Renesas 7006S55J8

Overview

IDT7006S55J8 from Integrated Device Technology (IDT) is a high-speed 16K × 8 dual-port static RAM with true independent left/right port access, 55 ns maximum read cycle time, TTL-compatible 5 V ±10% supply, and integrated on-chip semaphore and arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7006S55J8 datasheet, IDT7006S55J8 pinout, IDT7006S55J8 application, or IDT7006S55J8 equivalent, this device supports simultaneous asynchronous reads/writes across ports, provides BUSY/INT/SEM flags for deterministic resource sharing, and delivers low-power standby operation (1 mA typ.) ideal for military-grade avionics data buffers and dual-CPU industrial controllers.

Technical Context

The IDT7006S55J8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling concurrent access without external logic. Its on-chip arbitration resolves contention via M/S-selectable master/slave BUSY signaling and priority set-up timing (tAPS = 5 ns).

It supports two distinct memory access modes: standard RAM access (CE = VIL, SEM = VIH) and semaphore flag access (CE = VIH, SEM = VIL), with dedicated A0–A2 addressing of eight semaphore registers and guaranteed tSWRD ≤ 5 ns write-to-read latency for synchronization primitives.

Key Specifications

Pinout & Package

Package: 68-pin ceramic PGA (GU68), body size ≈ 1.18 in × 1.18 in × 0.16 in; requires all VCC pins connected to 5 V supply and all GND pins tied to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and AS7C316000B-55JCIN, the IDT7006S55J8 uniquely integrates full hardware semaphore, BUSY arbitration, and 2 V data retention in a 5 V TTL-compatible 68-pin PGA package - making it irreplaceable for legacy military and avionics designs requiring drop-in compatibility and deterministic real-time behavior.

Availability

IDT7006S55J8 is available at Aetrix Electronics and suitable for avionics flight control buffers, industrial dual-PLC data exchange, and military radar signal processing requiring stable component supply across extended product lifecycles.

Supply support for IDT7006S55J8 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

Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The IDT7006 family was designed specifically for high-reliability dual-processor systems requiring deterministic, hardware-managed shared memory - targeting aerospace, defense, and industrial automation applications demanding MIL-qualified components.

FAQ

What is the maximum operating temperature range certified for the IDT7006S55J8?

The IDT7006S55J8 is rated for −55°C to +125°C ambient operation and manufactured per MIL-PRF-38535 QML Class B standards. This qualification ensures reliability in extreme environments such as aircraft engine bays, missile guidance sections, and downhole oilfield equipment where thermal cycling and long-term stability are mission-critical. The IDT7006S55J8 maintains full functionality across this range without derating.

Does the IDT7006S55J8 support true simultaneous read operations on both ports to the same memory address?

Yes, the IDT7006S55J8 features true dual-ported memory cells that permit concurrent reads from identical addresses on left and right ports without contention or data corruption. This capability is intrinsic to its silicon architecture - no external arbitration or timing constraints are required. The IDT7006S55J8 guarantees valid output on both ports within tAA ≤ 55 ns after address assertion, enabling lock-free data broadcasting in real-time systems.

How does the M/S pin configure BUSY functionality in the IDT7006S55J8?

When M/S = HIGH, the IDT7006S55J8 operates as a Master: BUSYL and BUSYR become push-pull outputs that assert automatically during port contention. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that accept BUSY signals from a Master device. This configuration enables scalable MASTER/SLAVE cascading for wider data buses - the IDT7006S55J8 uses this to support 16-bit or broader word systems without external logic.

What is the minimum supply voltage required to retain data in the IDT7006S55J8 during power loss?

The IDT7006S55J8 guarantees data retention down to 2.0 V (VDR = 2.0 V min.), as specified in Table 9 of its datasheet. At this voltage, the device draws ≤4000 µA in military grade and ≤1500 µA in commercial grade, enabling reliable operation from backup batteries or supercapacitors. This 2 V retention threshold is a hard specification - not a typical value - and applies across the full −55°C to +125°C temperature range for the IDT7006S55J8.

Can the IDT7006S55J8 be used in semaphore-only mode without accessing the main RAM array?

Yes, the IDT7006S55J8 supports dedicated semaphore register access by setting CE = VIH and SEM = VIL - decoupling semaphore operations from main memory access. In this mode, A0–A2 select one of eight semaphore flags, and I/O0–I/O7 perform read/write cycles with tSOP = 10 ns pulse width and tSWRD ≤ 5 ns write-to-read latency. This allows lightweight inter-processor signaling without disturbing RAM contents - a capability confirmed in Truth Table II and Timing Diagram 11 for the IDT7006S55J8.