Renesas 70V3579S4DRG

Overview

70V3579S4DRG from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 4.2 ns clock-to-data access (max), 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, FPGA co-processor data exchange, and real-time DSP inter-processor communication.

For engineers reviewing the 70V3579S4DRG datasheet, 70V3579S4DRG pinout, 70V3579S4DRG application, or 70V3579S4DRG equivalent, key selection criteria include pipelined latency timing, dual-port depth expansion capability via dual chip enables, byte-selectable 9-bit-wide I/O control, and industrial-grade (-40°C to +85°C) operation with selectable VDDQ per port.

Technical Context

This device implements true dual-port SRAM cells with fully synchronous operation on both ports, using edge-triggered registers for address, data, and all control inputs-including CE0/CE1, R/W, BE0–BE3, ADS, CNTEN, and CNTRST. The pipelined output mode introduces one-cycle latency between clock and valid data output, enabling deterministic timing at 133 MHz.

Each port supports independent I/O voltage configuration (3.3 V or 2.5 V) via dedicated OPTL/OPTR pins and corresponding VDDQL/VDDQR supplies, while the core VDD remains fixed at 3.3 V. Internal address counter logic allows autonomous sequential addressing when CNTEN is asserted, decoupling burst transfers from external address bus management.

Key Specifications

Pinout & Package

70V3579S4DRG is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body size. Pin functions are symmetrically organized across left (L) and right (R) ports, each with dedicated clock, address, data I/O, control, and power domains.

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 70V3579S4DRG delivers higher bandwidth (133 MHz vs. 100 MHz), deterministic pipelined latency (4.2 ns), and per-port I/O voltage flexibility-critical for heterogeneous SoC/FPGA integration where voltage domain isolation matters.

Availability

70V3579S4DRG is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA-based prototyping, and industrial motion control applications requiring stable component supply across extended product lifecycles.

Supply support for 70V3579S4DRG 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 70V3579S4DRG belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency data sharing between independent processors, FPGAs, or ASICs in real-time systems.

FAQ

What is the maximum operating frequency of the 70V3579S4DRG?

The 70V3579S4DRG supports up to 133 MHz operation, derived from its 7.5 ns clock cycle time (tCYC2). This is achievable under commercial temperature conditions with proper signal integrity and power delivery; the industrial-grade version maintains 133 MHz performance across -40°C to +85°C.

Does the 70V3579S4DRG support independent I/O voltage selection on each port?

Yes-the 70V3579S4DRG supports independent 3.3 V or 2.5 V I/O operation per port via OPTL and OPTR pins. When OPTL = VIH, VDDQL must be 3.3 V; when OPTL = VIL, VDDQL must be 2.5 V. The same applies to OPTR/VDDQR. Core VDD remains fixed at 3.3 V.

How does the address counter function in the 70V3579S4DRG?

The 70V3579S4DRG includes an internal 15-bit address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising CLK edge, the counter advances automatically. CNTRST = VIL resets it to address 0. This enables burst transfers without external address increment logic.

What package type is used for the 70V3579S4DRG?

The 70V3579S4DRG is supplied in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and 28 mm × 28 mm body size. Pinout matches the DRG208 package variant documented in IDT's DSC 4830 datasheet revision August 2019.

Is the 70V3579S4DRG suitable for industrial temperature applications?

Yes-the 70V3579S4DRG is qualified for industrial temperature operation from -40°C to +85°C. This is confirmed in the datasheet's "Recommended Operating Temperature" table and supported by AC/DC specifications tested across that range, including ISB2 and ISB4 standby currents.