Renesas 70V3579S5BF

Overview

70V3579S5BF from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, true dual-port memory cells enabling simultaneous access to the same address, 4.2 ns clock-to-data access (max), and 133 MHz operation at 7.5 ns cycle time. It supports independent 3.3 V or 2.5 V I/O voltage selection per port via OPT pins and operates across industrial temperature range (–40°C to +85°C) in a 208-pin PQFP package.

For engineers reviewing the 70V3579S5BF datasheet, 70V3579S5BF pinout, 70V3579S5BF application, or 70V3579S5BF equivalent, this device serves as a low-latency, burst-capable memory buffer in real-time DSP inter-processor communication, FPGA co-processor data exchange, high-throughput packet buffering, and deterministic control loop memory sharing where concurrent read/write on separate ports is required.

Technical Context

The 70V3579S5BF implements fully synchronous dual-port operation with registered address, data, and control inputs on both left and right ports, enabling minimal setup/hold times (1.8 ns setup, 0.7 ns hold @ 133 MHz). Its pipelined output mode introduces one-cycle latency for deterministic timing, while self-timed write logic maintains fast cycle time without external wait-state generation.

Each port features independent chip enables (CE0/CE1), byte enables (BE0–BE3), address strobe (ADS), counter enable/reset, and selectable I/O supply (VDDQ = 3.3 V or 2.5 V) controlled by dedicated OPT pins. The internal 15-bit address counter supports auto-incrementing reads/writes without external address bus management.

Key Specifications

Pinout & Package

70V3579S5BF is housed in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body size. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic levels (3.3 V if VIH, 2.5 V if VIL); all VSS pins connect to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100AXC and AS7C33256PFS-10BIN, the 70V3579S5BF delivers superior timing determinism via pipelining, flexible mixed-voltage I/O per port, and integrated address counter-enabling tighter control loop cycles and simplified system integration in real-time embedded applications.

Availability

70V3579S5BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, aerospace avionics, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-grade qualification.

Supply support for 70V3579S5BF 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V3579S5BF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems demanding concurrent memory access.

FAQ

What is the maximum operating frequency of the 70V3579S5BF?

The 70V3579S5BF supports up to 133 MHz operation with a minimum clock cycle time of 7.5 ns. This is achieved under industrial temperature conditions (–40°C to +85°C) and confirmed by AC electrical specifications in the datasheet. The device maintains full functionality-including pipelined output and self-timed write-at this speed without derating.

Does the 70V3579S5BF support independent voltage selection on each port?

Yes, the 70V3579S5BF supports independent I/O voltage selection per port using OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V signaling with VDDQL = 3.3 V, while setting OPTR to VIL (0 V) configures the right port for 2.5 V signaling with VDDQR = 2.5 V. This enables direct interfacing with mixed-voltage FPGAs or ASICs.

How does the address counter function in the 70V3579S5BF?

The 70V3579S5BF includes an internal 15-bit address counter per port, enabled by CNTENL/CNTENR. When asserted low on the rising clock edge, the counter automatically increments the internal address, allowing sequential memory access without external address bus updates. CNTRSTL/CNTRSTR asynchronously resets the counter to zero, supporting burst-mode initialization.

What package type is used for the 70V3579S5BF?

The 70V3579S5BF is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body dimensions. This package is explicitly designated in the datasheet as DRG208 and supports standard surface-mount reflow processes. It is distinct from the 208-pin fpBGA (BF208) and 256-pin BGA (BC256) variants.

Is the 70V3579S5BF suitable for industrial temperature applications?

Yes, the 70V3579S5BF is qualified for industrial temperature operation from –40°C to +85°C. This is confirmed by its "S5" speed grade designation, AC/DC electrical specifications tested across that range, and explicit listing in the Recommended Operating Conditions table. It meets industrial reliability requirements for extended thermal cycling and long-term operation.