Renesas 70V07L35PF

Overview

70V07L35PF from IDT (now Renesas) is a high-speed 32K × 8 true dual-port static RAM with independent left/right ports, 35 ns max access time (industrial grade), 3.3 V ±0.3 V single supply, and integrated semaphore/arbiter logic for inter-processor synchronization in real-time embedded systems.

For engineers reviewing the 70V07L35PF datasheet, 70V07L35PF pinout, 70V07L35PF application, or 70V07L35PF equivalent, key selection criteria include BUSY arbitration timing (tBDD ≤ 40 ns), ultra-low standby current (660 µW typ.), dual-port interrupt flag support (INTL/INTR), and compatibility with Master/Slave cascading for 16-bit+ data bus expansion.

Technical Context

The 70V07L35PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port - enabling simultaneous read/write to any memory location without internal contention. Its on-chip arbitration logic resolves port-to-port conflicts via push-pull BUSY flags (BUSYL/BUSYR), while semaphore logic (SEML/SEMR) provides eight hardware binary flags accessible via A0–A2 for resource locking between processors.

It supports two distinct operational modes: RAM mode (CE = VIL, SEM = VIH) for standard 32K × 8 memory access, and semaphore mode (CE = VIH, SEM = VIL) for atomic flag read/write using I/O0–I/O7. Power management is implemented per-port via CE-driven automatic power-down, achieving 660 µW typical standby current when both ports are deselected with CMOS-level inputs.

Key Specifications

Pinout & Package

80-pin thin quad flatpack (TQFP), PN80-1 package (14 mm × 14 mm × 1.4 mm), lead-free and RoHS-compliant. All VCC pins require local decoupling; all GND pins must be connected to system ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C33256PFS-35BIN, the 70V07L35PF uniquely integrates arbitration, semaphore, and interrupt logic - reducing BOM count and eliminating timing-critical external logic, while maintaining identical speed and package footprint.

Availability

70V07L35PF is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics data concentrators, and medical imaging subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V07L35PF 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 semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V07L35PF belongs to IDT's legacy dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and low-latency memory access are critical.

FAQ

What is the maximum operating temperature range for the 70V07L35PF?

The 70V07L35PF is rated for industrial temperature operation from −40°C to +85°C. This specification is guaranteed across all electrical parameters in the datasheet, including access time (35 ns max), standby current (660 µW typ.), and BUSY arbitration timing (tBDD ≤ 40 ns). The device uses CMOS process technology optimized for thermal stability in harsh environments.

Does the 70V07L35PF support true simultaneous read/write to the same memory location?

Yes, the 70V07L35PF implements true dual-port memory cells that allow simultaneous access - including concurrent read/write - to the same address. When contention occurs, on-chip arbitration asserts BUSYL or BUSYR within 35 ns (tBAA max) to stall the delayed port, ensuring data integrity without external logic. This behavior is confirmed in Truth Table IV and Timing Waveform 11.

How does the semaphore function work on the 70V07L35PF?

The 70V07L35PF dedicates eight memory locations (addressed by A0–A2) as binary semaphore flags. Access requires CE = VIH and SEM = VIL. Writing "0" to I/O0 acquires the flag; writing "1" releases it. All I/O lines reflect the flag state during reads. This hardware mechanism enables atomic resource locking between processors without software intervention or risk of race conditions.

Can the 70V07L35PF be used in Master/Slave configurations for 16-bit data bus expansion?

Yes - the 70V07L35PF supports width expansion via its M/S pin. When configured as Master (M/S = VIH), BUSYL/BUSYR drive push-pull outputs; as Slave (M/S = VIL), they become inputs that inhibit writes during contention. Multiple slaves share the same address range as the master, enabling error-free 16-bit+ word systems without discrete logic, as detailed in Functional Description section "Master/Slave Arrays".

What is the standby current consumption of the 70V07L35PF under full power-down conditions?

Under full standby (ISB3 condition), with both ports deselected (CEL = CER > VCC − 0.2 V), all inputs at CMOS levels, and f = 0, the 70V07L35PF consumes 660 µW typical (equivalent to ~200 µA at 3.3 V). This value is measured and specified in Table 9 of the datasheet and applies across the full −40°C to +85°C temperature range.