Renesas 70V3389S5PRFI8

Overview

70V3389S5PRFI8 from Integrated Device Technology is a high-speed 64K × 18-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous access to the same memory location, 5 ns max clock-to-data access (industrial grade), and support for independent 3.3 V or 2.5 V I/O interfaces per port. It serves as a buffer or shared memory in real-time DSP systems requiring deterministic latency and concurrent read/write operations across two independent buses.

For engineers reviewing the 70V3389S5PRFI8 datasheet, 70V3389S5PRFI8 pinout, 70V3389S5PRFI8 application, or 70V3389S5PRFI8 equivalent, key selection criteria include pipelined timing compliance at 133 MHz, dual-voltage I/O flexibility (2.5 V/3.3 V per port), industrial temperature operation (−40°C to +85°C), and depth-expansion capability via dual chip enables without external logic.

Technical Context

The 70V3389S5PRFI8 implements fully synchronous operation on both ports with registered address, data, and control inputs clocked on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write completion from clock edge timing, enabling minimal cycle time (7.5 ns) and high bandwidth (9.6 Gbps).

It features independent address counters per port with ADS, CNTEN, and CNTRST controls, allowing external address loading or automatic incrementing-critical for burst-mode FIFO or DMA buffer applications. Byte enable (UB/LB per port) supports 9-bit-wide data masking for bus-matching compatibility with multiplexed architectures.

Key Specifications

Pinout & Package

70V3389S5PRFI8 is packaged in a 128-pin Thin Quad Plastic Flatpack (TQFP) with 0.5 mm pitch, body size ≈14 mm × 20 mm × 1.4 mm. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match selected I/O voltage (3.3 V if OPTL/OPTR = VIH, 2.5 V if VIL); all VSS pins connect to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-5BC and AS7C362000B-55PCN, the 70V3389S5PRFI8 uniquely combines industrial temperature rating, per-port 2.5 V/3.3 V I/O selection, pipelined 5 ns access, and integrated address counter-making it the only option supporting mixed-voltage burst-buffering in space-constrained TQFP layouts.

Availability

70V3389S5PRFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and real-time DSP applications requiring stable component supply, long-term lifecycle assurance, and industrial-grade thermal performance.

Supply support for 70V3389S5PRFI8 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, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The 70V3389S5PRFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic latency, concurrent multi-processor memory access, and robust operation in thermally demanding embedded systems.

FAQ

What is the maximum operating frequency supported by the 70V3389S5PRFI8?

The 70V3389S5PRFI8 supports a minimum clock cycle time of 7.5 ns, corresponding to a maximum operating frequency of 133 MHz under industrial conditions (−40°C to +85°C). This is guaranteed by its 5 ns max clock-to-data (tCD2) specification and 7.5 ns tCYC2 parameter, enabling reliable high-bandwidth data exchange in real-time systems where the 70V3389S5PRFI8 serves as a shared memory backbone.

Does the 70V3389S5PRFI8 support independent voltage levels on its left and right ports?

Yes, the 70V3389S5PRFI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH configures the left port for 3.3 V I/O operation (requiring VDDQL = 3.3 V), while setting it to VIL configures it for 2.5 V (VDDQL = 2.5 V); the same applies independently to the right port. This capability is explicitly confirmed in the device's truth tables and DC operating conditions, making the 70V3389S5PRFI8 uniquely suited for interfacing with heterogeneous logic families without external level shifters.

How does the address counter function in the 70V3389S5PRFI8, and what signals control it?

The 70V3389S5PRFI8 integrates an independent 16-bit address counter per port, controlled by three dedicated signals: ADSL/ADSR (address strobe), CNTENL/CNTENR (counter enable), and CNTRSTL/CNTRSTR (counter reset). When ADS = VIH and CNTEN = VIL, the counter advances on each CLK rise; when ADS = VIH and CNTEN = VIH, the counter holds; and a rising edge on CNTRST resets it to 0x0000. This behavior is verified in Truth Table II and timing diagrams on pages 6 and 14 of the official datasheet, enabling efficient burst-mode access in applications like the 70V3389S5PRFI8-based DMA buffers.

What package type and pin count does the 70V3389S5PRFI8 use?

The 70V3389S5PRFI8 is supplied in a 128-pin Thin Quad Plastic Flatpack (TQFP) package, with dimensions approximately 14 mm × 20 mm × 1.4 mm and 0.5 mm lead pitch. Pin configuration details-including VDD, VSS, OPTL/OPTR, and dual chip enables-are fully documented in the "Pin Configuration" section (pages 4–5) of the datasheet, confirming mechanical and electrical compatibility with standard TQFP footprints used in industrial PCB designs featuring the 70V3389S5PRFI8.

Is the 70V3389S5PRFI8 rated for industrial temperature operation?

Yes, the 70V3389S5PRFI8 is explicitly rated for industrial temperature operation from −40°C to +85°C, as confirmed in the "Recommended Operating Temperature and Supply Voltage" table (page 6) and ordering information (page 16) of the datasheet. The "S5" speed grade designation denotes commercial-and-industrial qualification, and DC/AC specifications-including 5 ns tCD2 max and ISB3 standby current-are guaranteed across this full range, making the 70V3389S5PRFI8 suitable for deployment in harsh environments such as factory automation, transportation systems, and outdoor telecom equipment.