Renesas 709269L9PF8

Overview

709269L9PF8 from IDT is a 256K (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, 9ns pipelined clock-to-data access, 15ns cycle time at 67MHz, and industrial temperature support (–40°C to +85°C). It serves in real-time inter-processor communication buffers and high-speed FIFOs in telecom line cards.

For engineers reviewing the 709269L9PF8 datasheet, 709269L9PF8 pinout, 709269L9PF8 application, or 709269L9PF8 equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable architecture for depth expansion, and TTL-compatible 5V ±10% operation with separate upper/lower byte controls.

Technical Context

The 709269L9PF8 implements fully synchronous operation on both ports with 4ns setup and 1ns 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 for burst transfers.

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. The FT/PIPE pin configures either flow-through (low-latency, no pipeline delay) or pipelined (9ns tCD2, higher throughput) output mode per port, with CE0/CE1 enabling independent power-down of each port's circuitry.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package, body size 14mm × 14mm × 1.4mm. All VCC pins require connection to 5V supply; all GND pins must be grounded.

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 709269L9PF8 delivers the fastest pipelined access (9ns), retains full 5V compatibility, and uniquely integrates address counter and strobe logic-making it irreplaceable for high-frequency burst-oriented architectures.

Availability

709269L9PF8 is available at Aetrix Electronics and suitable for telecom line card buffering, real-time industrial PLC memory, automotive ADAS sensor fusion hubs, and military radar signal processing requiring stable component supply across extended lifecycle programs.

Supply support for 709269L9PF8 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 timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT7092xx family was designed specifically for deterministic, low-latency inter-processor communication in systems demanding simultaneous dual-port access-targeting telecom infrastructure, industrial automation, and defense electronics.

FAQ

What is the maximum operating frequency of the 709269L9PF8 in pipelined mode?

The 709269L9PF8 supports up to 67MHz operation in pipelined output mode, derived from its 15ns clock cycle time (tCYC2). This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) with 5.0V ±10% supply, and applies when FT/PIPE = VIH on the configured port. The 9ns clock-to-data valid (tCD2) parameter ensures deterministic timing for high-speed streaming applications.

Does the 709269L9PF8 support independent power-down of each port?

Yes, the 709269L9PF8 supports independent port power-down via dual chip enable signals per port. Asserting CE0X = VIH or CE1X = VIL for one clock cycle places that port's internal circuitry into low-power standby mode. In the L-grade variant, standby current drops to 1mW typical for both ports, making it suitable for power-gated subsystems in battery-backed or thermally constrained designs.

How does the address counter function in the 709269L9PF8?

The 709269L9PF8 incorporates independent address counters on each port controlled by CNTENX and CNTRSTX inputs. When CNTENX = VIL, the counter advances on every rising CLKX edge, generating sequential addresses for burst transfers. CNTRSTX = VIL resets the counter to address zero. The ADSX signal provides asynchronous override, loading external addresses regardless of counter state-enabling hybrid addressing modes within a single device.

Is the 709269L9PF8 pin-compatible with other members of the IDT7092xx family?

Yes, the 709269L9PF8 shares identical 100-pin TQFP (PN100) packaging and pinout with all IDT709269 and IDT709279 variants, including speed grades (9/12/15ns) and power grades (S/L). A14 is designated NC for the 709269 series (16K × 16-bit), matching the 709269L9PF8's addressing scheme. This allows direct substitution within the same package footprint when timing or power requirements change.

What is the role of the FT/PIPE pin on the 709269L9PF8?

The FT/PIPE pin configures the output behavior of each port independently: FT/PIPE = VIH selects pipelined mode (9ns tCD2, 15ns tCYC2), while FT/PIPE = VIL selects flow-through mode (20ns tCD1, 25ns tCYC1). This DC-level control allows optimization for either latency-critical (pipelined) or simplicity-focused (flow-through) system designs without hardware changes, and is sampled synchronously with the port's clock.