Renesas 7025L20PFI8

Overview

7025L20PFI8 from IDT is a high-speed 8K × 16 (128 Kbit) true dual-port static RAM with independent asynchronous left/right ports, 20 ns max read cycle time, 1 mA typical standby current, TTL-compatible 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It enables simultaneous 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 7025L20PFI8 datasheet, 7025L20PFI8 pinout, 7025L20PFI8 application, or 7025L20PFI8 equivalent, key selection considerations include dual-port arbitration timing (tBAA ≤ 20 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 84-pin PLCC packaging for legacy industrial PCB layouts.

Technical Context

The 7025L20PFI8 implements full hardware port arbitration with dedicated BUSY output (master) or input (slave), enabling deterministic conflict resolution during simultaneous access. Its on-chip semaphore logic supports eight independent flags accessed via I/O0–I/O15 using address lines A0–A2, with tSWRD = 5 ns write-to-read latency.

It operates fully asynchronously from either port, with separate CE/R/W/OE/UB/LB controls per side and independent power-down via chip enable. The L-version achieves ultra-low standby current (1 µA typical at CMOS-level inputs) while maintaining 2 V data retention-critical for battery-backed systems requiring nonvolatile SRAM behavior without external backup circuitry.

Key Specifications

Pinout & Package

7025L20PFI8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, body size ≈ 1.12 in × 1.12 in × 0.16 in, and lead finish matte tin. Pin 1 is marked by a corner notch; orientation follows standard PLCC top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362V-20AXI and IDT70V25L20PF, the 7025L20PFI8 uniquely combines 5 V TTL compatibility, 84-pin PLCC packaging, 20 ns speed, and 2 V data retention-making it the sole drop-in replacement for legacy industrial systems requiring all four attributes.

Availability

7025L20PFI8 is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics displays, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for 7025L20PFI8 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics since 2019.

The IDT7025 family was designed specifically for deterministic real-time embedded systems requiring hardware-coordinated dual-processor memory sharing-targeting industrial automation, aerospace, and communications infrastructure.

FAQ

What is the maximum operating temperature range for the 7025L20PFI8?

The 7025L20PFI8 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's "Recommended DC Operating Conditions" table and applies to all AC and DC specifications including 20 ns timing, 1 µA standby current, and 2 V data retention. It is not qualified for military-grade –55°C to +125°C operation.

Does the 7025L20PFI8 support true simultaneous read access to the same memory address from both ports?

Yes, the 7025L20PFI8 implements true dual-port memory cells that allow concurrent reads from identical addresses on left and right ports without contention or arbitration delay. This capability is explicitly stated in the "Features" section and confirmed by the functional block diagram showing independent address decoders and I/O controls per port.

How does the BUSY signal behave on the 7025L20PFI8 when configured as a slave?

When M/S = L (slave configuration), BUSYR and BUSYL become inputs-not outputs. The slave device monitors the master's BUSY output to stall its own write operations during address contention. This behavior is defined in Note 1 of the Functional Block Diagram and verified in Truth Table II and the "BUSY TIMING (M/S = VIL)" section of the AC specs.

Can the 7025L20PFI8 retain data at 2.0 V, and what is the typical current draw in that mode?

Yes, the 7025L20PFI8 supports data retention at VCC = 2.0 V, with typical ICCDR = 100 µA and maximum 4000 µA across military and industrial grades. This is specified in Table 10 ("Data Retention Characteristics") and enabled automatically when CE is deasserted and VCC drops to 2 V-no external control signals required.

What package type does the 'PFI8' suffix indicate for the 7025L20PFI8?

The 'PFI8' suffix denotes an 84-pin Plastic Leaded Chip Carrier (PLCC) package with standard J-lead geometry and pin 1 identified by a corner notch. This matches the "84-Pin PLCC/Flatpack Top View" diagram on page 2 of the datasheet and is distinct from the PGA (GU84), Flatpack (FP84), or TQFP (PNG100) variants.