Renesas 70V3579S5BFI

Overview

70V3579S5BFI from Integrated Device Technology is a high-speed 32K × 36-bit synchronous dual-port static RAM with pipelined output, 5 ns max clock-to-data access (industrial grade), 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 70V3579S5BFI datasheet, 70V3579S5BFI pinout, 70V3579S5BFI application, or 70V3579S5BFI equivalent, key selection criteria include pipelined latency timing, dual-port counter enable/reset functionality, byte-selectable 9-bit-wide I/O banks, industrial temperature support (−40°C to +85°C), and PQFP-208 package compatibility with depth-expansion logic.

Technical Context

The 70V3579S5BFI implements full synchronous operation on both ports using edge-triggered registers for address, data, and all control signals-including CE0/CE1, R/W, BE0–BE3, ADS, CNTEN, and CNTRST-ensuring deterministic setup/hold timing at 133 MHz. Its pipelined output mode introduces one-cycle latency between clock edge and valid data output, while self-timed write logic maintains minimal cycle time regardless of write-enable assertion timing.

Each port supports independent I/O voltage selection (3.3 V or 2.5 V) via dedicated OPTL/OPTR pins and corresponding VDDQL/VDDQR supplies, enabling mixed-voltage system interfacing without level shifters. The internal address counter operates independently per port and advances on CLK rising edge when CNTEN = L, irrespective of CE or BE states.

Key Specifications

Pinout & Package

70V3579S5BFI 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 distributed across left (L) and right (R) ports, each with dedicated address, data, 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 CY7C1362BV33-5BC and AS7C33256P-10TIN, the 70V3579S5BFI uniquely delivers industrial-grade 5 ns pipelined access with per-port 2.5 V/3.3 V I/O selection and integrated address counter-enabling lower-system-cost, higher-performance designs in telecom and embedded control.

Availability

70V3579S5BFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3579S5BFI 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, RF, and power management solutions for communications and computing markets.

The 70V3579S5BFI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor and FPGA-to-ASIC data exchange in mission-critical embedded systems.

FAQ

What is the maximum operating frequency of the 70V3579S5BFI?

The 70V3579S5BFI supports a 133 MHz maximum operating frequency, derived from its 7.5 ns minimum clock cycle time (tCYC2) in pipelined mode. This frequency is guaranteed across the full industrial temperature range (−40°C to +85°C) and applies to both ports simultaneously under specified voltage and load conditions.

Does the 70V3579S5BFI support independent I/O voltage selection on each port?

Yes, the 70V3579S5BFI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIL (0 V) configures the left port for 2.5 V I/O operation with VDDQL = 2.5 V, while OPTR = VIH (3.3 V) configures the right port for 3.3 V I/O with VDDQR = 3.3 V-enabling mixed-voltage system integration without external level shifters.

How does the address counter function in the 70V3579S5BFI?

The 70V3579S5BFI includes an internal 15-bit address counter per port, enabled by CNTENL/CNTENR. When CNTEN = L and ADS = H, the counter increments on each CLK↑ edge, generating sequential addresses without external bus activity. ADS = L overrides the counter and loads external address A0–A14, allowing flexible burst-and-random access modes within a single device.

What is the purpose of the dual chip enable (CE0/CE1) configuration in the 70V3579S5BFI?

The dual chip enable (CE0/CE1) configuration in the 70V3579S5BFI enables depth expansion across multiple devices without external logic. CE0 = L and CE1 = H activates the port; CE0 = H and CE1 = L places it in low-power standby; CE0 = CE1 = H fully deselects the port. This allows stacking multiple 70V3579S5BFI units to build wider or deeper memory arrays using only two control lines per port.

Is the 70V3579S5BFI pin-compatible with other members of the 70V3579 family?

Yes, the 70V3579S5BFI shares identical pinout and package (208-pin PQFP) with other speed grades in the 70V3579 family-including 70V3579S4BFI (4.2 ns) and 70V3579S6BFI (6 ns)-enabling drop-in replacement for performance tuning or qualification flexibility without PCB redesign.