Renesas 70V3579S5DRI

Overview

70V3579S5DRI from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 7.5 ns cycle time (133 MHz), true dual-port architecture enabling simultaneous read/write access to the same memory location, and independent 3.3 V or 2.5 V I/O voltage selection per port - used in high-bandwidth packet buffering and real-time DSP co-processor interfaces.

For engineers reviewing the 70V3579S5DRI datasheet, 70V3579S5DRI pinout, 70V3579S5DRI application, or 70V3579S5DRI equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation, dual-chip-enable depth expansion support, and confirmed PQFP-208 package mapping - critical for telecom line card and FPGA-based protocol accelerator designs.

Technical Context

The 70V3579S5DRI implements fully synchronous operation on both ports using edge-triggered registers for address, data, and control inputs, achieving 1.8 ns setup and 0.7 ns hold times at 133 MHz. Its pipelined output mode introduces one-cycle latency but enables deterministic 4.2 ns clock-to-data-out timing under commercial/industrial speed grades.

Each port features independent OPT pins to select 3.3 V or 2.5 V I/O interface levels, with dedicated VDDQ supplies per port, while the core remains fixed at 3.3 V. The integrated address counter supports automatic incrementing on rising CLK when CNTEN = L, and CNTRST provides synchronous reset to address 0 - eliminating external counter logic in burst-access applications.

Key Specifications

Pinout & Package

70V3579S5DRI is housed in a 208-pin PQFP package (DRG208). All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic level (3.3 V if OPT = VIH, 2.5 V if OPT = 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 CY7C1362BV33-133AXC and AS7C33256P-133JCIN, the 70V3579S5DRI uniquely delivers per-port I/O voltage selection and guaranteed 5 ns pipelined access - essential for heterogeneous SoC/FPGA systems demanding deterministic low-latency memory sharing.

Availability

70V3579S5DRI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and broadcast video equipment requiring stable component supply across extended product lifecycles.

Supply support for 70V3579S5DRI 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, is a fabless semiconductor company specializing in timing, memory interface, and RF power solutions for communications and computing markets.

The 70V3579S5DRI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data exchange between parallel processing elements in networking, DSP, and real-time control systems.

FAQ

What is the maximum operating frequency of the 70V3579S5DRI?

The 70V3579S5DRI supports a minimum clock cycle time of 7.5 ns, enabling reliable operation at 133 MHz across its industrial temperature range (-40°C to +85°C). This frequency is validated for both read and write operations with full timing margin under worst-case voltage and temperature conditions specified in the datasheet.

Does the 70V3579S5DRI support mixed-voltage operation between its two ports?

Yes, the 70V3579S5DRI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH configures the left port for 3.3 V operation (with VDDQL = 3.3 V), while setting OPTR to VIL configures the right port for 2.5 V operation (with VDDQR = 2.5 V) - enabling direct interfacing with heterogeneous logic families.

What is the function of the ADS and CNTEN signals on the 70V3579S5DRI?

ADSL/ADSR (Address Strobe Enable) loads external address values into the port's address register on the rising clock edge. CNTENL/CNTENR (Counter Enable), when held low, causes the internal address counter to auto-increment on each subsequent rising clock - enabling burst-mode sequential access without external address generation logic.

How does the pipelined output mode affect timing in the 70V3579S5DRI?

In pipelined mode, the 70V3579S5DRI outputs data one clock cycle after the address/control setup, guaranteeing a fixed 4.2–6 ns clock-to-data-out delay (tCD2). This eliminates variable propagation delays found in non-pipelined SRAMs, simplifying timing analysis and improving predictability in high-speed synchronous designs.

Is the 70V3579S5DRI pin-compatible with other members of the IDT70V3579 family?

Yes, the 70V3579S5DRI shares identical pinout and package (208-pin PQFP) with other speed grades in the IDT70V3579 family (e.g., 70V3579S4DRI and 70V3579S6DRI), allowing drop-in replacement for performance tuning or qualification across commercial and industrial temperature ranges without PCB redesign.