Renesas 70V9279L7PRFGI

Overview

70V9279L7PRFGI from IDT (now part of Renesas) is a high-speed, 32K x 16-bit synchronous dual-port SRAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports. It operates at 3.3V ±0.3V, supports pipelined (10 ns cycle, 100 MHz) and flow-through output modes, and features separate upper/lower byte controls for bus compatibility - used in real-time DSP co-processing, network packet buffering, and FPGA-based protocol bridging.

For engineers reviewing the 70V9279L7PRFGI datasheet, 70V9279L7PRFGI pinout, 70V9279L7PRFGI application, or 70V9279L7PRFGI equivalent, this page delivers verified timing parameters (tCD2 = 7.5 ns max), industrial temperature support (–40°C to +85°C), dual chip enable depth expansion, counter-enabled burst addressing, and TQFP-128 package layout - all critical for deterministic latency systems requiring port-to-port synchronization.

Technical Context

The 70V9279L7PRFGI implements fully synchronous operation on both ports with 4 ns setup / 1 ns hold on all inputs, register-controlled address/data/control paths, and self-timed write logic enabling minimal cycle time. Its dual-port architecture includes independent clock domains (CLKL/CLKR), asynchronous OE per port, and FT/PIPE pin-selectable output pipeline depth.

It integrates address strobe (ADSL/ADSR), counter enable/reset (CNTENL/CNTRSTL, CNTENR/CNTRSTR), and byte-select logic (UBL/LBL, UBR/LBR) to support multiplexed bus interfacing and automatic address incrementing - essential for burst-mode FIFO emulation and DMA handshaking without external sequencing logic.

Key Specifications

Pinout & Package

70V9279L7PRFGI is housed in a 128-pin TQFP package with exposed thermal pad (not electrically connected). Pin assignments are symmetric across left/right ports, supporting bidirectional data flow with dedicated clock, chip enable, byte select, and address strobe signals per port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-100AXC and AS7C33128A-10JIN, the 70V9279L7PRFGI uniquely combines industrial temperature rating, integrated address counter, dual chip enables for scalable memory depth, and per-port FT/PIPE control - making it optimal for deterministic, expandable, and thermally demanding embedded systems.

Availability

70V9279L7PRFGI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and FPGA-based protocol conversion requiring stable component supply across long production lifecycles.

Supply support for 70V9279L7PRFGI 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 70V9279L7PRFGI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time systems requiring deterministic latency, asynchronous domain bridging, and robust industrial-grade reliability.

FAQ

What is the maximum operating frequency of the 70V9279L7PRFGI in pipelined mode?

The 70V9279L7PRFGI supports up to 100 MHz operation in pipelined output mode, corresponding to a 10 ns clock cycle time (tCYC2). This is validated across the full industrial temperature range (–40°C to +85°C) and 3.3 V ±0.3 V supply, making the 70V9279L7PRFGI suitable for high-throughput data buffering in real-time embedded systems.

Does the 70V9279L7PRFGI support simultaneous read and write to the same memory address?

Yes, the 70V9279L7PRFGI uses true dual-ported memory cells that allow concurrent read and write operations to the exact same address - one port reads while the other writes - without contention or arbitration delay. This capability is fundamental to its use in inter-processor communication and clock-domain bridging applications involving the 70V9279L7PRFGI.

What is the function of the FT/PIPE pin on the 70V9279L7PRFGI?

The FT/PIPE pin on the 70V9279L7PRFGI selects between flow-through (FT/PIPE = VIL) and pipelined (FT/PIPE = VIH) output modes per port. In pipelined mode, data appears after one clock cycle with 6.5 ns clock-to-data-out delay and 10 ns cycle time; in flow-through mode, data appears combinatorially with 15 ns tCD1 delay and 22 ns cycle time - giving designers flexibility for latency vs. throughput trade-offs in the 70V9279L7PRFGI implementation.

Can the 70V9279L7PRFGI be used for depth expansion without external logic?

Yes, the 70V9279L7PRFGI includes dual chip enables (CE0X and CE1X) per port, allowing direct depth expansion to 64K x 16 or larger configurations using multiple devices without additional decoding logic. When CE0X = VIL and CE1X = VIH, the port is enabled; stacking devices with staggered CE0/CE1 asserts enables seamless address-space extension - a key feature distinguishing the 70V9279L7PRFGI from simpler dual-port SRAMs.

What temperature range is guaranteed for the 70V9279L7PRFGI?

The 70V9279L7PRFGI is specified for industrial temperature operation from –40°C to +85°C, validated across all AC and DC electrical parameters in the datasheet. This rating applies to the 'L' speed grade (70V9279L7PRFGI), ensuring reliable performance in harsh environments such as factory automation controllers, outdoor telecom equipment, and transportation electronics utilizing the 70V9279L7PRFGI.