Renesas 70V07L25PFG

Overview

70V07L25PFG from IDT (now Renesas) is a high-speed 32K × 8 true dual-port static RAM with independent left/right ports, 25 ns max access time, 3.3 V single supply, and integrated semaphore/arbiter logic for inter-processor synchronization in real-time embedded systems.

For engineers reviewing the 70V07L25PFG datasheet, 70V07L25PFG pinout, 70V07L25PFG application, or 70V07L25PFG equivalent, this device supports simultaneous asynchronous read/write to shared memory locations, hardware BUSY arbitration, interrupt flag signaling, and master/slave cascading for 16-bit+ data bus expansion - critical for deterministic multi-CPU communication in industrial control and telecom infrastructure.

Technical Context

The 70V07L25PFG implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via BUSY flag assertion based on chip enable and address match timing, not R/W state, ensuring deterministic priority resolution without external logic.

It integrates eight dedicated semaphore registers (addressed by A0–A2) accessible via SEM = VIL mode, enabling atomic claim/release of shared resources between processors. The M/S pin configures BUSYL/BUSYR as output (master) or input (slave), supporting scalable width-expansion arrays with centralized BUSY arbitration.

Key Specifications

Pinout & Package

70V07L25PFG is packaged in an 80-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. All VCC (pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80) and GND (pins 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80) pins must be connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AXC and IS61WV51216BLL-10MLI, the 70V07L25PFG delivers integrated hardware arbitration, 3.3 V operation, and semaphore logic in a single 80-pin package - reducing system-level latency, component count, and firmware development effort for real-time multi-processor designs.

Availability

70V07L25PFG is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, and automotive ADAS sensor fusion nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V07L25PFG 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 high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V07L25PFG belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware-enforced memory coherency is critical.

FAQ

What is the maximum operating frequency supported by the 70V07L25PFG?

The 70V07L25PFG has a 25 ns maximum access time, enabling reliable operation at up to 40 MHz clock rates in synchronous interface configurations. Its fully asynchronous dual-port architecture means each port can operate independently at this speed without mutual timing dependency, provided setup/hold and cycle timing specifications (e.g., tRC = 25 ns, tWC = 25 ns) are met per the datasheet AC characteristics table.

How does the BUSY arbitration logic function in the 70V07L25PFG?

The 70V07L25PFG's BUSY arbitration asserts BUSYL or BUSYR when both ports attempt access to the same memory location within the tAPS setup window (5 ns minimum). In master mode (M/S = VIH), the BUSY pin is an output that gates internal write paths on the contending port. In slave mode (M/S = VIL), BUSY is an input that inhibits writes - enabling scalable width-expansion arrays with centralized arbitration.

Can the 70V07L25PFG operate in a single-port configuration?

Yes, the 70V07L25PFG can operate as a single-port SRAM by tying one port's CE pin high (e.g., CER = VIH) and using only the other port's address, control, and I/O lines. This reduces active power consumption and simplifies interface logic while retaining full 32K × 8 capacity - useful for migration paths or cost-sensitive designs where dual-port capability is not immediately required.

What is the purpose of the SEM pin on the 70V07L25PFG?

The SEM (Semaphore Enable) pin on the 70V07L25PFG selects between main memory array access (SEM = VIH) and eight dedicated semaphore register access (SEM = VIL). When SEM = VIL and CE = VIH, reads/writes to A0–A2 address the semaphore flags - enabling atomic resource locking between processors without consuming main memory space or requiring software intervention.

Does the 70V07L25PFG require external pull-up resistors on BUSY or INT pins?

No, the 70V07L25PFG's BUSY and INT outputs are push-pull (not open-drain), as explicitly stated in the datasheet notes. This eliminates the need for external pull-up resistors on BUSYL, BUSYR, INTL, or INTR pins - simplifying board layout and ensuring fast, rail-to-rail signal transitions without additional components.