Renesas 70V3579S6BF

Overview

70V3579S6BF 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, 4.2 ns clock-to-data access (max), and 133 MHz operation at 7.5 ns cycle time. It supports independent 3.3 V or 2.5 V I/O voltage per port via OPT pins and operates across industrial temperature range (–40°C to +85°C) in a 208-pin PQFP package.

For engineers reviewing the 70V3579S6BF datasheet, 70V3579S6BF pinout, 70V3579S6BF application, or 70V3579S6BF equivalent, key selection considerations include its synchronous pipelined timing architecture, dual-chip-enable depth expansion capability, separate byte enables for multiplexed bus compatibility, and low-power standby modes enabled by CE0/CE1 control.

Technical Context

The 70V3579S6BF implements full synchronous operation on both ports using edge-triggered registers for address, data, and all control inputs-including R/W, CE0/CE1, BE0–BE3, ADS, CNTEN, and CNTRST-ensuring minimal setup (1.8 ns) and hold (0.7 ns) times at 133 MHz. Its pipelined output mode introduces one-cycle latency between clock and valid data output.

It features an internal address counter with independent enable (CNTEN) and reset (CNTRST) per port, allowing burst-mode sequential access without external address generation. The dual-chip-enable architecture permits seamless depth expansion without additional logic, while separate VDDQ supplies and OPT pins allow mixed-voltage interfacing (3.3 V/2.5 V) on left and right ports independently.

Key Specifications

Pinout & Package

70V3579S6BF is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5 mm lead pitch and body dimensions of 28 mm × 28 mm × 3.5 mm. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic level (3.3 V for VIH, 2.5 V for 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 CY7C1362BV33-167BZXI and IDT70V27L25PF8, the 70V3579S6BF uniquely balances 133 MHz synchronous performance, per-port I/O voltage selection, and integrated address counter-making it optimal for thermally demanding, mixed-voltage embedded systems requiring deterministic low-latency dual-port access.

Availability

70V3579S6BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and real-time DSP co-processing applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3579S6BF 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 ICs for communications, computing, and industrial markets.

The 70V3579S6BF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic, low-latency, concurrent memory access between heterogeneous processors or data paths.

FAQ

What is the maximum operating frequency supported by the 70V3579S6BF?

The 70V3579S6BF supports up to 133 MHz operation, corresponding to a 7.5 ns clock cycle time in pipelined mode. This is validated for the S6 speed grade across commercial and industrial temperature ranges. The device achieves this with 1.8 ns address setup and 0.7 ns hold times, enabling robust timing margin in high-speed synchronous designs.

Does the 70V3579S6BF support independent voltage supplies for each port?

Yes, the 70V3579S6BF supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures VDDQL for 3.3 V operation; setting it to VIL (0 V) configures VDDQL for 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 70V3579S6BF?

The 70V3579S6BF includes a per-port address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising CLK edge, the counter advances automatically-bypassing external address bus changes. ADSL/ADSR can override with external addresses. This enables efficient burst transfers without CPU intervention.

What power-saving modes are available on the 70V3579S6BF?

The 70V3579S6BF offers four standby modes via CE0/CE1 combinations: ISB1 (both ports TTL-disabled), ISB2 (one port active), ISB3 (full CMOS standby, 6 mA typ), and ISB4 (one port CMOS-standby). ISB3 is ideal for deep sleep; ISB2 maintains responsiveness on one port while minimizing current draw on the other.

Is the 70V3579S6BF pin-compatible with other members of the 70V3579 family?

Yes, the 70V3579S6BF shares identical pinout and package (208-pin PQFP) with other speed grades (e.g., 70V3579S4BF, 70V3579S5BF) and voltage variants in the same package. Functionally identical pin mapping ensures drop-in replacement across speed grades without PCB revision-only timing and power validation required.