Renesas 70V3569S4BF8

Overview

70V3569S4BF8 from Integrated Device Technology is a high-speed 16K × 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 switching fabric and network packet buffering applications.

For engineers reviewing the 70V3569S4BF8 datasheet, 70V3569S4BF8 pinout, 70V3569S4BF8 application, or 70V3569S4BF8 equivalent, key selection criteria include dual-port pipelined timing compliance, byte-selectable 36-bit I/O interface, industrial-grade temperature support (−40°C to +85°C), and PQFP-208 package compatibility with depth-expansion logic.

Technical Context

The 70V3569S4BF8 implements full synchronous operation on both ports using edge-triggered registers for address, data, and control inputs-enabling minimal setup (1.8 ns) and hold (0.7 ns) times at 133 MHz. Its pipelined output mode introduces one-cycle latency for deterministic timing closure in burst-mode systems.

Each port features independent chip enables (CE0/CE1), byte enables (BE0–BE3), address strobe (ADS), counter enable/reset, and selectable I/O voltage (3.3 V or 2.5 V via OPTL/OPTR pins), allowing mixed-voltage interoperation between legacy and low-voltage subsystems without level shifters.

Key Specifications

Pinout & Package

70V3569S4BF8 is housed in a 208-pin PQFP package (DRG208) with 28 mm × 28 mm footprint and 0.65 mm lead pitch. Pin assignments are symmetrically organized into left (L) and right (R) port groups, 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 CY7C1362BV33-167BZI and AS7C3316PFS-15JIN, the 70V3569S4BF8 uniquely delivers 4.2 ns pipelined access in an industrial-rated PQFP package with per-port 2.5 V/3.3 V I/O selection-enabling drop-in replacement in legacy designs while supporting next-gen mixed-voltage architectures.

Availability

70V3569S4BF8 is available at Aetrix Electronics and suitable for telecom switching fabric, network packet buffering, FPGA-based protocol accelerators, and industrial real-time control buffers requiring stable component supply across extended product lifecycles.

Supply support for 70V3569S4BF8 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 RF solutions for communications, computing, and industrial markets.

The 70V3569S4BF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory access in carrier-grade networking and real-time embedded systems.

FAQ

What is the maximum operating frequency supported by the 70V3569S4BF8?

The 70V3569S4BF8 supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns clock cycle time (tCYC2). This is guaranteed across the commercial temperature range (0°C to +70°C) and validated under full load with proper termination and decoupling. The device achieves 9.6 Gbps aggregate bandwidth across both ports at this rate.

Does the 70V3569S4BF8 support independent voltage operation on its two ports?

Yes, the 70V3569S4BF8 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 I/O operation (requiring VDDQL = 3.3 V), while setting OPTR to VIL configures the right port for 2.5 V I/O operation (requiring VDDQR = 2.5 V). This enables mixed-voltage system integration without external level shifters.

What package type is used for the 70V3569S4BF8, and what are its mechanical dimensions?

The 70V3569S4BF8 is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with a 28 mm × 28 mm body size and 0.65 mm lead pitch. The package complies with JEDEC MS-026 standards and is RoHS-compliant. Pin layout follows the DRG208 footprint, with symmetrical left/right port grouping and dedicated power/ground distribution.

How does the address counter function in the 70V3569S4BF8, and when is it useful?

The 70V3569S4BF8 includes an internal 14-bit address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising clock edge, the counter advances automatically-eliminating the need to drive full 14-bit addresses for sequential accesses. This reduces bus width and controller complexity in applications like packet streaming, FIFO emulation, or DMA-based data transfer.

What is the significance of the "S4" suffix in the 70V3569S4BF8 part number?

Within the IDT70V3569 family, the "S4" suffix denotes the commercial-grade speed bin with a maximum clock-to-data access time (tCD2) of 4.2 ns and a minimum clock cycle time (tCYC2) of 7.5 ns. It is rated for operation from 0°C to +70°C and is distinct from the S5 (5 ns / 10 ns) and S6 (6 ns / 12 ns) variants, which offer slower timing but broader temperature support or lower power.