Renesas 7025L20PFI

Overview

7025L20PFI from IDT (Integrated Device Technology) is a high-speed, 8K × 16-bit true dual-port static RAM with independent left/right ports, 20 ns max read cycle time, industrial temperature range (–40°C to +85°C), and 1 mW typical standby power. 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 7025L20PFI datasheet, 7025L20PFI pinout, 7025L20PFI application, or 7025L20PFI equivalent, key selection considerations include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH/VIL, semaphore flag support (8 flags via A0–A2), battery backup data retention at 2 V, and compatibility with TTL-level 5 V ±10% supply.

Technical Context

The 7025L20PFI implements fully asynchronous dual-port operation with on-chip arbitration logic that resolves port contention via hardware BUSY flag assertion-either as output (Master) or input (Slave)-based on M/S pin state. Its semaphore subsystem uses dedicated SEM pins and A0–A2 addressing to manage eight shared resource flags without external logic.

It supports two distinct access modes: RAM mode (CE = VIL, UB/LB = VIL, SEM = VIH) and semaphore mode (CE = VIH or UB&LB = VIH, SEM = VIL), each with separate AC timing requirements. Port-to-port delay (tWDD ≤ 45 ns, tDDD ≤ 35 ns) and BUSY propagation (tBAA ≤ 20 ns) are guaranteed across the industrial temperature range.

Key Specifications

Pinout & Package

7025L20PFI is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, designated by the 'PFI' suffix. The package is leaded, surface-mountable, and features a 1.15 in × 1.15 in body size with J-lead configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and IDT70V25L20PF, the 7025L20PFI uniquely supports 5 V TTL compatibility, 2 V data retention, and 84-pin PLCC packaging-making it the only option for legacy industrial backplanes requiring 5 V signaling and battery-backed hold mode.

Availability

7025L20PFI is available at Aetrix Electronics and suitable for real-time motion control, redundant safety PLCs, and avionics data concentrators requiring stable component supply, long-term obsolescence mitigation, and industrial temperature assurance.

Supply support for 7025L20PFI 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 since 2019.

The IDT7025 product line delivers true dual-port SRAMs optimized for deterministic inter-processor communication in industrial automation, aerospace, and test equipment-designed to eliminate software arbitration overhead and guarantee sub-20 ns memory access.

FAQ

What is the maximum operating temperature range for the 7025L20PFI?

The 7025L20PFI is rated for industrial temperature operation from –40°C to +85°C. All DC and AC electrical specifications-including 20 ns read cycle time, 1 mW standby current, and BUSY arbitration timing-are guaranteed across this full range. This makes the 7025L20PFI suitable for deployment in harsh environments such as factory floor controllers and outdoor telecommunications equipment.

Does the 7025L20PFI support battery backup operation, and what voltage is required?

Yes, the 7025L20PFI supports battery backup data retention at VCC = 2.0 V minimum, as specified in Table 10 of the datasheet. At this voltage, it maintains valid memory contents with ICCDR ≤ 4000 µA (military/industrial grade). This feature enables seamless operation during main power interruption without external capacitors or supercaps-critical for safety-critical hold functionality in the 7025L20PFI.

How does the M/S pin affect BUSY signal behavior in the 7025L20PFI?

In the 7025L20PFI, the M/S pin configures BUSY as either output (M/S = H, Master mode) or input (M/S = L, Slave mode). In Master mode, BUSY asserts to indicate port contention; in Slave mode, BUSY must be driven externally to gate writes. This dual-role design enables flexible master/slave cascading-essential for building wider memory buses while preserving timing determinism in the 7025L20PFI.

Can the 7025L20PFI perform simultaneous reads and writes to the same memory location?

Yes, the 7025L20PFI supports true simultaneous access to the same memory location: one port may read while the other writes. When contention occurs, on-chip arbitration asserts BUSY on the later-arriving port, and valid data appears after tBDD ≤ 30 ns (at 20 ns speed grade). This capability is fundamental to the 7025L20PFI's role in real-time inter-processor synchronization without software locks.

What package type does the 'PFI' suffix indicate for the 7025L20PFI?

For the 7025L20PFI, the 'PFI' suffix denotes an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-leads, RoHS-compliant finish, and 1.15 in × 1.15 in body size. This package is surface-mountable, rework-friendly, and widely supported in industrial PCB assembly-distinguishing the 7025L20PFI from PGA (PLG), Flatpack (FP), or TQFP (PNG) variants of the same family.