Renesas 70V3599S166BFG

Overview

70V3599S166BFG 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 targets high-throughput packet buffering in telecom line cards.

For engineers reviewing the 70V3599S166BFG datasheet, 70V3599S166BFG pinout, 70V3599S166BFG application, or 70V3599S166BFG equivalent, key selection criteria include its 166MHz pipelined timing (3.6ns tCD2), dual 3.3V/2.5V I/O voltage support per port via OPT pins, JTAG IEEE 1149.1 compliance, and industrial-grade thermal range capability at 133MHz.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, byte enable, and control inputs-enabling minimal setup/hold times (1.7ns tSA, 0.5ns tHA @ 166MHz). Its internal counter logic supports address auto-increment and repeat functions triggered by ADS and REPEAT signals, eliminating external address generation in burst-access applications.

The memory core uses true dual-port static cells with self-timed write control, while separate VDDQ supplies and OPT pins allow independent 3.3V or 2.5V I/O interface levels on each port. Dual chip enables (CE0/CE1 per port) support seamless depth expansion without external logic, and Dual Cycle Deselect (DCD) ensures clean pipelined output deactivation.

Key Specifications

Pinout & Package

208-pin fine-pitch Ball Grid Array (fpBGA), package code BFG208. Body size: 17mm × 17mm × 1.4mm, 1.0mm ball pitch. All VDD pins require 3.3V supply; VDDQ pins must match OPT pin logic level (3.3V if OPT = VIH, 2.5V if OPT = VIL).

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-166JCIN, the 70V3599S166BFG uniquely supports per-port 3.3V/2.5V I/O selection and IEEE 1149.1 JTAG, making it optimal for heterogeneous voltage systems and production-test-critical applications - while maintaining identical 166MHz performance and 128K×36 density.

Availability

70V3599S166BFG is available at Aetrix Electronics and suitable for telecom infrastructure, network switching, real-time signal processing, and FPGA co-processing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for 70V3599S166BFG 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

Renesas Electronics (formerly Integrated Device Technology, IDT) is a global semiconductor leader specializing in high-performance memory, timing, and connectivity solutions for communications, computing, and industrial markets.

The IDT70V3599 family was designed specifically for high-bandwidth, low-latency dual-port buffering in telecom line cards and packet-switching systems - emphasizing simultaneous access, flexible voltage interfaces, and robust testability.

FAQ

What is the maximum operating frequency of the 70V3599S166BFG in pipelined mode?

The 70V3599S166BFG supports up to 166MHz operation in pipelined mode, achieving a 6ns clock cycle time and 3.6ns maximum clock-to-data (tCD2) delay. This rating applies to the commercial temperature grade (0°C to +70°C); the industrial grade is rated for 133MHz (7.5ns cycle time) over –40°C to +85°C.

How does the 70V3599S166BFG support mixed-voltage system interfaces?

The 70V3599S166BFG supports independent 3.3V or 2.5V I/O voltage levels on each port via dedicated OPTL and OPTR pins. When OPTX is set to VIH (3.3V), the corresponding port's I/Os operate at 3.3V levels and require VDDQX = 3.3V; when OPTX = VIL (0V), the port operates at 2.5V levels with VDDQX = 2.5V - enabling direct interfacing with heterogeneous logic families without external level shifters.

Does the 70V3599S166BFG include built-in test features?

Yes, the 70V3599S166BFG integrates full IEEE 1149.1 JTAG boundary-scan functionality with TCK, TMS, TDI, TDO, and TRST pins. This enables in-system testability, interconnect verification, and programmable configuration - critical for high-reliability telecom and industrial applications requiring production test coverage and field diagnostics.

What memory organization does the 70V3599S166BFG implement, and how is address width determined?

The 70V3599S166BFG implements a 128K × 36-bit organization (4.608 Mbit total), requiring 17 address bits (A0–A16) per port. A16 is functional for 128K addressing; it is a no-connect only in the 64K variant (IDT70V3589). The device supports both 128K and 64K configurations via part number differentiation, not pin strapping.

Can the 70V3599S166BFG be used for circular buffer applications without external address logic?

Yes, the 70V3599S166BFG includes integrated address counter logic with CNTEN and REPEAT controls. When CNTEN is asserted, the internal counter auto-increments on each clock; REPEAT resets the counter to the last valid address loaded via ADS - enabling hardware-accelerated circular buffers, FIFOs, and burst transfers without external address generators or microcontroller intervention.