Renesas 70V3579S6BCI

Overview

70V3579S6BCI from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 6 ns max clock-to-data access, 7.5 ns cycle time (133 MHz), and independent 3.3 V or 2.5 V I/O voltage selection per port. It enables simultaneous read/write access to the same memory location in telecom packet buffering and FPGA co-processor interconnect applications.

For engineers reviewing the 70V3579S6BCI datasheet, 70V3579S6BCI pinout, 70V3579S6BCI application, or 70V3579S6BCI equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation, dual-port counter control, byte-selectable write enable, and PQFP-208 package implementation details critical for real-time data exchange systems.

Technical Context

The 70V3579S6BCI implements fully synchronous dual-port operation with registered address, data, and control inputs on both left and right ports-enabling minimal setup (1.8 ns) and hold (0.7 ns) times at 133 MHz. Its pipelined output mode introduces one-cycle latency for deterministic timing closure in burst-mode systems.

Each port supports independent VDDQ selection (3.3 V or 2.5 V) via OPTL/OPTR pins, allowing mixed-voltage system integration without level shifters. The integrated address counter-with CNTEN and CNTRST controls-enables sequential memory access without external logic, reducing FPGA resource usage in streaming applications.

Key Specifications

Pinout & Package

70V3579S6BCI is housed in a 208-pin PQFP package (DRG208 footprint) with 0.65 mm lead pitch and 28 mm × 28 mm body size. Power and ground pins are distributed across all four sides for low-impedance decoupling; VDD (core) and VDDQ (I/O) supplies are physically segregated to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100AXC and AS7C33256B-12JCIN, the 70V3579S6BCI uniquely delivers per-port VDDQ selection, pipelined output determinism, and integrated address counter-reducing BOM count and PCB area in mixed-voltage, high-throughput embedded systems.

Availability

70V3579S6BCI is available at Aetrix Electronics and suitable for telecom infrastructure, medical imaging equipment, and avionics data recorders requiring stable component supply across extended product lifecycles.

Supply support for 70V3579S6BCI 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 70V3579S6BCI belongs to IDT's high-speed synchronous dual-port SRAM family, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V3579S6BCI?

The 70V3579S6BCI supports a minimum cycle time of 12 ns, corresponding to a maximum operating frequency of 83.3 MHz in pipelined mode. This is validated across the industrial temperature range (-40°C to +85°C) and aligns with the "S6" speed grade designation in the part number. The device achieves 133 MHz effective bandwidth through its 7.5 ns cycle time specification under specific timing conditions, but 83.3 MHz is the guaranteed maximum sustained clock rate for full functionality.

Does the 70V3579S6BCI support independent voltage levels on its two ports?

Yes, the 70V3579S6BCI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V LVTTL operation with VDDQL = 3.3 V, while setting OPTR to VIL (0 V) configures the right port for 2.5 V operation with VDDQR = 2.5 V. This capability enables direct interfacing with mixed-voltage SoCs and FPGAs without external level shifters.

How does the address counter function in the 70V3579S6BCI?

The 70V3579S6BCI integrates an on-chip address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR signals. When CNTEN = VIL on the rising edge of CLK, the counter advances automatically-bypassing the external address bus. CNTRST asynchronously resets the counter to address 0. This feature eliminates external counter logic in sequential-access applications such as video line buffers or packet header parsing, reducing FPGA resource usage and PCB complexity.

What package type is used for the 70V3579S6BCI?

The 70V3579S6BCI is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with a 28 mm × 28 mm body and 0.65 mm lead pitch (package code DRG208). This RoHS-compliant, green-part-qualified package provides robust thermal performance and is compatible with standard surface-mount assembly processes used in industrial and telecom manufacturing.

Is the 70V3579S6BCI suitable for industrial temperature applications?

Yes, the 70V3579S6BCI is rated for industrial temperature operation from -40°C to +85°C. This rating is explicitly confirmed in the datasheet's "Recommended Operating Temperature" table and supported by DC/AC electrical characteristics tested across that range. The "I" suffix in the full ordering part (e.g., 70V3579S6BCI) denotes industrial temperature qualification, making it suitable for base stations, factory automation controllers, and other harsh-environment deployments.