Renesas 709079L9PF8

Overview

709079L9PF8 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, 9 ns pipelined clock-to-data access (max), 15 ns cycle time at 66.7 MHz, and industrial temperature support (–40°C to +85°C). It serves in real-time interprocessor communication and high-speed buffer applications requiring deterministic latency and concurrent read/write operations.

For engineers reviewing the 709079L9PF8 datasheet, 709079L9PF8 pinout, 709079L9PF8 application, or 709079L9PF8 equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade timing behavior, and direct alternative part comparisons for synchronous dual-port SRAM selection in embedded control and data acquisition systems.

Technical Context

The 709079L9PF8 implements fully synchronous operation on both ports with registered address, data, and control inputs-requiring only 4 ns setup and 1 ns hold relative to CLK. Its self-timed write architecture enables fast cycle times independent of clock low time, while dual chip enables (CE0/CE1 per port) allow seamless depth expansion without external logic.

It supports two output modes via FT/PIPE pin: flow-through (no latency) or pipelined (1-cycle delay, 9 ns tCD2 max), and integrates address counters with independent CNTEN/CNTRST per port for burst-mode addressing. The device uses TTL-compatible 5 V ±10% supply and features automatic power-down when CE0 = VIH or CE1 = VIL.

Key Specifications

Pinout & Package

709079L9PF8 is housed in a 100-pin Thin Quad Flatpack (TQFP, PN100) with exposed thermal pad (not electrically connected), 0.5 mm pitch, and pin 1 marked by dot. All VCC pins must be decoupled locally; all GND pins require low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and IDT70V9079L15PF, the 709079L9PF8 uniquely balances industrial temperature support, 5 V compatibility, and 9 ns pipelined latency in a mature, pin-validated package-making it optimal for retrofitting legacy 5 V control systems requiring extended environmental resilience.

Availability

709079L9PF8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing buffers, and industrial motion controller FIFOs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 709079L9PF8 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-including 709079L9PF8-was designed specifically for deterministic, low-latency shared-memory architectures in industrial automation, test equipment, and communications infrastructure where concurrent dual-port access and industrial-grade reliability are mandatory.

FAQ

What is the maximum operating frequency of the 709079L9PF8 in pipelined mode?

The 709079L9PF8 achieves a 15 ns clock cycle time (tCYC2) in pipelined output mode, supporting sustained operation at 66.7 MHz. This is confirmed in the AC Electrical Characteristics table (Table 11) for the X9 speed grade under industrial conditions. The 9 ns clock-to-data valid (tCD2) parameter directly enables this frequency by bounding read latency.

Does the 709079L9PF8 support true simultaneous access to the same memory location from both ports?

Yes, the 709079L9PF8 uses true dual-ported memory cells, explicitly stated in the Features section and Functional Description. This allows concurrent read/write or read/read operations on identical addresses without contention or arbitration-verified by the functional block diagram and Truth Table I showing independent port control.

What is the purpose of the FT/PIPE pin on the 709079L9PF8?

The FT/PIPE pin selects between flow-through (VIL) and pipelined (VIH) output modes. In flow-through mode, data appears combinatorially after address/control setup; in pipelined mode, output is registered on the next clock edge-adding 1-cycle latency but improving timing margin and enabling higher frequencies. This is detailed in Truth Table II and Figures 7–8.

How does the address counter function on the 709079L9PF8?

Each port has independent CNTEN and CNTRST inputs. When CNTEN is low on a rising CLK edge, the internal address counter advances automatically-eliminating need for external address incrementing during bursts. CNTRST synchronously resets the counter to 0. This behavior is defined in Truth Table II and illustrated in Figures 15–18.

Is the 709079L9PF8 pin-compatible with other members of the IDT7090xx family?

The 709079L9PF8 shares the same 100-pin TQFP (PN100) package and pinout with IDT709089 variants, but A15 is No Connect (NC) for 709079 (32K × 8), whereas it is active for 709089 (64K × 8). Pin compatibility is confirmed in the Pin Configuration diagram (Figure 2) and Note 1 on pages 2 and 3 of the datasheet.