Renesas 709079S12PF

Overview

709079S12PF from Integrated Device Technology is a 32K × 8-bit (256 Kbit) synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 12 ns maximum clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply. It serves in real-time embedded systems requiring concurrent read/write operations across two independent buses, such as digital signal processor (DSP) co-processing interfaces.

For engineers reviewing the 709079S12PF datasheet, 709079S12PF pinout, 709079S12PF application, or 709079S12PF equivalent, key selection criteria include pipelined vs. flow-through output timing modes, dual chip enable support for depth expansion, counter-enable/counter-reset functionality for burst addressing, and low-power standby current of 1 mA (typ.) in L-version variants.

Technical Context

The 709079S12PF implements fully synchronous operation on both ports with registered address, data, and control inputs-requiring only 4 ns setup and 1 ns hold time relative to CLK. Its self-timed write architecture enables fast cycle times without external timing control, achieving 20 ns cycle time (50 MHz) in pipelined mode.

It supports two distinct output modes selected per port via FT/PIPE pins: pipelined (1-cycle latency, 9 ns tCD2 typ.) and flow-through (0-cycle latency, 25 ns tCD1 max.). The integrated address counter-enabled by CNTEN and reset by CNTRST-allows automatic sequential addressing during burst transfers without host CPU intervention.

Key Specifications

Pinout & Package

709079S12PF is housed in a 100-pin Thin Quad Flatpack (TQFP, PN100) package with 0.5 mm pitch, body size 14 mm × 14 mm × 1.4 mm. All VCC and GND pins must be externally 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, 709079S12PF offers native 5 V operation and integrated address counter for burst efficiency; compared with IDT70V9089S12PF, it provides cost-optimized 256 Kbit density with identical timing and footprint-ideal for memory-constrained industrial designs.

Availability

709079S12PF is available at Aetrix Electronics and suitable for industrial motion controllers, telecom line cards, avionics data hubs, and DSP co-processor interfaces requiring stable component supply across extended product lifecycles.

Supply support for 709079S12PF 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 dual-ported memory applications in real-time embedded systems-including industrial automation, communications infrastructure, and aerospace platforms.

FAQ

What is the memory capacity and organization of the 709079S12PF?

The 709079S12PF is a 32K × 8-bit synchronous dual-port SRAM, providing 256 Kbit total capacity. It uses 15 address lines (A0–A14); A15 is designated No Connect (NC) per the official datasheet. This configuration supports direct interfacing with 16-bit microcontrollers via byte-lane control without address decoding overhead.

Does the 709079S12PF support both pipelined and flow-through output modes?

Yes, the 709079S12PF supports both output modes independently per port via the FT/PIPEL and FT/PIPER pins. In pipelined mode (FT/PIPE = VIH), data appears after one clock cycle (tCD2 ≤ 12 ns). In flow-through mode (FT/PIPE = VIL), data appears with zero-cycle latency (tCD1 ≤ 25 ns), enabling real-time response critical in control loops.

What is the purpose of the ADS and CNTEN pins on the 709079S12PF?

ADSL/ADSR (Address Strobe) selects between external address loading (ADSL = VIL) and internal counter-generated addressing (ADSL = VIH). CNTENL/CNTENR enables synchronous auto-increment of the internal address counter on each rising CLK edge-allowing burst transfers without continuous address bus updates from the host controller.

How does the dual chip enable scheme (CE0/CE1) function on the 709079S12PF?

Each port has two chip enables: CE0X (active-low) and CE1X (active-high). The port activates only when CE0X = VIL and CE1X = VIH. This dual-signal scheme allows independent power gating per port and enables depth expansion-e.g., stacking two 709079S12PF devices using CE0/CE1 to select upper/lower banks without external logic.

Is the 709079S12PF suitable for industrial temperature applications?

Yes, the 709079S12PF is specified for the industrial temperature range of –40°C to +85°C and is explicitly listed in the "Industrial" column of the Ordering Information table (709079S12PF). Its DC and AC electrical characteristics are guaranteed across this range, making it suitable for factory automation, motor drives, and outdoor telecom equipment.