Renesas 70V27L35PF

Overview

70V27L35PF from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true simultaneous access to the same memory location from independent left and right ports, 35ns maximum read cycle time (tRC), 660μW typical standby power, and full on-chip semaphore and interrupt support for inter-processor communication in real-time embedded systems.

For engineers reviewing the 70V27L35PF datasheet, 70V27L35PF pinout, 70V27L35PF application, or 70V27L35PF equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation, TQFP-100 package details, and validated alternatives for bus-width expansion and master/slave memory architectures.

Technical Context

The 70V27L35PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external arbitration logic. Its on-chip port arbitration uses BUSY flag signaling triggered by address match or chip enable assertion, with priority resolution governed by tAPS (5ns setup time).

It supports semaphore-based resource sharing via eight dedicated flags addressed by A0–A2 and accessed through I/O0–I/O15, with guaranteed tSWRD (5ns write-to-read) and tSPS (5ns contention window) timing. The device operates exclusively from a single 3.3V ±0.3V supply and uses LVTTL-compatible I/O levels.

Key Specifications

Pinout & Package

70V27L35PF is housed in a 100-pin TQFP (PN100-1) with exposed pad thermal design, requiring connection of all VDD and VSS pins per datasheet layout rules. Pin 1 index corner is marked with a dot; pin numbering follows standard counter-clockwise convention from top-left.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-35AXI and IDT70V3609S35PF, the 70V27L35PF uniquely delivers integrated M/S cascading, ultra-low 660μW standby, and full semaphore/INT hardware in a compact 100-pin TQFP-making it optimal for space-constrained, power-sensitive industrial and avionics designs requiring deterministic inter-processor synchronization.

Availability

70V27L35PF is available at Aetrix Electronics and suitable for industrial PLCs, real-time DSP interfaces, avionics sensor hubs, and medical imaging pipelines requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for 70V27L35PF 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), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory interface, and RF power solutions for high-performance computing and communications infrastructure.

The IDT70V27 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems-emphasizing hardware arbitration, semaphore support, and seamless bus-width scalability without external logic.

FAQ

What is the maximum operating frequency supported by the 70V27L35PF?

The 70V27L35PF does not specify a clock frequency; it is an asynchronous SRAM with timing defined by access cycles. Its 35ns read cycle time (tRC) supports effective bandwidth up to ~28.6 MHz in continuous read mode. Real-world throughput depends on address/control signal timing margins and bus protocol overhead-not a fixed clock rate. The 70V27L35PF achieves this performance with zero wait states under proper layout and termination.

Does the 70V27L35PF support both commercial and industrial temperature ranges?

Yes, the 70V27L35PF is explicitly rated for the industrial temperature range of -40°C to +85°C, as confirmed in the datasheet's "Commercial and Industrial Temperature Range" header and DC electrical characteristics tables. It is not offered in a commercial-only variant-the 'L' suffix denotes low-power operation, not temperature grade. All 70V27L35PF units meet industrial qualification requirements.

How does the BUSY arbitration mechanism work on the 70V27L35PF?

The 70V27L35PF uses hardware-based BUSY arbitration triggered either by address match (tBAA/tBDA) or chip enable assertion (tBAC/tBDC). When configured as Master (M/S = VIH), BUSY outputs assert to block writes on the contending port. Priority is resolved within 5ns (tAPS), and valid data appears after tBDD delay (max 40ns for 35ns version). As Slave (M/S = VIL), BUSY is an input that internally inhibits writes-enabling deterministic, lock-free multi-processor coordination.

Can the 70V27L35PF be used in a 32-bit data bus configuration?

Yes, the 70V27L35PF supports 32-bit expansion via its Master/Slave cascading capability. Two devices can be connected with M/S pins set to VIH (Master) and VIL (Slave), using BUSY flag handshaking to synchronize access. This eliminates external logic and preserves full 35ns access speed across the combined 32-bit word-verified in the functional description and truth tables of the official datasheet.

What is the purpose of the SEM pins on the 70V27L35PF?

The SEML and SEMR pins on the 70V27L35PF enable semaphore register access mode: when CE = VIH and SEM = VIL, the device routes I/O0–I/O15 to eight dedicated hardware semaphore flags (addressed by A0–A2). This provides atomic, hardware-enforced resource locking between ports-bypassing software polling and reducing inter-processor latency to just 5ns (tSWRD), as specified in the AC timing tables.