Renesas 7005L15PFG8

Overview

7005L15PFG8 from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 15 ns maximum read cycle time (commercial grade), 5 V single-supply operation, and integrated hardware semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7005L15PFG8 datasheet, 7005L15PFG8 pinout, 7005L15PFG8 application, or 7005L15PFG8 equivalent, this device supports simultaneous asynchronous access to shared memory, battery-backed data retention down to 2 V, and master/slave cascading for 16-bit+ bus expansion without external logic.

Technical Context

The 7005L15PFG8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling concurrent reads/writes-even to the same location-via on-chip arbitration. BUSY and interrupt flags provide deterministic contention resolution.

It integrates dedicated semaphore enable (SEML/SEMR), interrupt set/reset (INTL/INTR), and master/slave select (M/S) logic to coordinate multi-processor access. The low-power L-version draws only 1 mW typical standby current and retains data at 2 V, supporting backup power operation.

Key Specifications

Pinout & Package

7005L15PFG8 is housed in a 64-pin TQFP (PNG64) package measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. All VCC and GND pins must be decoupled locally per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15ZXC and R1EX24064ASAS-15, the 7005L15PFG8 delivers hardware-enforced dual-port concurrency, integrated semaphore registers, and 2 V data retention - features absent in both alternatives - making it uniquely suitable for safety-critical, real-time inter-processor communication where timing predictability is mandatory.

Availability

7005L15PFG8 is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and guaranteed commercial-grade performance.

Supply support for 7005L15PFG8 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 high-performance silicon solutions, now part of Renesas Electronics since 2019.

The IDT7005 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems - emphasizing hardware arbitration, semaphore support, and battery-backed operation over raw density or cost-per-bit.

FAQ

What is the maximum operating temperature range for the 7005L15PFG8?

The 7005L15PFG8 is rated for commercial temperature operation from 0°C to +70°C. While the broader IDT7005L family offers industrial (–40°C to +85°C) and military variants, the '15' speed grade and 'PFG8' package code specifically denote the commercial-grade version. This is confirmed by the datasheet's "Maximum Operating Temperature and Supply Voltage" table and ordering information section.

Does the 7005L15PFG8 support true simultaneous read operations from both ports to the same memory address?

Yes, the 7005L15PFG8 uses true dual-port memory cells that allow simultaneous reads - even to identical addresses - without contention, arbitration delay, or data corruption. This capability is explicitly stated in the "Features" section and verified by the functional block diagram showing independent I/O paths and the absence of BUSY assertion during concurrent reads.

How does the M/S pin affect BUSY signal behavior on the 7005L15PFG8?

When M/S = H, the 7005L15PFG8 operates as a master: BUSYL and BUSYR are push-pull outputs indicating port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when asserted low. This dual-mode behavior is defined in the Pin Names table and Truth Table I notes, and enables flexible master/slave cascading for wider data buses.

Can the 7005L15PFG8 retain data when powered solely by a 2 V backup battery?

Yes, the 7005L15PFG8 guarantees data retention at VCC = 2.0 V, as specified in the "Data Retention Characteristics" table (VDR = 2.0 V min). This is a key differentiator of the 'L' (low-power) variant and is validated by the Data Retention Waveform figure and associated timing parameters (tCDR, tR), which apply specifically to the L-version.

What is the function of the SEM pins on the 7005L15PFG8, and how are they used?

SEML and SEMR enable the on-chip 8-bit semaphore register. When SEM = L and CE = H, the device enters semaphore mode: A0–A2 select one of eight flags, and I/O0 writes the flag while I/O0–I/O7 read its state. This hardware mechanism provides atomic set/clear operations for resource locking between processors, eliminating software race conditions - a capability documented in Truth Table II and the Semaphore Read/Write Control section.