Renesas 7005S25PF

Overview

7005S25PF from IDT is a high-speed 8K × 8 dual-port static RAM with true simultaneous read access on both ports, 25 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% operation, and integrated semaphore/arbiter logic for inter-port coordination - used in real-time embedded systems requiring deterministic memory coherency between two independent processors or DMA channels.

For engineers reviewing the 7005S25PF datasheet, 7005S25PF pinout, 7005S25PF application, or 7005S25PF equivalent, key selection considerations include its master/slave BUSY arbitration behavior, semaphore flag timing (tSOP = 10 ns), interrupt flag setup/reset latency (tINS/tINR ≤ 20 ns), and compatibility with 64-pin TQFP layout in industrial temperature (-40°C to +85°C) designs.

Technical Context

The 7005S25PF implements fully asynchronous dual-port architecture with separate address, data, and control buses for left and right ports. It supports concurrent reads from identical memory locations without contention, while write arbitration uses hardware-based BUSY signaling triggered by address match or chip enable assertion.

Its on-chip semaphore logic enables eight shared flags accessed via A0–A2 and I/O0–I/O7, with dedicated SEM pins and tSWRD = 5 ns write-to-read latency. The M/S pin configures port role: when high, BUSYL/BUSYR are outputs indicating local port busy state; when low, BUSYL/BUSYR become inputs that gate writes on the slave port.

Key Specifications

Pinout & Package

7005S25PF is housed in a 64-pin TQFP (PNG64) package with 0.5 mm pitch, thermally enhanced for industrial ambient operation. Pin functions are strictly segregated between left and right ports, with no shared address or data lines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-25AXC and IDT70V25S25PF, the 7005S25PF uniquely retains 5 V TTL compatibility, industrial temperature guarantee at full speed, and native support for legacy 5 V controller interfaces - making it the only drop-in replacement for existing 7005-based designs requiring no PCB or voltage rail changes.

Availability

7005S25PF is available at Aetrix Electronics and suitable for motor control systems, avionics data concentrators, and industrial PLC communication modules requiring stable component supply across extended product lifecycles.

Supply support for 7005S25PF 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.

The IDT7005 family was designed specifically for deterministic real-time embedded systems requiring hardware-coordinated memory access between two independent processing domains - targeting aerospace, industrial automation, and digital signal processing applications.

FAQ

What is the maximum operating frequency supported by the 7005S25PF?

The 7005S25PF supports a maximum read cycle time (tRC) of 25 ns, corresponding to a theoretical 40 MHz sustained operation per port. This timing is guaranteed across the full industrial temperature range (-40°C to +85°C) with 5.0 V ±10% supply. Actual system frequency depends on board layout, signal integrity, and control timing margins - especially tAS (address setup) and tWP (write pulse width), both specified at 0 ns min and 20 ns max for the 25 ns speed grade.

Does the 7005S25PF support battery backup for data retention?

No - the 7005S25PF is the standard-power variant ('S') and does not support battery backup data retention. Only the 'L' suffix variants (e.g., 7005L25PF) provide 2 V data retention capability with ISB3 ≤ 0.2 mA. The 7005S25PF has typical standby current of 16 mA (ISB1) and requires continuous 5 V supply to maintain memory contents.

How does the M/S pin affect BUSY signal behavior in the 7005S25PF?

When M/S = HIGH, the 7005S25PF operates as a master: BUSYL and BUSYR are push-pull outputs reflecting local port arbitration status. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that must be driven high by an external master to enable writes. This configuration allows daisy-chained master/slave pairs for wider data buses without external logic.

Can the 7005S25PF perform simultaneous read and write operations on the same memory location?

No - the 7005S25PF permits simultaneous reads from the same address on both ports, but simultaneous read/write to the same location triggers hardware arbitration. If both ports attempt access concurrently, the BUSY signal asserts to block the lower-priority port (determined by tAPS setup time), preventing data corruption. True simultaneous R/W to identical addresses is not supported.

What package type is used for the 7005S25PF and what are its mechanical dimensions?

The 7005S25PF uses a 64-pin thin quad flatpack (TQFP) package designated PNG64, with body dimensions of 14 mm × 14 mm × 1.4 mm and 0.5 mm lead pitch. This RoHS-compliant package features exposed thermal pad and is optimized for reflow soldering in industrial PCB assemblies.