flow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C38097A-35PCN, the 7025S35PFGI uniquely delivers hardware-enforced arbitration, 5 V TTL compatibility, and battery-retained data - making it irreplaceable in deterministic real-time and legacy-mixed-voltage designs.

Availability

7025S35PFGI is available at Aetrix Electronics and suitable for real-time inter-processor communication, video frame buffering, and military avionics data logging requiring stable component supply across extended product lifecycles.

Supply support for 7025S35PFGI 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 memory, timing, and interface solutions for communications, computing, and industrial markets.

The 7025S35PFGI belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic, low-latency shared memory in multi-processor systems where hardware arbitration and industrial reliability are mandatory.

FAQ

What is the maximum operating temperature range for the 7025S35PFGI?

The 7025S35PFGI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per the datasheet's "Recommended DC Operating Conditions" table and applies to all speed grades within the 7025S/L family, including the 35 ns variant. It does not support military-grade –55°C to +125°C operation.

Does the 7025S35PFGI support battery backup operation?

Yes, the 7025S35PFGI supports data retention at VCC = 2.0 V, with ICCDR ≤ 4000 µA over the full industrial temperature range. This capability is inherent to the "L" (low-power) variant designation in the part number and enables nonvolatile operation during main power failure when backed by a coin cell or supercapacitor.

How does the BUSY arbitration mechanism work on the 7025S35PFGI?

The 7025S35PFGI uses hardware-driven BUSY arbitration: when M/S = H (master), BUSY is an output that asserts when both ports attempt simultaneous access to the same address. When M/S = L (slave), BUSY is an input that blocks write operations until deasserted. Timing parameters tBAA (≤20 ns) and tBDD (≤35 ns) define response and data-valid windows.

Can the 7025S35PFGI be used in a 32-bit data path configuration?

Yes, the 7025S35PFGI supports 32-bit expansion via master/slave cascading. One device is configured as master (M/S = H) providing BUSY output; others as slaves (M/S = L) accepting BUSY input. This eliminates external logic and maintains full-speed operation across the expanded bus width, as confirmed in the functional description and pin configuration diagrams.

What package type is used for the 7025S35PFGI?

The 7025S35PFGI uses a 100-pin Thin Quad Flatpack (TQFP) package, designated PNG100 in IDT documentation. Its dimensions are 14 mm × 14 mm × 1.4 mm with 0.5 mm lead pitch and an exposed thermal pad - optimized for surface-mount assembly and thermal dissipation in dense PCB layouts.