Renesas 70V3569S4BF

Overview

70V3569S4BF from Integrated Device Technology is a high-speed 16K × 36-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous read/write access to the same memory location, 4.2 ns clock-to-data access (max), and 133 MHz operation at 7.5 ns cycle time. It serves as a shared buffer in high-throughput inter-processor communication systems requiring deterministic latency and burst data flow.

For engineers reviewing the 70V3569S4BF datasheet, 70V3569S4BF pinout, 70V3569S4BF application, or 70V3569S4BF equivalent, this device is selected for synchronous, low-latency, bidirectional memory sharing between independent clock domains-especially where byte-selectable I/O voltage (2.5 V/3.3 V per port), counter-enabled address sequencing, and depth-expansible dual-chip-enable logic are required.

Technical Context

The 70V3569S4BF implements fully synchronous operation on both ports using edge-triggered registers for all address, data, and control inputs-including separate pipelined output registers that introduce one-cycle latency for deterministic timing. Its dual-chip-enable (CE0/CE1) architecture supports seamless depth expansion without external logic, while independent OPT pins configure each port's I/O voltage (2.5 V or 3.3 V) independently of the fixed 3.3 V core supply (VDD).

It features an integrated address counter with asynchronous reset (CNTRST) and enable (CNTEN), allowing automatic sequential addressing without external sequencers. The counter operates independently of CE state and advances on CLK rising edge when CNTEN = L, enabling efficient burst transfers in applications like FIFO emulation and DMA buffering.

Key Specifications

Pinout & Package

208-pin Plastic Quad Flatpack (PQFP) package with 28 mm × 28 mm body, 0.65 mm lead pitch, and standard gull-wing lead form factor. Pin 1 marked by corner notch; pin numbering follows counterclockwise sequence from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-port SRAM applications.

Compared with CY7C1362BV33-100AXC and AS7C331664B-133BIN, the 70V3569S4BF uniquely delivers per-port I/O voltage selection, hardware address counter, and dual-chip-enable depth expansion-all in a standard PQFP package-making it the only option supporting mixed-voltage, counter-driven, and scalable dual-port memory architectures without external logic.

Availability

70V3569S4BF is available at Aetrix Electronics and suitable for inter-processor communication buffers, DMA descriptor rings, and video line buffers requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production lots.

Supply support for 70V3569S4BF 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 interface solutions for communications, computing, and industrial markets.

The 70V3569S4BF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between independent clock domains in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V3569S4BF?

The 70V3569S4BF supports up to 133 MHz operation with a minimum clock cycle time of 7.5 ns. This is achieved under commercial temperature conditions (0°C to +70°C) with full synchronous timing compliance, including 1.8 ns address setup and 0.7 ns hold times at 133 MHz. The device maintains this performance with either 2.5 V or 3.3 V I/O voltage configurations per port.

Does the 70V3569S4BF support independent I/O voltage levels on each port?

Yes, the 70V3569S4BF supports independent I/O voltage selection via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3 V I/O operation (requiring VDDQL = 3.3 V), while OPTL = VIL configures it for 2.5 V (requiring VDDQL = 2.5 V). The right port is configured identically but independently using OPTR and VDDQR. The core supply (VDD) remains fixed at 3.3 V.

How does the address counter function in the 70V3569S4BF?

The 70V3569S4BF integrates a hardware address counter controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = L on the rising edge of CLK, the internal address increments automatically-bypassing the external address bus. CNTRST asynchronously resets the counter to zero. This enables burst-mode sequential access without CPU intervention, ideal for descriptor rings or FIFO emulation.

What package type is used for the 70V3569S4BF?

The 70V3569S4BF is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with a 28 mm × 28 mm body and 0.65 mm lead pitch. This package is RoHS-compliant, supports standard reflow soldering profiles, and provides mechanical robustness for industrial-grade board assembly-distinct from the BGA and fpBGA variants offered in the same family.

Can the 70V3569S4BF be used for depth expansion without external logic?

Yes, the 70V3569S4BF supports depth expansion using its dual chip enable architecture (CE0L/CE1L and CE0R/CE1R). By decoding address MSBs to drive CE0/CE1 pairs across multiple devices, designers can construct wider memory arrays (e.g., 32K × 36) without adding gates or CPLDs. Each port's CE0/CE1 pair provides active-L decode logic internally, eliminating external decoding complexity.