Renesas 70V3599S166DRG

Overview

70V3599S166DRG from IDT (now Renesas) is a high-speed 128K × 36-bit synchronous dual-port SRAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 166MHz (6ns cycle time), delivers 12Gbps aggregate bandwidth, supports selectable pipelined or flow-through output modes, and features dual chip enables for seamless depth expansion in telecom packet buffers.

For engineers reviewing the 70V3599S166DRG datasheet, 70V3599S166DRG pinout, 70V3599S166DRG application, or 70V3599S166DRG equivalent, key selection criteria include guaranteed 3.6ns clock-to-data-out timing at 166MHz, independent 3.3V/2.5V I/O voltage selection per port via OPT pins, JTAG IEEE 1149.1 compliance, and industrial-grade operation up to +85°C with 133MHz support.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports-enabling minimal 1.7ns setup and 0.5ns hold times at 166MHz. Its self-timed write architecture eliminates external wait-state logic, while dual-cycle deselect (DCD) in pipelined mode ensures deterministic bus release timing during rapid port switching.

The memory integrates independent address counters with CNTEN/REPEAT controls per port, supporting burst-mode sequential addressing without external sequencers. Each port's I/O voltage (3.3V or 2.5V) is set independently via dedicated OPTL/OPTR pins, decoupling core VDD (3.3V only) from interface-level signaling requirements.

Key Specifications

Pinout & Package

70V3599S166DRG is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.65mm lead pitch and 28mm × 28mm body size. Pin functions are strictly segregated by port (Left/Right), with dedicated clocks (CLKL/CLKR), chip enables (CE0L/CE1L, CE0R/CE1R), byte enables (BE0–BE3 per port), and independent I/O banks (I/O0L–I/O35L, I/O0R–I/O35R).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and AS7C3256B-166JIN, the 70V3599S166DRG uniquely combines 166MHz synchronous operation, per-port I/O voltage flexibility, and integrated address sequencing-reducing BOM count and PCB area in high-performance communications hardware.

Availability

70V3599S166DRG is available at Aetrix Electronics and suitable for telecom infrastructure, network processor design, and real-time video processing applications requiring stable component supply and long-term obsolescence management.

Supply support for 70V3599S166DRG 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a semiconductor company specializing in high-performance timing, memory, and interface solutions for communications and computing markets.

The 70V3599S166DRG belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for low-latency, high-bandwidth buffering in packet-switched networks and real-time signal processing systems.

FAQ

What is the maximum guaranteed operating frequency for the 70V3599S166DRG?

The 70V3599S166DRG is rated for guaranteed operation at 166MHz (6ns clock cycle time) in commercial temperature range (0°C to +70°C). This is validated by its 3.6ns maximum clock-to-data-out timing in pipelined mode and 1.7ns minimum setup time for all inputs, ensuring deterministic timing closure in high-speed designs without derating.

Does the 70V3599S166DRG support both 2.5V and 3.3V I/O interfaces simultaneously?

Yes, the 70V3599S166DRG supports independent I/O voltage selection per port: OPTL configures the left port's VDDQL rail (3.3V or 2.5V), and OPTR configures the right port's VDDQR rail. This allows the left port to interface with a 2.5V FPGA while the right port connects to a 3.3V ASIC-eliminating external level shifters and reducing signal integrity complexity.

How does the REPEAT function work in the 70V3599S166DRG?

The REPEAT function in the 70V3599S166DRG resets the internal address counter to the last valid address loaded via ADSL or ADSR. When REPEATL or REPEATR is asserted (VIH), subsequent counter increments restart from that latched address-enabling circular buffer behavior without host CPU intervention. This is especially useful in streaming applications like packet FIFOs or video line buffers.

What package options are available for the 70V3599S166DRG?

The 70V3599S166DRG is offered in three package variants: 208-pin Plastic Quad Flatpack (PQFP), 208-pin fine-pitch Ball Grid Array (fpBGA), and 256-pin Ball Grid Array (BGA). The DRG suffix specifically denotes the 208-pin PQFP variant with 0.65mm lead pitch and 28mm × 28mm body size, optimized for thermal management and manual rework in prototyping environments.

Is JTAG boundary-scan supported on the 70V3599S166DRG?

Yes, the 70V3599S166DRG fully supports IEEE 1149.1 JTAG boundary-scan functionality via dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables in-system testing of solder joints and interconnects to the memory, verification of signal integrity on high-speed buses, and debugging of memory initialization sequences-critical for high-reliability telecom and aerospace applications.