Renesas 70V3579S5BF8

Overview

70V3579S5BF8 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, 7.5 ns cycle time (133 MHz), and selectable 3.3 V or 2.5 V I/O interface per port - used in real-time packet buffering for telecom line cards and FPGA co-processor data exchange.

For engineers reviewing the 70V3579S5BF8 datasheet, 70V3579S5BF8 pinout, 70V3579S5BF8 application, or 70V3579S5BF8 equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation, dual-chip-enable depth expansion support, and confirmed 208-pin PQFP package mapping - critical for deterministic latency systems requiring concurrent read/write on independent buses.

Technical Context

The 70V3579S5BF8 implements fully synchronous operation on both ports with clocked address, data, and control registers - enabling 1.8 ns setup and 0.7 ns hold times at 133 MHz. Its pipelined output mode introduces one-cycle latency between clock edge and valid data output, while self-timed write logic maintains fast cycle time without external wait-state generation.

Each port features independent OPT pins to configure its VDDQ supply (3.3 V or 2.5 V), allowing mixed-voltage interfacing with legacy 3.3 V and modern 2.5 V logic families. The integrated address counter supports automatic address increment on CNTEN assertion, eliminating external sequencing logic for burst transfers.

Key Specifications

Pinout & Package

208-pin PQFP package (DRG208), body size 28 mm × 28 mm × 3.5 mm, 0.65 mm lead pitch. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR voltage selection (3.3 V or 2.5 V).

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-10JIN, the 70V3579S5BF8 uniquely delivers 133 MHz pipelined operation in a 208-pin PQFP with per-port voltage selection - enabling higher bandwidth, lower jitter, and mixed-voltage interoperability without layout redesign.

Availability

70V3579S5BF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data acquisition requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V3579S5BF8 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, specializes in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 70V3579S5BF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic-latency applications demanding concurrent access, burst throughput, and industrial-grade reliability.

FAQ

What is the maximum operating frequency of the 70V3579S5BF8?

The 70V3579S5BF8 supports up to 133 MHz operation with a guaranteed 7.5 ns clock cycle time in pipelined mode. This is validated across the industrial temperature range (-40°C to +85°C) and applies to both ports simultaneously under specified supply and loading conditions.

Does the 70V3579S5BF8 support mixed-voltage operation between its two ports?

Yes, the 70V3579S5BF8 supports independent I/O voltage selection per port via OPTL and OPTR pins. One port can operate at 3.3 V while the other uses 2.5 V - enabling direct interfacing with heterogeneous logic families without level shifters.

What package type is used for the 70V3579S5BF8?

The 70V3579S5BF8 is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with dimensions 28 mm × 28 mm × 3.5 mm and 0.65 mm lead pitch. This package is explicitly designated as DRG208 in IDT documentation and is distinct from BGA variants.

How does the address counter function in the 70V3579S5BF8?

The 70V3579S5BF8 includes a synchronous address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising CLK edge, the internal address increments automatically - eliminating external counter logic for sequential burst reads/writes.

What is the purpose of the dual chip enable (CE0/CE1) architecture in the 70V3579S5BF8?

The dual CE architecture (CE0 and CE1 per port) enables depth expansion across multiple 70V3579S5BF8 devices using only chip-select signals - no additional address decoding logic is needed. CE0 = VIH and CE1 = VIL also places the port in ultra-low-power standby mode (<15 mA).