Renesas 709379L9PFI8

Overview

709379L9PFI8 from Renesas Electronics (formerly IDT) is a high-speed, synchronous, pipelined dual-port static RAM with true dual-ported 32K × 18-bit memory array, supporting simultaneous independent access on left and right ports, 9 ns pipelined clock-to-data access, 15 ns cycle time at 100 MHz, and industrial temperature operation (–40°C to +85°C). It is used in real-time inter-processor communication, FPGA co-processing buffers, and telecom packet buffering where deterministic latency and concurrent read/write are critical.

For engineers reviewing the 709379L9PFI8 datasheet, 709379L9PFI8 pinout, 709379L9PFI8 application, or 709379L9PFI8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade timing behavior, and technically differentiated alternatives - all grounded in the official Renesas/IDT DSC-4845/8 datasheet (February 2018).

Technical Context

This device implements fully synchronous dual-port architecture with registered address, data, and control inputs on both ports, enabling 4 ns setup and 0 ns hold times. Its self-timed write mechanism decouples internal write pulse generation from clock edge timing, allowing minimal cycle time without external wait-state logic.

It supports two distinct output modes per port via FT/PIPE pins: flow-through (tCD1 ≤ 20 ns) and pipelined (tCD2 ≤ 9 ns), with separate upper-byte (I/O9–I/O17) and lower-byte (I/O0–I/O8) controls for bus-matching compatibility. Address counter logic enables burst-mode sequential access with CNTEN/CNTRST control independent of CE states.

Key Specifications

Pinout & Package

709379L9PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with 25 pins per side. All VCC and GND pins must be connected per datasheet layout guidelines (PN100 package code).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375BV-9BGXI and IDT70V9379S9PFGI, the 709379L9PFI8 uniquely retains 5 V TTL compatibility, industrial temperature qualification, and identical pinout to legacy IDT709379 designs - making it the sole option for maintaining form-fit-function in existing 5 V dual-processor systems.

Availability

709379L9PFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, avionics, and FPGA-based embedded systems requiring stable component supply, long-lifecycle support, and guaranteed industrial-grade performance.

Supply support for 709379L9PFI8 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

Renesas Electronics Corporation acquired Integrated Device Technology (IDT) in 2019 and maintains legacy IDT memory product lines including high-performance dual-port SRAMs.

The 709379L9PFI8 belongs to IDT's synchronous dual-port SRAM family, engineered for deterministic, low-latency inter-processor communication in real-time embedded systems demanding concurrent access and industrial reliability.

FAQ

What is the maximum operating frequency of the 709379L9PFI8 in pipelined mode?

The 709379L9PFI8 supports 100 MHz operation in pipelined output mode, corresponding to a 15 ns maximum clock cycle time (tCYC2). This is validated across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, with all timing parameters met under worst-case conditions per DSC-4845/8.

Does the 709379L9PFI8 support true simultaneous read/write to the same memory location?

Yes, the 709379L9PFI8 uses true dual-ported memory cells that allow independent, concurrent read and write operations to identical addresses on left and right ports - a hardware-level capability confirmed in the Functional Block Diagram and Truth Table I of the official datasheet.

What is the function of the FT/PIPE pins on the 709379L9PFI8?

The FT/PIPEL and FT/PIPER pins configure output timing mode per port: logic low (VIL) enables flow-through mode (tCD1 ≤ 20 ns), while logic high (VIH) enables pipelined mode (tCD2 ≤ 9 ns). Each port operates independently, allowing mixed-mode system configurations.

Can the 709379L9PFI8 be used in depth-expanded memory configurations without external logic?

Yes, the 709379L9PFI8 integrates dual chip enables (CE0X/CE1X) per port, enabling direct depth expansion of multiple devices using only CE signals - no external decoding logic is required, as explicitly demonstrated in Figure 4 of the DSC-4845/8 datasheet.

Is the 709379L9PFI8 still in active production and supported by Renesas?

Yes, the 709379L9PFI8 remains an active, non-obsolete part per Renesas' official documentation (PDN# SP-17-02 confirms 709369 is obsolete, but 709379 is active). Renesas continues to provide datasheets, technical support, and supply chain continuity for this industrial-grade dual-port SRAM.