Renesas 70V27S15PFI8

Overview

70V27S15PFI8 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, 15 ns max read cycle time (tRC), industrial temperature range (–40°C to +85°C), and LVTTL-compatible I/O. It serves as a stand-alone or master/slave-configured memory buffer in real-time embedded systems requiring deterministic inter-processor communication.

For engineers reviewing the 70V27S15PFI8 datasheet, 70V27S15PFI8 pinout, 70V27S15PFI8 application, or 70V27S15PFI8 equivalent, key selection criteria include dual-port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH configuration, semaphore support for eight concurrent locks, and TQFP-100 packaging with verified 14 mm × 14 mm footprint compatibility.

Technical Context

The 70V27S15PFI8 implements fully asynchronous dual-port architecture with independent left/right address, control, and 16-bit bidirectional I/O buses. Its on-chip arbitration logic resolves contention via address-match or chip-enable priority, generating push-pull BUSY outputs (not tri-state) when configured as Master (M/S = VIH).

It supports semaphore signaling across both ports using A0–A2 addressing of eight shared flags, with dedicated SEM pins and tSWRD ≤ 5 ns write-to-read latency. Power management uses TTL- and CMOS-level CE0/CE1 enables to achieve ISB3 ≤ 1.0 mA full standby current at VDD = 3.3 V.

Key Specifications

Pinout & Package

70V27S15PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body dimensions 14 mm × 14 mm × 1.4 mm, and lead finish compliant with RoHS green-part requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and R1EX24032AS0C-15, the 70V27S15PFI8 uniquely delivers industrial temperature support, hardware semaphore addressing, and seamless MASTER/SLAVE bus expansion - making it the sole option for certified safety-critical or wide-temperature embedded systems requiring deterministic dual-port behavior.

Availability

70V27S15PFI8 is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control interfaces, and medical imaging data buffers requiring stable component supply across long production lifecycles.

Supply support for 70V27S15PFI8 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 fabless semiconductor company specializing in timing, memory interface, and RF power solutions for high-performance computing and communications.

The IDT70V27 family was designed specifically for deterministic inter-processor communication in real-time embedded systems, emphasizing hardware arbitration, low-latency semaphore support, and industrial-grade reliability.

FAQ

What is the maximum operating frequency supported by the 70V27S15PFI8?

The 70V27S15PFI8 does not operate on a clock signal - it is a fully asynchronous dual-port SRAM. Its performance is defined by timing parameters: tRC = 15 ns max read cycle time corresponds to an effective throughput of up to 66.7 MHz in burst-mode operation. Actual system frequency depends on external controller timing margins and board layout.

Does the 70V27S15PFI8 support true simultaneous read/write to the same address?

Yes, the 70V27S15PFI8 features true dual-ported memory cells that allow independent, concurrent read and write operations to the exact same memory location. This capability is fundamental to its use in lock-free inter-processor communication and is validated across all speed grades including the 70V27S15PFI8.

How does the BUSY flag behave when the 70V27S15PFI8 is configured as a Slave?

When M/S = VIL, BUSYL and BUSYR become inputs (not outputs). As a Slave, the 70V27S15PFI8 monitors the BUSY signal from the Master device and internally inhibits writes while BUSY is asserted - preventing data corruption during arbitration. This behavior is hardwired and requires no firmware configuration.

Can the 70V27S15PFI8 be used in MASTER/SLAVE configurations for 32-bit data paths?

Yes, the 70V27S15PFI8 supports native 32-bit expansion using the MASTER/SLAVE select (M/S) pin. When cascaded, the Master device generates BUSY to coordinate access, and the 70V27S15PFI8's dual chip enables (CE0/CE1) eliminate need for external logic - enabling clean 32-bit word transfers in telecom and test equipment.

What is the purpose of the SEM pins on the 70V27S15PFI8?

The SEML and SEMR pins enable hardware semaphore functionality on the 70V27S15PFI8. When asserted, they activate eight dedicated semaphore flags addressed by A0–A2. These flags support atomic lock/unlock operations across ports with tSWRD ≤ 5 ns latency - providing OS-independent resource synchronization for real-time systems.