Renesas 70V3569S4DR

Overview

70V3569S4DR 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 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 70V3569S4DR datasheet, 70V3569S4DR pinout, 70V3569S4DR application, or 70V3569S4DR equivalent, this device is selected for high-bandwidth bidirectional data buffering in telecom line cards, real-time DSP co-processing systems, and FPGA-based protocol bridging where deterministic latency, depth expansion capability, and low-power standby modes are critical.

Technical Context

The 70V3569S4DR implements fully synchronous dual-port operation on both left and right ports, with all inputs-including address, data, byte enables, R/W, CE, and ADS-registered on the rising edge of their respective clocks (CLKL/CLKR). Its pipelined output mode introduces one-cycle latency for data output, enabling stable 133 MHz operation with 1.8 ns setup and 0.7 ns hold times on all control and data inputs.

It features independent address counters per port with CNTEN/CNTRST controls, separate 9-bit byte enables (BE0–BE3) per port for granular 36-bit bus management, and dual chip enable logic (CE0/CE1) supporting seamless depth expansion without external logic. Core power is fixed at 3.3 V (±150 mV), while I/O voltage per port is selectable between 3.3 V and 2.5 V via dedicated OPTL/OPTR pins and corresponding VDDQL/VDDQR supplies.

Key Specifications

Pinout & Package

70V3569S4DR 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. Pin functions are symmetrically organized for left (L) and right (R) ports, with dedicated power (VDD, VDDQL, VDDQR), ground (VSS), and dual-option I/O supply selection (OPTL, OPTR).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166BAXI and AS7C3316PFS-15JIN, the 70V3569S4DR uniquely combines industrial temperature support, per-port I/O voltage selection, pipelined latency control, and integrated address counters-making it the only option among the three qualified for mixed-voltage, real-time embedded systems requiring deterministic timing and extended environmental operation.

Availability

70V3569S4DR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and FPGA-based protocol bridging applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V3569S4DR 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 sensor solutions for communications, computing, and industrial markets.

The 70V3569S4DR belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data buffering in real-time embedded systems where concurrent access, voltage flexibility, and industrial reliability are mandatory.

FAQ

What is the maximum operating frequency of the 70V3569S4DR?

The 70V3569S4DR supports up to 133 MHz operation, achieved with a minimum clock cycle time of 7.5 ns in pipelined mode. This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both left and right ports independently when operated within specified voltage and timing conditions.

Does the 70V3569S4DR support mixed I/O voltages between its two ports?

Yes, the 70V3569S4DR supports independent I/O voltage selection per port: OPTL configures the left port for either 3.3 V or 2.5 V operation, and OPTR does the same for the right port. This allows one port to interface with a 3.3 V FPGA while the other connects directly to a 2.5 V ASIC-eliminating external level shifters.

How does the address counter function work on the 70V3569S4DR?

The 70V3569S4DR provides independent address counters on each port, controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL, the internal address advances automatically on each rising clock edge-enabling FIFO-like sequential access without host CPU address updates. ADS remains functional for overriding with external addresses.

What is the purpose of the dual chip enable (CE0/CE1) logic in the 70V3569S4DR?

The dual CE logic (CE0 and CE1) enables depth expansion: asserting CE0 = VIL and CE1 = VIH activates the port; asserting both CE0 and CE1 = VIH places the port in power-down mode; asserting CE0 = VIH and CE1 = VIL also disables the port. This eliminates need for external decoding logic when stacking multiple 70V3569S4DR devices for larger memory capacity.

Is the 70V3569S4DR pin-compatible with other members of the 70V3569 family?

No-the 70V3569S4DR is a specific speed grade (4.2 ns tCD2, commercial-only) in a 208-pin PQFP package. It is not pin-compatible with the 70V3569S5 (5 ns, industrial) or 70V3569S6 (6 ns, commercial), nor with BGA variants (e.g., 208-ball fpBGA or 256-pin BGA), which have different pinouts and package footprints despite identical functionality.