Renesas 70V9279L12PRFI

Overview

70V9279L12PRFI 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 independent left and right ports, 12ns pipelined clock-to-data access, 10ns cycle time at 100MHz, and industrial-grade operation from –40°C to +85°C - used in real-time inter-processor communication and FPGA co-processor buffering.

For engineers reviewing the 70V9279L12PRFI datasheet, 70V9279L12PRFI pinout, 70V9279L12PRFI application, or 70V9279L12PRFI equivalent, key selection criteria include pipelined vs. flow-through output mode configuration, dual chip-enable depth expansion capability, separate upper/lower byte controls for bus matching, synchronous timing compliance (4ns setup/1ns hold), and LVTTL-compatible 3.3V ±0.3V single-supply operation.

Technical Context

This device implements fully synchronous dual-port architecture with registered address, data, and control inputs on both ports, supporting concurrent access without arbitration logic. It features dual independent clock domains (CLKL/CLKR), asynchronous OE per port, and FT/PIPE pin-selectable output modes - pipelined (10ns cycle, 6.5ns tCD2) or flow-through (30ns cycle, 25ns tCD1).

Internal address counter logic enables automatic sequential addressing via CNTEN/CNTRST signals, while separate UBL/UBR and LBL/LBR controls allow byte-level write masking. Chip enable double-buffering (when FT/PIPE = VIH) ensures deterministic two-cycle deselection for predictable timing in burst transfers.

Key Specifications

Pinout & Package

70V9279L12PRFI is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 32 I/O pins (16 per port), dual clocks, dual chip enables, and dedicated flow-through/pipeline control per port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and AS7C33256P-12JIN, the 70V9279L12PRFI uniquely combines industrial temperature support, dual chip-enable expansion, and 128-pin TQFP compatibility - making it optimal for drop-in upgrades in existing industrial control and telecom hardware.

Availability

70V9279L12PRFI is available at Aetrix Electronics and suitable for real-time inter-processor communication, FPGA co-processor buffering, and motor drive control loop applications requiring stable component supply across long production lifecycles.

Supply support for 70V9279L12PRFI 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 70V9279L12PRFI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data sharing between heterogeneous processors and programmable logic in mission-critical embedded systems.

FAQ

What is the maximum operating frequency of the 70V9279L12PRFI in pipelined mode?

The 70V9279L12PRFI supports up to 100 MHz operation in pipelined output mode, corresponding to a 12 ns maximum clock cycle time (tCYC2). This is validated over the full industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, enabling sustained 1.6 Gbps aggregate bandwidth across both ports without derating.

Does the 70V9279L12PRFI support independent timing domains for left and right ports?

Yes, the 70V9279L12PRFI features fully independent clock inputs (CLKL and CLKR), allowing asynchronous operation between ports. Each port maintains its own synchronous timing domain with 4 ns setup and 1 ns hold requirements, enabling integration into heterogeneous systems such as ARM+FPGA or DSP+MCU architectures without global clock distribution constraints.

How does the FT/PIPE pin affect timing behavior in the 70V9279L12PRFI?

The FT/PIPE pin configures output timing mode per port: VIH selects pipelined operation (12 ns cycle, 6.5 ns clock-to-data), while VIL selects flow-through (30 ns cycle, 25 ns clock-to-data). Critically, when FT/PIPE = VIH, CE0/CE1 become double-buffered - requiring two clock cycles to deselect - which must be accounted for in state-machine design to avoid unintended access windows.

Can the 70V9279L12PRFI perform simultaneous read and write to the same memory location?

Yes, the 70V9279L12PRFI uses true dual-ported memory cells that permit simultaneous read from one port and write to the same address on the other port. This capability is fundamental to its role in inter-processor communication and eliminates the need for software arbitration or shadow memory, ensuring deterministic latency in real-time systems.

What package type and dimensions does the 70V9279L12PRFI use?

The 70V9279L12PRFI is packaged in a 128-pin Thin Quad Flatpack (TQFP) with body dimensions of 14 mm × 20 mm × 1.4 mm. It follows standard JEDEC MO-147AC footprint, compatible with automated SMT assembly and reflow profiles for lead-free processes - no special thermal pads or underfill required.