Renesas 709269L12PFI

Overview

709269L12PFI 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 both ports, 12ns maximum clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±10% operation. It serves as shared memory buffer in high-speed DSP-to-processor interconnects.

For engineers reviewing the 709269L12PFI datasheet, 709269L12PFI pinout, 709269L12PFI application, or 709269L12PFI 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 709269L12PFI implements fully synchronous operation on both left and right ports with 4ns setup and 1ns hold times on all control, address, and data inputs. Its internal architecture includes dedicated address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and counter reset (CNTRSTL/CNTRSTR) registers for burst-mode address generation.

It supports two distinct output modes: flow-through (FT/PIPE = VIL) with 25ns cycle time, and pipelined (FT/PIPE = VIH) with 20ns cycle time and 12ns clock-to-data valid delay. The device uses CMOS high-performance technology and features automatic power-down via CE0/CE1 control, achieving 1mA typical standby current in low-power (L) variant.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package; body dimensions 14mm × 14mm × 1.4mm; lead finish: SnPb (obsolete), RoHS-compliant green variants available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-12AXC and IDT70V9269L12PF, the 709269L12PFI uniquely retains full 5V TTL compatibility, integrated address counter, and industrial temperature qualification - making it irreplaceable in legacy industrial control and telecom infrastructure upgrades.

Availability

709269L12PFI is available at Aetrix Electronics and suitable for telecom line card buffering, DSP-to-microcontroller shared memory, and industrial PLC communication modules requiring stable component supply across extended product lifecycles.

Supply support for 709269L12PFI 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) was a fabless semiconductor company specializing in high-performance timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019.

The IDT7092xx family was designed specifically for deterministic-latency, dual-clock-domain memory sharing in real-time embedded systems - targeting telecom infrastructure, industrial automation, and digital signal processing applications.

FAQ

What is the maximum operating frequency of the 709269L12PFI in pipelined mode?

The 709269L12PFI supports up to 67MHz operation in pipelined output mode, derived from its 15ns minimum clock cycle time (tCYC2). This is confirmed in the AC Electrical Characteristics table (Table 11) under the 709279/69X12 speed grade for industrial temperature range. The device achieves this with 12ns clock-to-data valid delay (tCD2), enabling tight timing closure in high-speed synchronous systems.

Does the 709269L12PFI support independent address counters on both ports?

Yes, the 709269L12PFI provides fully independent address counters on left and right ports, each controlled by dedicated CNTENL/CNTRSTL and CNTENR/CNTRSTR signals. As shown in Truth Table II and Timing Waveform 13, counter operation is enabled when CNTENX = VIL and ADSX = VIH, allowing autonomous sequential addressing per port without external logic or software intervention.

Is A14 connected or unused on the 709269L12PFI?

A14L and A14R are No Connect (NC) pins on the 709269L12PFI, as explicitly stated in Note 1 on page 1 ("A14X is a NC for IDT709269") and confirmed in the Pin Configurations diagram (page 2). This reflects the 16K x 16-bit organization (2^14 = 16,384 addresses), where only A0–A13 are functional address lines.

How does power management work on the 709269L12PFI?

Power management on the 709269L12PFI is implemented through dual chip enables 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 low-power (L) variant, standby current is 1mA typical (ISB3), as specified in Table 9. Both ports can be independently gated, enabling granular power control in multi-port systems.

Can the 709269L12PFI be used in flow-through and pipelined modes simultaneously?

Yes, the 709269L12PFI supports mixed-mode operation: FT/PIPEL and FT/PIPER are independent control inputs, allowing left port to operate in flow-through mode (FT/PIPEL = VIL) while right port operates in pipelined mode (FT/PIPER = VIH), or vice versa. This is confirmed in Note 2 on page 3 ("FT/PIPE is independent for each port") and enables heterogeneous timing requirements across interconnected subsystems.