Renesas 7005L20PFI8

Overview

7005L20PFI8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right port access, 20 ns max read cycle time (tRC), industrial temperature range (−40°C to +85°C), and 1 mW typical standby power. It enables simultaneous asynchronous reads/writes across ports in real-time embedded systems requiring deterministic memory arbitration-such as digital signal processors interfacing with FPGA co-processors.

For engineers reviewing the 7005L20PFI8 datasheet, 7005L20PFI8 pinout, 7005L20PFI8 application, or 7005L20PFI8 equivalent, key selection criteria include BUSY/INT semaphore timing (tBDD ≤ 30 ns), M/S-configurable master/slave cascading for 16-bit+ bus expansion, and battery-backed data retention at 2 V.

Technical Context

The 7005L20PFI8 implements fully asynchronous dual-port architecture with on-chip arbitration logic that resolves contention via address-match or CE-controlled BUSY assertion. Its two independent ports feature separate A0–A12, I/O0–I/O7, CE/R/W/OE, and SEM/INT/BUSY signals-enabling concurrent access without external glue logic.

It supports both RAM mode (CE = L, SEM = H) and semaphore mode (CE = H, SEM = L), with eight hardware semaphores addressed by A0–A2. The M/S pin configures BUSYL/BUSYR as output (master) or input (slave), enabling multi-device synchronization in shared-memory systems.

Key Specifications

Pinout & Package

64-pin thin quad flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant green package.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and AS7C38098B-20JCIN, the 7005L20PFI8 uniquely delivers industrial temperature operation, integrated semaphore hardware, M/S-configurable cascading, and 2 V data retention - making it the only drop-in solution for deterministic real-time embedded memory bridges.

Availability

7005L20PFI8 is available at Aetrix Electronics and suitable for motor control systems, digital signal processor interfaces, industrial PLC backplanes, and radar signal processing modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005L20PFI8 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 product line delivers true dual-port SRAMs optimized for real-time embedded systems requiring deterministic arbitration, low-latency inter-processor communication, and industrial reliability - with variants spanning commercial, industrial, and military temperature grades.

FAQ

What is the maximum operating frequency supported by the 7005L20PFI8?

The 7005L20PFI8 has a 20 ns maximum read cycle time (tRC), enabling reliable operation at up to 50 MHz in systems where address and control setup/hold times are met. Its fully asynchronous design means no internal clock is required - timing depends solely on external signal propagation and specified AC parameters like tAA and tACE.

Does the 7005L20PFI8 support battery backup operation?

Yes, the 7005L20PFI8 supports battery backup with data retention down to 2 V VCC (VDR = 2.0 V). In data retention mode, ICCDR is guaranteed ≤ 4000 µA across military/industrial grades, allowing sustained memory hold during main power failure using a small backup cell.

How does the M/S pin affect BUSY signal behavior on the 7005L20PFI8?

When M/S = H, the 7005L20PFI8 operates as a master: BUSYL and BUSYR are push-pull outputs that assert LOW during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that must be driven LOW by a master device to inhibit writes - enabling hierarchical multi-RAM arbitration.

Can the 7005L20PFI8 perform simultaneous reads from both ports to the same memory location?

Yes, the 7005L20PFI8 uses true dual-port memory cells that allow simultaneous reads from both left and right ports to the same address without contention, corruption, or additional timing penalties - a key differentiator from pseudo-dual-port or pipelined SRAMs.

What are the valid interrupt address locations for setting and clearing INTL/INTR on the 7005L20PFI8?

INTL is set by writing to address 1FFEh on the right port and cleared by writing to 1FFFh on the right port. INTR is set by writing to 1FFFh on the left port and cleared by writing to 1FFEh on the left port - per Truth Table III in the official datasheet.