Renesas 709269S9PF8

Overview

709269S9PF8 from IDT is a 16K x 16-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 12ns max clock-to-data access (industrial grade), 5V ±10% TTL-compatible supply, and pipelined/flow-through output mode selection via FT/PIPE pin - used in high-speed inter-processor communication and real-time DSP buffering.

For engineers reviewing the 709269S9PF8 datasheet, 709269S9PF8 pinout, 709269S9PF8 application, or 709269S9PF8 equivalent, this page delivers verified timing parameters, industrial-grade temperature support (–40°C to +85°C), TQFP-100 package details, and confirmed alternative parts for depth-expansion memory systems requiring deterministic latency and byte-selectable writes.

Technical Context

The 709269S9PF8 implements fully synchronous operation on both ports with 4ns setup / 1ns hold on all control, address, and data inputs, using internal registers clocked on the rising edge of CLKL/CLKR. Its self-timed write architecture enables fast cycle times independent of clock low time.

It supports dual chip enables (CE0/CE1 per port) for seamless depth expansion without external logic, and includes separate upper-byte (UB/LB) and lower-byte controls for multiplexed bus compatibility. The address counter advances on CNTEN = LOW at CLK rise, with CNTRST forcing reset to A0.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm × 1.4 mm body, lead-free (Green) option available. Pin 1 marked by corner notch or dot; top view shown in datasheet Figure 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V9269S9PF8 and CY7C026V-15AXC, the 709269S9PF8 uniquely combines industrial-temperature 12ns access, configurable pipelining, and integrated address counter - making it optimal for deterministic real-time systems where latency predictability and bus efficiency are critical.

Availability

709269S9PF8 is available at Aetrix Electronics and suitable for inter-processor communication, DSP real-time buffering, and industrial PLC I/O mapping requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 709269S9PF8 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in high-performance memory, timing, and interface solutions for communications, computing, and industrial markets.

The IDT709269 product line delivers synchronous dual-port SRAMs optimized for deterministic, low-latency shared-memory architectures in real-time embedded systems - emphasizing simultaneous access, industrial reliability, and flexible bus interfacing.

FAQ

What is the maximum operating frequency of the 709269S9PF8 in pipelined mode?

The 709269S9PF8 supports up to 50 MHz operation in pipelined mode, derived from its 20 ns clock cycle time (tCYC2). This timing is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, making it suitable for deterministic real-time systems where cycle consistency matters more than peak bandwidth.

Does the 709269S9PF8 support independent byte-write operations on each port?

Yes, the 709269S9PF8 supports independent upper-byte (UB/UBR) and lower-byte (LB/LBR) write enables per port. When UB = LOW and LB = HIGH, only I/O8–I/O15 are written; when LB = LOW and UB = HIGH, only I/O0–I/O7 are written. This allows 8-bit microcontroller interfacing and partial-word updates without read-modify-write cycles.

Is the address counter in the 709269S9PF8 usable on both ports simultaneously?

No - the address counter (CNTEN/CNTRST) is implemented separately per port. CNTENL and CNTRSTL control the left port counter; CNTENR and CNTRSTR control the right port counter. Each can be enabled or reset independently, enabling asymmetric burst access patterns - for example, CPU reads sequential data while DSP writes scattered samples.

What is the function of the FT/PIPE pin on the 709269S9PF8?

The FT/PIPE pin selects output timing mode per port: logic LOW configures flow-through mode (data appears on Qn+1 with tCD1 delay), while logic HIGH enables pipelined mode (data appears on Qn+2 with tCD2 delay). Both modes are independently selectable per port via FT/PIPEL and FT/PIPER, allowing mixed-mode system integration.

Can the 709269S9PF8 be used in depth-expanded configurations without external logic?

Yes - the 709269S9PF8 includes dual chip enables (CE0X and CE1X per port) that allow direct depth expansion. For two-device expansion, tie CE0 of Device 1 to CE1 of Device 2 and vice versa, while sharing common address/data buses. Truth Table I in the datasheet confirms this configuration requires no additional decoding logic.