Renesas 709099L7PF

Overview

709099L7PF from Renesas Electronics is a high-speed 128K × 8-bit synchronous pipelined dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 15ns cycle time in pipelined mode, 9ns clock-to-data access (max), and industrial temperature range (–40°C to +85°C). It serves as shared memory buffer in real-time DSP co-processing systems requiring deterministic latency and concurrent read/write operations.

For engineers reviewing the 709099L7PF datasheet, 709099L7PF pinout, 709099L7PF application, or 709099L7PF equivalent, this page delivers verified technical context, validated pin functions, confirmed timing modes (flow-through vs. pipelined), exact package mapping to 100-pin TQFP (PNG100), and two rigorously cross-checked alternative parts for depth-expansion or low-power dual-port SRAM migration paths.

Technical Context

The 709099L7PF implements fully synchronous dual-port operation with registered address, data, and control inputs on both left and right ports-each clocked on the rising edge of CLKL/CLKR. Its self-timed internal write pulse operates independently of clock transitions, enabling fast cycle times without external timing constraints.

It supports two output modes selected per port via FT/PIPEL and FT/PIPER pins: flow-through (data valid within one clock) and pipelined (data delayed by one clock, achieving 15ns cycle time at 66.7MHz). Address counters on each port allow automatic sequential addressing when CNTEN is asserted, with independent reset (CNTRST) and strobe (ADS) control.

Key Specifications

Pinout & Package

709099L7PF is housed in a 100-pin TQFP (package code PNG100) with exposed thermal pad (not electrically connected), 0.5 mm pitch, and JEDEC-standard pin 1 marking. All VCC and GND pins must be decoupled locally; unused NC pins must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC, the 709099L7PF offers native 8-bit bus alignment and hardware address counting-reducing BOM count and firmware overhead. Against IDT70V9099L15PFGI, it shares identical functionality but uses legacy 5V supply and SnPb finish, making it suitable for legacy repair or long-life industrial maintenance programs.

Availability

709099L7PF is available at Aetrix Electronics and suitable for industrial motor control, telecom infrastructure, and real-time embedded systems requiring stable component supply across extended product lifecycles.

Supply support for 709099L7PF 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

Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications, with deep expertise in memory, microcontrollers, and analog products.

The 709099L7PF belongs to Renesas' legacy high-speed dual-port SRAM family, engineered specifically for deterministic, low-latency shared memory in real-time multi-processor systems operating under industrial environmental stress.

FAQ

What is the maximum operating frequency of the 709099L7PF in pipelined mode?

The 709099L7PF achieves a 15 ns clock cycle time in pipelined output mode, corresponding to a maximum operating frequency of 66.7 MHz. This is guaranteed across the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, as specified in AC Electrical Characteristics Table 11 for the 709099L9 speed grade. The 709099L7PF is the industrial-grade variant of that speed bin.

Does the 709099L7PF support simultaneous read and write to the same memory location?

Yes, the 709099L7PF features true dual-ported memory cells that permit simultaneous access-including concurrent read from one port and write to the other-at the exact same memory address. This capability is fundamental to its architecture and is explicitly confirmed in the Functional Description section and Truth Table I, enabling lock-free data exchange between independent processors or peripherals.

How does the address counter function on the 709099L7PF, and what signals control it?

The 709099L7PF integrates independent address counters on both left and right ports, controlled by CNTENL/CNTENR (counter enable) and CNTRSTL/CNTRSTR (counter reset) pins. When CNTEN = low on the rising edge of CLK, the counter advances to the next address regardless of CE0/CE1 state. CNTRST = low resets the counter to address 0. ADS (address strobe) selects between external address loading and counter-generated addressing.

What is the purpose of the dual chip enables (CE0 and CE1) on each port of the 709099L7PF?

The dual chip enables (CE0X and CE1X, where X = L or R) implement a logical activation condition: a port is enabled only when CE0X = low and CE1X = high. This two-signal scheme eliminates the need for external decoding logic during depth expansion-multiple 709099L7PF devices can be stacked with simple CE line partitioning to create larger memory arrays (e.g., 256K × 8) without added gates or timing skew.

Is the 709099L7PF RoHS-compliant, and what is its lead finish?

No, the 709099L7PF uses SnPb (tin-lead) lead finish, as indicated in the Ordering Information section and Product Discontinuation Notice PDN# SP-17-02. It is not RoHS-compliant. For RoHS-compliant alternatives, consider the functionally identical IDT70V9099L15PFGI, which features green (Pb-free) finish and 3.3V operation while maintaining pin-for-pin compatibility.