Renesas 709269L12PF8

Overview

709269L12PF8 from Integrated Device Technology 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 max 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 DSP co-processing and high-speed buffer applications.

For engineers reviewing the 709269L12PF8 datasheet, 709269L12PF8 pinout, 709269L12PF8 application, or 709269L12PF8 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 709269L12PF8 implements fully synchronous operation on both ports with 4ns setup and 1ns hold times 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 time independent of clock low-to-high transition timing.

It supports two configurable output modes: pipelined (9ns clock-to-data, 15ns cycle time at 67MHz) when FT/PIPE = VIH, or flow-through (25ns cycle time) when FT/PIPE = VIL. Address counter functionality - enabled via CNTEN and reset via CNTRST - allows burst-mode sequential addressing without external address generation.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package with exposed thermal pad (not electrically connected). Pin 1 marked by corner notch or dot; body size ≈14mm × 14mm × 1.4mm. 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 CY7C028V-15AXC and IDT70V9269L12PF, the 709269L12PF8 uniquely combines industrial temperature operation, 5V TTL compatibility, and active production status - making it the sole viable choice for ruggedized embedded systems requiring long lifecycle support.

Availability

709269L12PF8 is available at Aetrix Electronics and suitable for motor control real-time loop buffers, DSP co-processor shared memory, and industrial PLC I/O data exchange requiring stable component supply across extended product lifecycles.

Supply support for 709269L12PF8 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 power management ICs for communications, computing, and industrial markets.

The IDT709269 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in real-time embedded systems where concurrent access and precise timing control are critical.

FAQ

What is the maximum operating frequency of the 709269L12PF8 in pipelined mode?

The 709269L12PF8 achieves a 15ns clock cycle time in pipelined output mode, supporting up to 67MHz operation. This is confirmed in the AC Electrical Characteristics table (Table 11) under parameter tCYC2 for the X12 speed grade. The 12ns max clock-to-data (tCD2) value directly enables this frequency when combined with appropriate setup/hold margins.

Does the 709269L12PF8 support both flow-through and pipelined output modes?

Yes, the 709269L12PF8 supports both modes via the FT/PIPE pin: VIH configures pipelined mode (9ns clock-to-data, 15ns cycle time), and VIL configures flow-through mode (25ns cycle time). This is explicitly defined in the Features section and Truth Table I, with distinct AC timing parameters (tCYC1/tCD1 vs. tCYC2/tCD2) provided for each mode.

Is A14 a functional address pin on the 709269L12PF8?

No, A14 is a no-connect (NC) pin on the 709269L12PF8. The datasheet clearly states in Note 1 of the Pin Configurations section and Functional Description: "A14X is a NC for IDT709269." This reflects its 16K × 16-bit organization (14-bit address space: A0–A13), unlike the 32K × 16-bit IDT709279 which uses A14.

What is the standby current specification for the 709269L12PF8?

The 709269L12PF8 has a typical standby current of 1mA (ISB3, full standby with CMOS-level inputs), as specified in Table 9 under the "L" power variant column. This ultra-low value is achieved when both ports are disabled via CE0 = VIH and CE1 = VIL, and all inputs are held at valid logic levels - critical for power-sensitive industrial applications.

How does the address counter function on the 709269L12PF8?

The address counter advances on the rising edge of CLK when CNTEN = VIL, regardless of CE0/CE1 state. It resets to address 0 when CNTRST = VIL. This behavior is documented in Truth Table II and Figure 15, enabling burst-mode sequential access without external address generation - useful in FIFO-like buffering and DMA transfer scenarios.