Renesas 709269S12PFI8

Overview

709269S12PFI8 from IDT is a 16K × 16-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports, 12ns maximum clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±10% supply - used in real-time interprocessor communication and high-speed buffer applications.

For engineers reviewing the 709269S12PFI8 datasheet, 709269S12PFI8 pinout, 709269S12PFI8 application, or 709269S12PFI8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-port depth expansion capability via CE0/CE1 control, byte-select granularity (UB/LB), and industrial-grade reliability for embedded control systems.

Technical Context

The 709269S12PFI8 implements fully synchronous operation on both ports with registered address, data, and control inputs - all sampled on the rising edge of CLKL/CLKR - delivering 4ns setup and 1ns hold times. Its self-timed write architecture enables fast cycle time independent of clock low time.

It supports two configurable output modes: pipelined (FT/PIPE = VIH, 9ns tCD2, 20ns tCYC2) or flow-through (FT/PIPE = VIL, 25ns tCD1, 30ns tCYC1), with separate upper-byte (UBR/UBL) and lower-byte (LBR/LBL) controls for multiplexed bus compatibility and precise data masking.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), 14mm × 14mm × 1.4mm body, lead-free (green) compliant, with exposed thermal pad (not electrically connected).

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 IDT70V9269S12PFI, the 709269S12PFI8 provides guaranteed industrial temperature operation and native 5V TTL compatibility - critical for retrofitting into legacy avionics, industrial PLCs, and medical equipment where voltage translation adds cost and failure risk.

Availability

709269S12PFI8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, industrial motion control, avionics data acquisition, and medical imaging frame storage requiring stable component supply across extended product lifecycles.

Supply support for 709269S12PFI8 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, RF, and interface solutions for communications, computing, and industrial markets.

The IDT7092xx family was designed specifically for deterministic, low-latency dual-processor and real-time control architectures - emphasizing simultaneous access, pipelined throughput, and industrial reliability over cost-optimized commodity SRAM.

FAQ

What is the maximum operating frequency of the 709269S12PFI8 in pipelined mode?

The 709269S12PFI8 supports a maximum clock frequency of 50MHz in pipelined output mode, derived from its 20ns maximum clock cycle time (tCYC2). This timing is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0V ±10% supply, making it suitable for deterministic real-time systems where jitter-sensitive throughput is required. The 709269S12PFI8 achieves this with 9ns clock-to-data valid delay (tCD2) and 6ns minimum clock high/low times.

Does the 709269S12PFI8 support independent clock domains for left and right ports?

Yes, the 709269S12PFI8 supports fully independent clock domains: CLKL drives the left port and CLKR drives the right port. Each port has its own set of registered inputs (address, data, control), allowing asynchronous operation between ports - essential for interprocessor communication where CPUs run at different frequencies or phases. The 709269S12PFI8 maintains strict setup/hold timing (4ns/1ns) relative to its respective clock edge, with no inter-port clock synchronization requirement.

How does the address counter function in the 709269S12PFI8, and can it be used with either port?

The 709269S12PFI8 integrates independent 14-bit address counters for each port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTENX = low, the counter advances on each rising CLKX edge, generating sequential addresses without external address bus updates. ADSX can override the counter to load an external address. This feature is fully symmetric - both ports support autonomous burst access, and the 709269S12PFI8's counter logic operates identically on left and right sides.

Is the 709269S12PFI8 pin-compatible with other members of the IDT7092xx family?

The 709269S12PFI8 is pin-compatible with all 100-pin TQFP variants in the IDT709269/709279 family, including speed grades (9ns, 12ns, 15ns) and power variants (S/L). Pin assignments for CLK, address, I/O, CE, R/W, OE, UB/LB, and FT/PIPE are identical across the family. However, A14 is No Connect on 709269S12PFI8 (16K×16) but functional on 709279S12PFI8 (32K×16), so PCB layout must account for this difference when substituting part numbers.

What power-saving features does the 709269S12PFI8 provide during idle periods?

The 709269S12PFI8 offers multi-level power management: full standby (ISB3 = 1.0mA typ.) activates when both CE0 and CE1 are deasserted to high-impedance states (CE0 = VIH, CE1 = VIL), disabling all internal circuitry; partial standby (ISB4 = 120mA typ.) engages when only one port is enabled. Additionally, the automatic power-down feature responds to CE0/CE1 transitions within one clock cycle, and the 709269S12PFI8 draws just 5mW typical in full standby - critical for battery-backed or thermally constrained systems.