Renesas 70V3589S166BFG8

Overview

70V3589S166BFG8 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 with 3.6ns clock-to-data-out (pipelined mode), supports selectable 3.3V or 2.5V I/O interfaces per port, and delivers 12Gbps aggregate bandwidth. It is used in telecom line cards for real-time packet buffering between ingress/egress data paths.

For engineers reviewing the 70V3589S166BFG8 datasheet, 70V3589S166BFG8 pinout, 70V3589S166BFG8 application, or 70V3589S166BFG8 equivalent, key selection criteria include pipelined vs. flow-through output timing, independent VDDQ voltage selection per port, dual chip enable depth expansion capability, JTAG IEEE 1149.1 compliance, and industrial-grade thermal stability up to +85°C.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, byte enable, and control inputs-enabling minimal 1.7ns setup and 0.5ns hold times at 166MHz. Its dual-port memory array uses dedicated input registers and self-timed write logic to achieve 6ns cycle time in pipelined mode.

The architecture supports independent configuration of each port's interface voltage (3.3V or 2.5V) via OPTL/OPTR pins and includes counter-enabled sequential addressing with repeat functionality triggered by ADS/REPEAT signals-critical for burst-mode FIFO emulation in network processors.

Key Specifications

Pinout & Package

70V3589S166BFG8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8 mm ball pitch and 15 mm × 15 mm body size. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated clocks, chip enables, address strobes, byte enables, and bidirectional I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and AS7C3128A-166BIN, the 70V3589S166BFG8 uniquely supports independent 2.5 V/3.3 V I/O per port, JTAG testability, and counter-based burst addressing-making it optimal for high-integration telecom and defense systems demanding mixed-voltage interoperability and production test coverage.

Availability

70V3589S166BFG8 is available at Aetrix Electronics and suitable for telecom infrastructure, network processor design, high-speed test equipment, and radar signal processing applications requiring stable component supply and long-term lifecycle assurance.

Supply support for 70V3589S166BFG8 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 timing, memory, and connectivity solutions for communications, computing, and industrial markets.

The IDT70V3589 product line was designed specifically for ultra-low-latency, high-bandwidth dual-port memory applications in telecom switching fabrics, network processors, and real-time signal processing systems.

FAQ

What is the maximum operating frequency of the 70V3589S166BFG8?

The 70V3589S166BFG8 is rated for 166 MHz operation in commercial temperature range (0°C to +70°C). This corresponds to a 6 ns clock cycle time in pipelined output mode. Industrial temperature range (-40°C to +85°C) is supported only at 133 MHz per the official datasheet specifications.

Does the 70V3589S166BFG8 support mixed-voltage operation between its two ports?

Yes, the 70V3589S166BFG8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Each port can be configured for either 3.3 V (±150 mV) or 2.5 V (±100 mV) operation-enabling direct interfacing with heterogeneous logic families such as 2.5 V FPGAs and 3.3 V ASICs simultaneously.

How does the pipelined versus flow-through output mode affect timing in the 70V3589S166BFG8?

In pipelined mode (PL/FTX = VIH), the 70V3589S166BFG8 achieves 3.6 ns clock-to-data-out (tCD2) at 166 MHz but adds one-cycle latency. In flow-through mode (PL/FTX = VIL), output appears combinatorially with 12 ns tCD1-suitable for applications requiring deterministic zero-cycle delay, albeit at reduced maximum frequency.

What is the purpose of the ADS and REPEAT signals in the 70V3589S166BFG8?

The ADS (Address Strobe) signal latches the current address into the internal counter, while REPEAT resets the counter to that latched address on the next clock edge. Together, they enable burst-mode sequential access-critical for descriptor queue management in network processors and radar processing pipelines using the 70V3589S166BFG8.

Is JTAG boundary-scan supported on the 70V3589S166BFG8?

Yes, the 70V3589S166BFG8 fully complies with IEEE 1149.1 and includes dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables comprehensive boundary-scan testing for PCB assembly validation and in-system diagnostics-particularly valuable in high-density fpBGA designs where probe access is limited.