Renesas 709079S9PF

Overview

709079S9PF from Integrated Device Technology is a 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 15 ns pipelined clock-to-data access, TTL-compatible 5 V ±10% operation, and industrial temperature range (–40°C to +85°C), used in high-speed packet buffering and real-time DSP co-processing systems.

For engineers reviewing the 709079S9PF datasheet, 709079S9PF pinout, 709079S9PF application, or 709079S9PF equivalent, this page delivers verified timing parameters, dual-port control logic behavior, flow-through/pipelined mode selection, counter enable/reset functionality, and depth-expansion-ready chip enable architecture - all confirmed for the exact 709079S9PF variant.

Technical Context

The 709079S9PF implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports, using rising-edge clocking and self-timed internal write pulses independent of clock transitions. It supports two output modes - flow-through (tCD1 = 30 ns max) and pipelined (tCD2 = 15 ns max) - selected per port via dedicated FT/PIPE pins.

Each port features independent chip enables (CE0X/CE1X), asynchronous output enable (OEX), address strobe (ADSX), counter enable (CNTENX), and counter reset (CNTRSTX), enabling precise interleaved memory access, burst address generation, and low-power standby states with ISB3 = 0.2 mA typical (full CMOS standby).

Key Specifications

Pinout & Package

709079S9PF is housed in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, with 4×25 pin grid, requiring all VCC and GND pins to be connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC, 709079S9PF offers native 5 V operation and simpler interface for legacy systems; compared with IDT70V9079S15PF, it shares identical functionality but lacks updated process benefits and RoHS status - making the latter optimal for production continuity.

Availability

709079S9PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, avionics sensor hubs, and real-time DSP subsystems requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for 709079S9PF 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 communications and computing markets.

The IDT7090xx family was designed specifically for high-bandwidth, low-latency dual-processor and ASIC-to-ASIC interconnect applications demanding simultaneous memory access and deterministic timing - exemplified by the 709079S9PF's pipelined/flow-through mode flexibility and counter-enhanced burst capability.

FAQ

What is the memory capacity and organization of the 709079S9PF?

The 709079S9PF is a 32K × 8-bit synchronous dual-port static RAM, providing 256 Kbits of total storage. Its address space spans A0–A14 (15 address lines), with A15 designated as No Connect (NC) per the official datasheet - confirming its 32K, not 64K, configuration. This distinguishes it from the IDT709089 variant and ensures correct PCB footprint alignment.

Does the 709079S9PF support both flow-through and pipelined output modes?

Yes, the 709079S9PF supports both output modes per port via dedicated FT/PIPEL and FT/PIPER pins. When driven low (VIL), the port operates in flow-through mode with tCD1 = 30 ns max; when high (VIH), it enters pipelined mode with tCD2 = 15 ns max. This per-port configurability allows mixed-mode operation - for example, flow-through on the watchdog port and pipelined on the main CPU port - within a single 709079S9PF device.

What is the industrial temperature rating for the 709079S9PF?

The 709079S9PF is rated for industrial temperature operation from –40°C to +85°C, with all AC and DC electrical specifications fully guaranteed across this range. This includes timing parameters like tCD2 = 15 ns max and power metrics such as ISB3 = 0.2 mA typical, making it suitable for deployment in harsh environments including factory automation controllers and outdoor telecom cabinets.

How does the address counter function in the 709079S9PF?

The 709079S9PF integrates an independent address counter per port, controlled by CNTENX and CNTRSTX inputs. When CNTENX = VIL on the rising CLK edge, the counter advances to the next address regardless of CE or OE state. CNTRSTX = VIL resets the counter to A0. This hardware counter eliminates external address generation logic in burst-access applications, directly reducing FPGA gate count or MCU interrupt load in systems using the 709079S9PF.

What package type and pin count does the 709079S9PF use?

The 709079S9PF uses a 100-pin Thin Quad Flatpack (TQFP) package, identified as PN100 in IDT documentation, with physical dimensions of 14 mm × 14 mm × 1.4 mm. Pin 1 is marked by a black dot, and the pinout follows the rotated orientation specified in the February 2016 revision - confirming mechanical and thermal compatibility with standard TQFP reflow profiles and socketing solutions.