Renesas 7007L55PF8

Overview

IDT7007L55PF8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 55 ns read/write cycle time, TTL-compatible 5V ±10% operation, and integrated hardware semaphore and interrupt logic - used in real-time inter-processor communication systems such as industrial PLCs and telecom line cards.

For engineers reviewing the IDT7007L55PF8 datasheet, IDT7007L55PF8 pinout, IDT7007L55PF8 application, or IDT7007L55PF8 equivalent, key selection considerations include its 80-pin TQFP package, master/slave arbitration capability, BUSY flag timing (tBDD ≤ 40 ns), and dual-port power-down control via CE pins for low-power embedded multiprocessing.

Technical Context

The IDT7007L55PF8 implements fully asynchronous dual-port access with separate address, data, and control lines per port, enabling simultaneous reads from the same memory location without contention. Its on-chip arbitration logic resolves port conflicts using BUSY signaling with priority set-up time tAPS = 5 ns.

It supports two distinct memory access modes: standard RAM access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), with dedicated INTL/INTR flags triggered by writes to fixed addresses 7FFE_H and 7FFF_H. The M/S pin configures master (BUSY output) or slave (BUSY input) behavior for cascaded 16-bit+ systems.

Key Specifications

Pinout & Package

Package: 80-pin Thin Quad Flat Pack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and R1EX24032AS055S, the IDT7007L55PF8 delivers integrated arbitration, semaphore, and interrupt logic in a single 80-pin package - reducing PCB area, component count, and firmware complexity for real-time multiprocessing systems.

Availability

IDT7007L55PF8 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and avionics applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for IDT7007L55PF8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, and RF solutions for high-performance computing and communications.

The IDT7007 family was designed specifically for deterministic inter-processor communication in real-time embedded systems, emphasizing hardware-enforced coherency, low-latency arbitration, and industrial-grade reliability.

FAQ

What is the maximum operating frequency supported by the IDT7007L55PF8?

The IDT7007L55PF8 supports a maximum sustained read/write throughput of 18.2 MHz per port, derived from its 55 ns read cycle time (tRC). This is not a clock frequency specification but a data rate limit under worst-case timing conditions; actual system clocking depends on controller interface design and setup/hold margins.

Does the IDT7007L55PF8 require external pull-up resistors on BUSY or INT pins?

No. The IDT7007L55PF8 features push-pull BUSYL/BUSYR and INTL/INTR outputs (per datasheet Note 2 on page 2), eliminating the need for external pull-ups. These pins drive actively HIGH or LOW and are not open-drain - unlike many legacy dual-port SRAMs.

How does the M/S pin affect the BUSY signal behavior in the IDT7007L55PF8?

When M/S = HIGH, the IDT7007L55PF8 operates as a master: BUSYL and BUSYR become push-pull outputs that assert LOW to block writes during port contention. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs that must be driven LOW by an external master to inhibit local writes - enabling hierarchical arbitration in multi-device systems.

Can the IDT7007L55PF8 be used in a single-port configuration?

Yes. Either port (left or right) can be used independently by tying unused control signals (e.g., CER, OER, R/WR) to inactive states. The IDT7007L55PF8 retains full functionality as a 32K × 8 SRAM with standard CE/OE/RW interface - though hardware semaphore, interrupt, and BUSY features require both ports to be active and properly configured.

What is the power consumption difference between active and standby modes for the IDT7007L55PF8?

In dynamic operation (both ports active), the IDT7007L55PF8 draws 150 mA typical (750 mW at 5 V). In full standby (ISB3 mode), with both CE pins HIGH and all inputs at valid CMOS levels, it consumes just 1.0 mA typical (5 mW) - a 150× reduction ideal for power-gated subsystems in battery-backed or energy-sensitive designs.