Renesas 709079L9PFI8

Overview

709079L9PFI8 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 (max), 25 ns flow-through cycle time, and industrial temperature support (–40°C to +85°C) in a 100-pin TQFP package. It serves as shared memory buffer in high-speed DSP co-processing and real-time video frame buffering systems.

For engineers reviewing the 709079L9PFI8 datasheet, 709079L9PFI8 pinout, 709079L9PFI8 application, or 709079L9PFI8 equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable architecture for depth expansion, counter enable/reset functionality, and TTL-compatible 5V ±10% single-supply operation with low standby power (1 mW typ).

Technical Context

This device implements fully synchronous operation on both ports with 4 ns setup / 1 ns hold timing on all control, address, and data inputs. Its internal architecture includes dedicated address/data/control registers per port, self-timed write logic, and independent address strobe (ADS) and counter control (CNTEN/CNTRST) signals enabling burst-mode address generation without external sequencing logic.

The dual-port interface supports concurrent read/write operations across ports with port-to-port delay as low as 35 ns (flow-through) or 40 ns (pipelined), and features automatic power-down via CE0/CE1 logic - allowing one port to remain active while the other enters ultra-low-power standby (1 mW typ for L-version).

Key Specifications

Pinout & Package

709079L9PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 14 mm × 1.4 mm, with exposed pad not electrically connected. All VCC and GND pins must be individually decoupled per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V9079L15PF, the 709079L9PFI8 provides native 5V operation without level shifters, retains full industrial temperature qualification, and delivers identical 32K × 8 functionality - making it optimal for legacy 5V embedded systems requiring drop-in reliability and minimal redesign effort.

Availability

709079L9PFI8 is available at Aetrix Electronics and suitable for industrial PLCs, real-time video processing systems, network switching hardware, and DSP co-processor interfaces requiring stable component supply across extended product lifecycles.

Supply support for 709079L9PFI8 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, RF, and high-performance computing solutions.

The IDT7090xx family was designed specifically for deterministic, low-latency shared memory applications in real-time embedded systems - emphasizing synchronous dual-port architecture, industrial temperature resilience, and seamless integration with 5V logic families.

FAQ

What is the maximum operating frequency of the 709079L9PFI8 in pipelined mode?

The 709079L9PFI8 supports up to 40 MHz operation in pipelined output mode, derived from its 25 ns maximum clock cycle time (tCYC2). This timing is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply. The 709079L9PFI8 achieves this using registered inputs and self-timed write logic, ensuring stable performance without external timing margining.

Does the 709079L9PFI8 support asynchronous read operations?

No, the 709079L9PFI8 is a fully synchronous dual-port SRAM: all address, data, and control inputs (except OEL/OER and FT/PIPE) are registered on the rising edge of CLKL or CLKR. Output enable (OE) is asynchronous, allowing immediate tri-state control, but data output timing remains strictly clock-aligned - either zero-latency (flow-through) or one-cycle delayed (pipelined) relative to clock edge.

How does the address counter function in the 709079L9PFI8?

The 709079L9PFI8 integrates a synchronous address counter per port controlled by CNTEN and ADS signals. When ADS = VIH and CNTEN = VIL on a rising clock edge, the counter advances to the next address. When ADS = VIL, the external address is loaded instead. This allows burst transfers without external address generation logic - a key feature confirmed in Truth Table II and timing diagrams for the 709079L9PFI8.

Is A15 used on the 709079L9PFI8?

No, A15 is a no-connect (NC) pin for the IDT709079 variant, including the 709079L9PFI8. The device implements a 32K × 8-bit organization (2¹⁵ = 32,768 addresses), but uses only A0–A14 for addressing. This is explicitly stated in Note 1 of the Pin Configuration diagram and Functional Description section of the datasheet for the 709079L9PFI8.

What power-saving modes does the 709079L9PFI8 support?

709079L9PFI8 supports multiple power-saving states: full standby (1 mW typ) when both CE0 and CE1 are deasserted to CMOS levels (CE0 > VCC−0.2V, CE1 < 0.2V); partial standby (130 mA typ) when one port is enabled and the other disabled; and dynamic active power of 950 mW typ during 40 MHz operation. These modes are validated in the DC Electrical Characteristics table for the L-version of the 709079L9PFI8.