Renesas 7025S15PF8

Overview

IDT7025S15PF8 from Integrated Device Technology (IDT) is a high-speed, 8K × 16-bit true dual-port static RAM with 15 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It supports simultaneous independent access from left and right ports, on-chip semaphore arbitration, and battery-backed data retention down to 2V - enabling use in real-time inter-processor communication systems requiring deterministic latency and contention resolution.

For engineers reviewing the IDT7025S15PF8 datasheet, IDT7025S15PF8 pinout, IDT7025S15PF8 application, or IDT7025S15PF8 equivalent, key selection considerations include its 15 ns access timing, dual-port arbitration logic, BUSY/INT flag behavior, byte-selectable I/O control, and 84-pin PLCC package compatibility with legacy military-industrial memory subsystems.

Technical Context

The IDT7025S15PF8 implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses for left (L) and right (R) ports. Its on-chip arbitration logic resolves port contention via BUSY flag assertion (when M/S = H) or BUSY input synchronization (when M/S = L), supporting master/slave cascading for 32-bit+ word expansion.

It integrates full hardware semaphore signaling across eight flags addressed by A0–A2, with dedicated SEM, INTL/INTR, and BUSYL/BUSYR signals. The device operates in three power modes - active (750 mW typ.), standby (5 mW typ.), and full standby (0.2 mA typ.) - enabled by TTL- or CMOS-level CE inputs per port.

Key Specifications

Pinout & Package

Package: 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.12 in × 1.12 in × 0.16 in, lead pitch 0.05 in, RoHS-compliant green variant available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V25S15PF8, the IDT7025S15PF8 uniquely retains 5V TTL compatibility, 84-pin PLCC packaging, and industrial temperature rating - making it the only drop-in solution for maintaining legacy avionics, industrial control, and radar hardware without electrical or mechanical redesign.

Availability

IDT7025S15PF8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, dual-core DSP co-processors, military avionics cross-channel interfaces, and legacy radar signal processor upgrades requiring stable component supply and long-term obsolescence management.

Supply support for IDT7025S15PF8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance computing solutions.

The IDT7025S15PF8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial, military, and telecom infrastructure where latency, reliability, and pin-compatible upgrade paths are critical.

FAQ

What is the maximum operating speed of the IDT7025S15PF8?

The IDT7025S15PF8 has a guaranteed maximum read cycle time (tRC) of 15 ns and address access time (tAA) of 15 ns under commercial conditions. This translates to a theoretical maximum sustained bandwidth of approximately 66.7 MHz for sequential reads, though actual system throughput depends on bus protocol overhead and arbitration latency. The device maintains this timing across its full industrial temperature range (–40°C to +85°C) when operated at 5.0 V ±10%.

Does the IDT7025S15PF8 support battery backup operation?

Yes, the IDT7025S15PF8 supports battery backup operation with guaranteed data retention down to VCC = 2.0 V. In retention mode, the device draws ≤4000 µA (typical 100 µA) while preserving all 128 Kbits of memory content. This feature enables seamless operation during main power failure without external supervisory circuits - a key requirement for industrial controllers and avionics black boxes.

How does port arbitration work on the IDT7025S15PF8?

Port arbitration on the IDT7025S15PF8 is handled entirely in hardware via the BUSY flag and M/S pin configuration. 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 becomes an input used to stall the local write until the master releases contention. The tAPS (arbitration priority setup) parameter of 5 ns ensures deterministic resolution without software intervention.

Can the IDT7025S15PF8 be used in a 32-bit data path configuration?

Yes, the IDT7025S15PF8 supports 32-bit expansion using master/slave cascading. Two devices can be connected with M/S = H on the master and M/S = L on the slave, sharing address and control lines while splitting the 32-bit data bus across their respective I/O0–I/O15 ports. The datasheet confirms this topology enables full-speed, error-free operation without additional discrete logic - a documented design pattern for wide-memory systems.

What is the meaning of the 'PF8' suffix in IDT7025S15PF8?

The 'PF8' suffix in IDT7025S15PF8 denotes the package type and lead finish: 'P' = Plastic Leaded Chip Carrier (PLCC), 'F' = Matte tin lead finish (RoHS-compliant), and '8' = standard 84-pin PLCC body size (1.12 in × 1.12 in). This matches the mechanical specifications in the datasheet's Pin Configurations section and confirms compatibility with industry-standard PLCC sockets and reflow profiles.