Renesas 7005L55PF8

Overview

7005L55PF8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 55 ns max read cycle time (tRC), 2V data retention capability, and full on-chip semaphore/interrupt/arbitration logic - used in real-time embedded systems requiring concurrent memory access, such as industrial motion controllers and avionics data buffers.

For engineers reviewing the 7005L55PF8 datasheet, 7005L55PF8 pinout, 7005L55PF8 application, or 7005L55PF8 equivalent, key selection considerations include its 64-pin TQFP package, dual 13-bit address buses (A0L–A12L / A0R–A12R), TTL-compatible 5V ±10% supply, and master/slave configuration via M/S pin for 16-bit+ bus expansion.

Technical Context

The 7005L55PF8 implements fully asynchronous dual-port operation with separate control, address, and I/O pins per port, enabling simultaneous non-contention reads of identical memory locations. Its on-chip arbitration logic resolves port conflicts using BUSY flag timing (tBAA ≤ 45 ns) and priority setup (tAPS = 5 ns), while semaphore signaling supports eight hardware flags addressed by A0–A2.

It features two distinct access modes: RAM mode (CE = VIL, SEM = VIH) and semaphore mode (CE = VIH, SEM = VIL), with dedicated interrupt flag generation (INTL/INTR) triggered by writes to addresses 1FFFh (set) or 1FFEh (clear). Data retention operates at 2V with ICCDR ≤ 4000 µA across military temperature range.

Key Specifications

Pinout & Package

64-pin thin quad flatpack (TQFP) with 0.5 mm pitch; body dimensions 14 mm × 14 mm × 1.4 mm; lead finish matte tin; RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-55JC and AS7C38095B-55PCN, the 7005L55PF8 delivers integrated arbitration, semaphore, and interrupt logic in a single die - reducing system-level complexity, eliminating external glue logic, and enabling guaranteed deterministic behavior in safety-critical MIL-STD-810G environments.

Availability

7005L55PF8 is available at Aetrix Electronics and suitable for industrial motion control, aerospace data buffering, telecom line card arbitration, and military radar signal processing requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for 7005L55PF8 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 was designed specifically for real-time embedded systems requiring deterministic dual-port memory access - targeting avionics, industrial automation, and defense electronics where concurrent read/write, hardware arbitration, and extended temperature operation are mandatory.

FAQ

What is the maximum operating temperature range supported by the 7005L55PF8?

The 7005L55PF8 is qualified for the military temperature range of −55°C to +125°C per MIL-PRF-38535 QML, making it suitable for harsh-environment applications including airborne, ground vehicle, and naval systems where thermal stability is critical. This rating applies across all electrical specifications including tRC = 55 ns and data retention at 2V.

Does the 7005L55PF8 support true simultaneous read operations from both ports to the same memory address?

Yes, the 7005L55PF8 implements true dual-ported memory cells that allow simultaneous reads of the identical memory location from left and right ports without contention or arbitration delay. This capability is inherent to the silicon architecture and does not require external logic or timing coordination - confirmed in the functional block diagram and Truth Table I.

How does the M/S pin affect BUSY signal behavior in the 7005L55PF8?

When M/S = H, the 7005L55PF8 operates as a master: BUSYL and BUSYR are push-pull outputs asserting busy status during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device - enabling hierarchical arbitration in multi-device 16-bit+ memory systems.

What is the purpose of the SEM pin in the 7005L55PF8, and how is it used?

The SEM (semaphore enable) pin selects between RAM mode (SEM = VIH) and semaphore mode (SEM = VIL). In semaphore mode, writes to I/O0 and reads from I/O0–I/O7 access eight hardware semaphore flags addressed by A0–A2 - providing atomic lock/unlock primitives without CPU intervention or software overhead.

Can the 7005L55PF8 retain data during main power loss, and what voltage is required?

Yes, the 7005L55PF8 supports battery backup operation with guaranteed data retention at VCC = 2.0 V minimum across the full military temperature range (−55°C to +125°C). In this mode, ICCDR is specified at ≤4000 µA, enabling long-term hold using small coin-cell batteries or supercapacitors in mission-critical systems.