Renesas 709269L12PFI8

Overview

709269L12PFI8 from Integrated Device Technology 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 maximum clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±10% supply - used in high-speed inter-processor communication and real-time DSP buffering.

For engineers reviewing the 709269L12PFI8 datasheet, 709269L12PFI8 pinout, 709269L12PFI8 application, or 709269L12PFI8 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 verified 15ns cycle time at 67MHz operation in pipelined mode.

Technical Context

The 709269L12PFI8 implements fully synchronous operation on both ports with 4ns setup and 1ns hold times on all control, address, and data inputs, using edge-triggered registers clocked on the rising edge of CLKL/CLKR. Its self-timed internal write pulse operates independently of clock transitions, enabling minimal cycle time.

It supports two distinct output modes: flow-through (FT/PIPE = VIL) with 25ns min cycle time, and pipelined (FT/PIPE = VIH) with 20ns min cycle time and 9ns clock-to-data valid delay; address counter advance is controlled synchronously via CNTEN and CNTRST pins with ADS-driven external address loading.

Key Specifications

Pinout & Package

709269L12PFI8 is housed in a 100-pin Thin Quad Flatpack (TQFP) package measuring 14mm × 14mm × 1.4mm, with exposed pad not electrically connected; all VCC and GND pins require local decoupling per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V9269L12PF and CY7C026V-12AXC, the 709269L12PFI8 provides guaranteed industrial-temperature operation with native 5V TTL compatibility and integrated address counter - making it the sole option for legacy 5V control systems requiring auto-increment burst transfers without external logic.

Availability

709269L12PFI8 is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial PLC communication buffering, and automotive ADAS sensor fusion hubs requiring stable component supply across extended product lifecycles.

Supply support for 709269L12PFI8 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, and RF solutions for communications and computing infrastructure.

The IDT709269 family was designed specifically for high-reliability, low-latency inter-processor communication in industrial control, aerospace, and test equipment - emphasizing deterministic timing, dual-port concurrency, and robust 5V operation.

FAQ

What is the maximum operating frequency of the 709269L12PFI8 in pipelined mode?

The 709269L12PFI8 supports up to 67MHz operation in pipelined output mode, derived from its 15ns minimum cycle time specification. This frequency is achievable under industrial temperature conditions (–40°C to +85°C) with 5.0V ±10% supply and proper PCB layout per IDT's recommended design rules. The 709269L12PFI8 achieves this using a self-timed write pulse that decouples internal timing from clock duty cycle constraints.

Does the 709269L12PFI8 support independent byte enables for 8-bit data transfers?

Yes, the 709269L12PFI8 provides separate upper-byte (UB) and lower-byte (LB) controls per port - UBL/LBL on the left port and UBR/LBR on the right port. These TTL-compatible signals allow selective gating of I/O0–I/O7 (lower byte) and I/O8–I/O15 (upper byte) during read or write cycles, enabling 8-bit microcontroller interfacing and bus-matching in mixed-width systems without external logic.

How does the address counter function on the 709269L12PFI8?

The 709269L12PFI8 includes synchronous address counters on both ports, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTENX = VIL on the rising CLK edge, the internal address advances automatically; CNTRSTX = VIL resets to address 0. ADSX remains active for external address loading, allowing hybrid operation - the 709269L12PFI8 uses this for burst transfers in DSP and data acquisition applications.

Is the 709269L12PFI8 pin-compatible with other members of the IDT709269 family?

Yes, the 709269L12PFI8 shares identical 100-pin TQFP pinout with all speed grades (9ns, 12ns, 15ns) and power variants (S/L) of the IDT709269 family, including 709269S12PFI8 and 709269L9PFI8. A14 is designated NC across all variants per datasheet note 1, ensuring drop-in replacement within the same speed grade and temperature range without PCB modification.

What power-saving modes does the 709269L12PFI8 support?

The 709269L12PFI8 offers three standby modes: ISB1 (both ports deselected, 50mA typ), ISB2 (one port active, 130mA typ), and ISB3 (full CMOS standby, 1mA typ). Power reduction is achieved by asserting CE0X = VIH or CE1X = VIL for one clock cycle, which disables internal circuitry per port. The 709269L12PFI8 achieves its 1mA ISB3 rating using low-leakage CMOS design, validated across the full –40°C to +85°C range.