Renesas 709269S12PFI

Overview

709269S12PFI from IDT is a 16K × 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, 12 ns maximum clock-to-data access (pipelined mode), industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% supply - used in real-time interprocessor communication and high-speed buffer applications.

For engineers reviewing the 709269S12PFI datasheet, 709269S12PFI pinout, 709269S12PFI application, or 709269S12PFI equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable support for depth expansion without external logic, and separate upper/lower byte controls for multiplexed bus compatibility.

Technical Context

The 709269S12PFI implements full synchronous operation on both ports with 4 ns setup and 1 ns hold times on all control, address, and data inputs. Its internal architecture includes dedicated address strobe (ADS), counter enable (CNTEN), and counter reset (CNTRST) logic supporting automatic address incrementing and zero-reset functionality independent of external address changes.

Each port features independent clock (CLKL/CLKR), read/write (R/WL/R/WR), output enable (OEL/OER), and byte-select (UBL/UBR, LBL/LBR) signals, with dual chip enables (CE0X/CE1X) allowing selective power-down per port. The FT/PIPE pin configures either flow-through (direct output) or pipelined (one-cycle delayed output) behavior per port, with CE signal buffering dependent on FT/PIPE state.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm × 1.4 mm body, lead-free (Green) option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC, the 709269S12PFI provides guaranteed industrial temperature operation and 5 V compatibility, while IDT70V9269S12PFI offers identical functionality with reduced power and enhanced robustness - making it the optimal choice for new designs requiring long-term supply stability.

Availability

709269S12PFI is available at Aetrix Electronics and suitable for real-time interprocessor communication, high-speed data acquisition buffers, and industrial motor control systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 709269S12PFI 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 timing, memory interface, RF, and high-performance interconnect solutions, now part of Renesas Electronics since 2019.

The IDT709269 family was designed specifically for deterministic, low-latency shared-memory architectures in industrial automation, test equipment, and communications infrastructure - emphasizing simultaneous dual-port access, synchronous timing control, and robust 5 V operation.

FAQ

What is the maximum operating frequency of the 709269S12PFI in pipelined mode?

The 709269S12PFI supports a maximum operating frequency of 50 MHz in pipelined output mode, derived from its 20 ns minimum 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, enabling deterministic high-throughput data exchange between synchronized processors or controllers without cycle-stretching.

Does the 709269S12PFI support independent power-down of each port?

Yes, the 709269S12PFI supports independent port power-down using its dual chip enable architecture: asserting CE0X = high or CE1X = low for one clock cycle disables the corresponding port's internal circuitry. This reduces standby current to 5 mW typ. per powered-down port, enabling dynamic power management in multi-processor systems where one side may be idle while the other remains active.

How does the address counter function in the 709269S12PFI?

The address counter in the 709269S12PFI advances automatically when CNTENX = low on the rising edge of CLKX, regardless of CE or byte-enable states. CNTRSTX = low resets the counter to address 0. This hardware counter operates independently of external address buses and ADS signals, enabling efficient burst-mode sequential access - particularly valuable in FIFO or circular buffer implementations where host CPU overhead must be minimized.

Can the 709269S12PFI be used in a 32-bit data path configuration?

Yes, the 709269S12PFI can be configured for 32-bit data paths using width expansion: two devices operate in parallel with shared clocks and controls, where one handles I/O0–I/O15 and the other handles I/O16–I/O31 (via external wiring). Its separate upper-byte (UB) and lower-byte (LB) controls per port ensure precise 8-bit granularity, and dual CE pins simplify enable logic for multi-device banks without additional decoding logic.

Is the 709269S12PFI pin-compatible with other members of the IDT709269 family?

Yes, the 709269S12PFI is pin-compatible with all speed grades (9 ns, 12 ns, 15 ns) and power variants (S/L) in the IDT709269 family sharing the 100-pin TQFP package (e.g., 709269L12PFI, 709269S15PFI). Differences are limited to AC timing parameters and power consumption - allowing direct substitution in existing PCB layouts when performance or thermal requirements change, provided system timing margins accommodate the selected speed grade.