Renesas 7025L45PFI8

Overview

7025L45PFI8 from IDT (Integrated Device Technology) is a high-speed 8K × 16-bit true dual-port static RAM with independent left/right ports, 45 ns maximum read cycle time, 2V data retention capability, and industrial temperature range (–40°C to +85°C). 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 7025L45PFI8 datasheet, 7025L45PFI8 pinout, 7025L45PFI8 application, or 7025L45PFI8 equivalent, this device is selected for deterministic port arbitration, on-chip semaphore signaling, battery-backed operation, and TTL-compatible 5V ±10% supply - critical for avionics data buffers, industrial PLC memory modules, and telecom packet switching engines.

Technical Context

The 7025L45PFI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves contention via BUSY flag assertion and supports priority-based access through M/S pin configuration.

It integrates full hardware semaphore support (8 flags addressed by A0–A2), interrupt flag generation (INTL/INTR), and byte-selectable I/O (UBL/LBL, UBR/LBR) for multiplexed bus compatibility. The L-version delivers ultra-low standby current (1 mW typ.) and 2V data retention, distinguishing it from the S-version.

Key Specifications

Pinout & Package

7025L45PFI8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with 0.050" lead pitch and JEDEC MS-026AC footprint. Pin 1 is marked by a corner notch; pins are numbered counter-clockwise starting from the notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-45VC and AS7C38097A-45PCN, the 7025L45PFI8 uniquely combines industrial temperature rating, on-chip semaphore logic, and 2V data retention in an 84-pin PLCC - making it the only drop-in solution for safety-critical, battery-backed, multi-processor embedded systems.

Availability

7025L45PFI8 is available at Aetrix Electronics and suitable for avionics data buffering, industrial PLC memory modules, and telecom packet switching engines requiring stable component supply across extended product lifecycles.

Supply support for 7025L45PFI8 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, now part of Renesas Electronics since 2019.

The IDT7025 family was designed specifically for deterministic, low-latency shared memory in dual-processor and real-time control systems - emphasizing hardware arbitration, battery backup, and industrial reliability over generic SRAM performance.

FAQ

What is the operating temperature range for the 7025L45PFI8?

The 7025L45PFI8 is rated for industrial temperature operation from –40°C to +85°C, validated across all electrical parameters including access time, standby current, and data retention. This range is confirmed in the DC Electrical Characteristics table (Table 09a/b) and explicitly stated in the Recommended Operating Conditions section (Table 05) of the official datasheet.

Does the 7025L45PFI8 support battery backup operation?

Yes, the 7025L45PFI8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum, as specified in Table 10 (Data Retention Characteristics). The L-version's ultra-low standby current (0.2 mA typ. in full standby) enables multi-year retention using standard lithium coin cells or supercapacitors.

How does the M/S pin configure arbitration behavior in the 7025L45PFI8?

When M/S = H, the left port operates as MASTER with BUSYL asserted as an output flag during contention; when M/S = L, the left port becomes SLAVE with BUSYL configured as an input. This pin directly selects the arbitration topology - no external logic is needed to implement master/slave cascading for 32-bit+ systems.

What is the function of the SEM pins on the 7025L45PFI8?

The SEML and SEMR pins enable access to the on-chip semaphore register bank (8 flags). When SEM = VIH, normal RAM access occurs; when SEM = VIL, the I/O bus maps to semaphore flags addressed by A0–A2. This hardware mechanism provides atomic test-and-set operations essential for multi-processor synchronization without software intervention.

Is the 7025L45PFI8 pin-compatible with other IDT7025 variants like the 7025S45PFI8?

Yes, the 7025L45PFI8 shares identical pinout, package (84-pin PLCC), and functional interface with all IDT7025X45 variants including the 7025S45PFI8. The only differences are internal power optimization (L-version achieves 1 mW standby vs. 5 mW for S-version) and data retention capability - both are drop-in replacements in the same footprint.