Renesas 7025S15PF

Overview

7025S15PF from IDT (Integrated Device Technology) is a high-speed, 8K × 16-bit true dual-port static RAM with independent left/right ports, 15 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 7025S15PF datasheet, 7025S15PF pinout, 7025S15PF application, or 7025S15PF equivalent, this page delivers verified timing specs (tRC = 15 ns), power metrics (750 mW active, 5 mW standby), dual-port arbitration behavior, BUSY/INT flag functionality, and precise PLCC-84 package mapping - all confirmed from IDT's official DSC 2683/13 datasheet (October 2019).

Technical Context

The 7025S15PF implements fully asynchronous dual-port architecture with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O15L and A0R–A12R/I/O0R–I/O15R), enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports eight hardware semaphores addressed by A0–A2.

It features byte-selectable I/O (UBL/LBL and UBR/LBR), master/slave configuration via M/S pin, interrupt flag generation (INTL/INTR), and battery backup data retention at 2V (IDT7025L variant). The device operates across commercial temperature range (0°C to +70°C) and requires no external wait-state generation due to deterministic 15 ns access timing.

Key Specifications

Pinout & Package

7025S15PF is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC-84), body size ≈ 1.12 in × 1.12 in × 0.16 in, with lead finish matte tin. All VCC pins require local decoupling; all GND pins must be connected to system ground plane for signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15VC and IDT70V25S15PF, the 7025S15PF uniquely delivers 5V TTL compatibility, integrated semaphore arbitration, and MASTER/SLAVE cascading in a single PLCC-84 package - making it optimal for legacy industrial and avionics systems where board space, power budget, and deterministic inter-port coordination are critical.

Availability

7025S15PF is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial PLC memory buffering, avionics display frame storage, and automated test equipment pattern generation requiring stable component supply and long-term obsolescence management.

Supply support for 7025S15PF 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 high-performance memory, timing, and interface solutions before its acquisition by Renesas Electronics in 2019. It delivered robust, military-qualified components for demanding embedded applications.

The IDT7025 family was designed specifically for deterministic, low-latency dual-port memory applications in real-time control, communications, and instrumentation - emphasizing hardware arbitration, byte-level granularity, and seamless 5V system integration.

FAQ

What is the maximum operating frequency supported by the 7025S15PF?

The 7025S15PF supports a maximum read cycle time (tRC) of 15 ns, corresponding to a theoretical maximum sustained access rate of 66.7 MHz. This is measured under commercial conditions (0°C to +70°C, VCC = 5.0 V ±10%) with all timing parameters (tAA, tACE, tAOE) met. The device is fully asynchronous and does not require a clock signal - timing is governed solely by control signal setup/hold and propagation delays.

Does the 7025S15PF support battery backup operation?

Yes, the 7025S15PF supports data retention at VCC = 2.0 V minimum, as specified in the datasheet's "Data Retention Characteristics" section. While the 'S' suffix denotes standard power (750 mW active, 5 mW standby), the underlying IDT7025 architecture retains data down to 2V. This enables reliable holdover during brown-out events or controlled power-down sequences without external capacitors or backup circuitry.

How does the BUSY arbitration mechanism work on the 7025S15PF?

When configured as MASTER (M/S = H), the 7025S15PF asserts BUSYR to block write operations on the SLAVE port during contention. BUSY timing is deterministic: tBAA (BUSY access time from address match) is ≤15 ns, and tBDD (BUSY disable to valid data) is ≤30 ns. This hardware arbitration eliminates software polling and guarantees atomic access - critical for real-time systems where predictability outweighs raw bandwidth.

Can the 7025S15PF be used in a 32-bit data bus configuration?

Yes, the 7025S15PF supports 32-bit expansion via MASTER/SLAVE cascading. Two devices are connected with M/S = H on the MASTER and M/S = L on the SLAVE; BUSYR from MASTER drives BUSYL on SLAVE. This configuration enables full-speed, error-free 32-bit word access without external logic, as confirmed in the functional description and pin configuration diagrams of the IDT DSC 2683/13 datasheet.

What is the purpose of the SEM (semaphore) pins on the 7025S15PF?

The SEML and SEMR pins enable access to eight dedicated hardware semaphore flags used for inter-port synchronization. These flags are written via I/O0 and read across I/O0–I/O15, with addressing controlled by A0–A2. Unlike software-based locking, this on-chip logic provides atomic, glitch-free coordination - essential for deterministic task scheduling in dual-processor or DMA-plus-CPU architectures using the 7025S15PF.