Renesas 70V9359L7PFI

Overview

70V9359L7PFI from Renesas Electronics (formerly IDT) is a high-speed, synchronous, pipelined dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It delivers 8K × 18-bit organization, 3.3V single-supply operation, 10ns cycle time in pipelined mode, and industrial temperature support (–40°C to +85°C), used in real-time DSP co-processing, network packet buffering, and FPGA-based protocol acceleration.

For engineers reviewing the 70V9359L7PFI datasheet, 70V9359L7PFI pinout, 70V9359L7PFI application, or 70V9359L7PFI equivalent, key selection criteria include pipelined vs. flow-through output timing, dual chip enable depth expansion capability, LVTTL-compatible 3.3V I/O, counter-enabled burst addressing, and industrial-grade thermal reliability for embedded control systems.

Technical Context

The 70V9359L7PFI implements fully synchronous operation on both ports with clocked address, data, and control registers-requiring only 3.5ns setup and 0ns hold time. Its self-timed write architecture enables minimal cycle time without external wait-state generation.

It supports two distinct output modes: pipelined (10ns cycle, 100MHz max, 6.5ns clock-to-data) and flow-through (19ns cycle, 52.6MHz max, 15ns clock-to-data), selected per port via dedicated FT/PIPE pins. Address counters with independent CNTEN/CNTRST control allow automatic sequential addressing during burst transfers.

Key Specifications

Pinout & Package

70V9359L7PFI is housed in a 100-pin Thin Quad Flatpack (TQFP) package, measuring 14 mm × 14 mm × 1.4 mm, with lead-free (green) finish and standard LVTTL-compatible pinout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-10AXC and AS7C33160B-10TIN, the 70V9359L7PFI uniquely combines 3.3V LVTTL compatibility, pipelined synchronous timing, and integrated address counters-making it optimal for FPGA- and DSP-centric designs demanding deterministic latency and burst efficiency without external logic.

Availability

70V9359L7PFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, FPGA-based accelerators, and real-time DSP subsystems requiring stable component supply amid end-of-life transitions.

Supply support for 70V9359L7PFI 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 formed from the merger of NEC Electronics, Renesas Technology, and IDT-specializing in microcontrollers, analog, power, and memory solutions for automotive, industrial, and infrastructure markets.

The 70V9359L7PFI belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between tightly coupled processors, DSPs, and FPGAs in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V9359L7PFI in pipelined mode?

The 70V9359L7PFI supports up to 100 MHz in pipelined output mode, corresponding to a 10 ns clock cycle time (tCYC2). This is validated across the industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, with all timing parameters-including 6.5 ns clock-to-data (tCD2)-guaranteed under these conditions per the official datasheet revision DSC-5638/6.

Does the 70V9359L7PFI support simultaneous read and write operations on the same memory address?

Yes, the 70V9359L7PFI uses true dual-ported SRAM cells that permit concurrent read and write access to the identical memory location-one port reading while the other writes. This behavior is intrinsic to its architecture and does not require arbitration logic, making it ideal for producer-consumer FIFO implementations and real-time data exchange between heterogeneous processors.

How does the address counter function in the 70V9359L7PFI, and what signals control it?

The 70V9359L7PFI integrates independent address counters per port, controlled by CNTENL/CNTENR (enable) and CNTRSTL/CNTRSTR (reset) inputs. When CNTEN = low on the rising clock edge, the counter advances automatically; CNTRST = low resets it to address 0. These functions operate synchronously with the port clock and are unaffected by chip enable or byte select states-enabling efficient burst transfers without external address generation.

What package type and pin count does the 70V9359L7PFI use, and is it RoHS-compliant?

The 70V9359L7PFI is packaged in a 100-pin Thin Quad Flatpack (TQFP) with 14 mm × 14 mm body and 1.4 mm height. Per the ordering information and datasheet notes, "G" suffix indicates green (lead-free, RoHS-compliant) construction. The "PFI" suffix confirms this Pb-free TQFP variant, compliant with JEDEC standards and suitable for modern assembly processes.

Can the 70V9359L7PFI be used in depth-expanded configurations, and how is this achieved?

Yes, the 70V9359L7PFI supports depth expansion using its dual chip enables (CE0 and CE1 per port). By configuring CE0/CE1 states across multiple devices-e.g., CE0L=low/CE1L=high on Device 1 and CE0L=high/CE1L=low on Device 2-the system selects banks without external decoding logic. This is explicitly documented in Truth Table I and Figure 4 of the datasheet, enabling scalable memory arrays with minimal board-level complexity.