Renesas 70V07L55G

Overview

70V07L55G from IDT (Integrated Device Technology) is a high-speed 32K × 8 true dual-port static RAM with independent left/right ports, 55 ns maximum access time (commercial grade), 3.3 V single-supply operation, and integrated semaphore/INT/BUSY arbitration logic - used in real-time interprocessor communication systems requiring concurrent memory access without software coordination.

For engineers reviewing the 70V07L55G datasheet, 70V07L55G pinout, 70V07L55G application, or 70V07L55G equivalent, key selection criteria include dual-port arbitration timing (tBDD ≤ 50 ns), ultra-low standby current (660 µW typ.), master/slave cascading capability via M/S pin, and 80-pin TQFP packaging for high-density embedded control designs.

Technical Context

The 70V07L55G implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port - enabling simultaneous read/write to any memory location without contention-induced latency penalties. Its on-chip arbitration logic resolves port conflicts using BUSY flag assertion based on chip enable and address match timing (tAPS = 5 ns).

It integrates three hardware coherency mechanisms: semaphore registers (8 flags, addressed by A0–A2), interrupt flags (INTL/INTR tied to fixed addresses 7FFEh/7FFFh), and push-pull BUSY outputs (BUSYL/BUSYR) that function as output (master) or input (slave) depending on M/S pin state - eliminating need for external glue logic in multiprocessor shared-memory systems.

Key Specifications

Pinout & Package

70V07L55G is packaged in an 80-pin thin quad flatpack (TQFP) with exposed thermal pad. All VCC pins require local 3.3 V decoupling; all GND pins must be connected to solid ground plane for signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-55AXC and IDT70V25L55PF8, the 70V07L55G delivers integrated semaphore arbitration and push-pull BUSY outputs in a thermally optimized 80-pin TQFP - reducing system-level complexity and improving determinism in real-time interprocessor communication.

Availability

70V07L55G is available at Aetrix Electronics and suitable for industrial PLC communication modules, DSP-FPGA co-processing interfaces, telecom line card buffers, and avionics health monitoring systems requiring stable component supply and long-term obsolescence management.

Supply support for 70V07L55G 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 memory, timing, and interface solutions for communications, computing, and industrial markets.

The 70V07L55G belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic interprocessor communication in real-time embedded systems where hardware-coordinated memory access eliminates software overhead.

FAQ

What is the maximum operating frequency supported by the 70V07L55G?

The 70V07L55G does not operate at a clock frequency - it is an asynchronous static RAM. Its 55 ns access time defines the minimum read/write cycle duration (tRC ≥ 55 ns). For example, a 55 ns tRC corresponds to a theoretical maximum throughput of ~18.2 million operations per second per port, assuming ideal bus loading and no wait states.

How does the M/S pin affect BUSY pin behavior in the 70V07L55G?

When M/S = VIH, the 70V07L55G operates as a master: BUSYL and BUSYR are push-pull outputs that indicate port contention. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven LOW by a master device - enabling scalable width expansion without external logic.

Can the 70V07L55G be used in industrial temperature environments?

No - the 70V07L55G is rated for commercial temperature range only (0°C to +70°C). For industrial applications (−40°C to +85°C), the IDT70V07S35G or IDT70V07L35G variants with 35 ns speed grade must be selected, as confirmed in the Absolute Maximum Ratings table and ordering information section of the datasheet.

What is the purpose of the SEM pin on the 70V07L55G?

The SEM pin (Semaphore Enable) selects between RAM array access (SEM = VIH) and semaphore register access (SEM = VIL). When SEM = VIL and CE = VIH, the 70V07L55G routes A0–A2 to eight dedicated binary semaphore flags - allowing atomic claim/release of shared resources without affecting main memory contents.

Does the 70V07L55G support 16-bit data bus expansion?

Yes - the 70V07L55G supports 16-bit (or wider) expansion using master/slave configuration. One device is configured as master (M/S = VIH) to generate BUSY signals; others as slaves (M/S = VIL) use those signals to gate writes. This avoids external arbitration logic and maintains full-speed operation across the expanded bus width.