Renesas 70V3599S166BC

Overview

70V3599S166BC 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), supports selectable 3.3V or 2.5V I/O interfaces per port, and delivers 12Gbps aggregate bandwidth. It is used in high-throughput packet buffering, FPGA co-processor memory, and telecom line-card data path acceleration.

For engineers reviewing the 70V3599S166BC datasheet, 70V3599S166BC pinout, 70V3599S166BC application, or 70V3599S166BC equivalent, key selection criteria include pipelined vs. flow-through output timing, independent VDDQ voltage selection per port, JTAG IEEE 1149.1 compliance, industrial-grade temperature support up to +85°C, and depth-expansion capability using dual chip enables without external logic.

Technical Context

The 70V3599S166BC implements fully synchronous operation on both ports with registered address, data, and control inputs-enabling minimal setup/hold times (1.7ns setup, 0.5ns hold @ 166MHz). Its dual-port memory array allows concurrent access without arbitration logic, while the integrated address counter with repeat and enable features supports burst-mode sequential addressing.

Each port features independent power domains: 3.3V core (VDD) and selectable 3.3V/2.5V I/O (VDDQX controlled by OPTL/OPTR pins), supporting mixed-voltage system interfacing. The device supports JTAG boundary-scan testing and includes Dual Cycle Deselect (DCD) for reliable pipelined output mode deactivation.

Key Specifications

Pinout & Package

70V3599S166BC is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA, code BF208) with 0.8mm ball pitch and 15mm × 15mm body size. All VDD pins require 3.3V supply; VDDQL/VDDQR must match OPTL/OPTR logic levels (3.3V if VIH, 2.5V if 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 AS7C312836PFSI-166, the 70V3599S166BC uniquely supports per-port 2.5V/3.3V I/O selection and IEEE 1149.1 JTAG-critical for mixed-voltage FPGA-based systems requiring in-system testability and flexible voltage domain bridging.

Availability

70V3599S166BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, FPGA-accelerated computing, and real-time signal processing applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V3599S166BC 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 fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V3599S166BC belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for applications demanding concurrent, low-latency memory access between heterogeneous processors, FPGAs, or data-path subsystems.

FAQ

What is the maximum guaranteed operating frequency of the 70V3599S166BC?

The 70V3599S166BC is rated for 166MHz operation in commercial temperature range (0°C to +70°C) with 6ns clock cycle time in pipelined mode. At 133MHz, it is qualified for industrial temperature range (−40°C to +85°C). The 166MHz speed grade is not guaranteed under industrial conditions-designers requiring extended temperature support must use the 133MHz variant (70V3599S133BC).

How does the 70V3599S166BC handle mixed-voltage interfacing between its two ports?

The 70V3599S166BC supports independent I/O voltage selection per port via OPTL and OPTR pins: setting OPTL to VIH configures VDDQL for 3.3V operation, while VIL selects 2.5V; OPTR controls VDDQR identically. This allows the left port to interface with a 2.5V FPGA bank and the right port with a 3.3V microcontroller-without external level shifters-provided respective VDDQ supplies are correctly routed.

Does the 70V3599S166BC support JTAG boundary-scan, and what pins are required?

Yes, the 70V3599S166BC fully complies with IEEE 1149.1 JTAG boundary-scan. Required pins are TCK (Test Clock), TMS (Test Mode Select), TDI (Test Data In), TDO (Test Data Out), and TRST (Test Reset). These signals are dedicated and do not share functionality with memory I/O or control pins-enabling robust in-system testability without compromising memory operation.

What is the function of the REPEATL and REPEATR signals in the 70V3599S166BC?

REPEATL and REPEATR are asynchronous control inputs that reset the internal address counter to the last valid address loaded via ADSL or ADSR, respectively. When asserted, they cause the counter to repeat the most recently latched address-enabling efficient circular buffer or ping-pong memory access patterns without software intervention or external address generation logic.

Can the 70V3599S166BC be used in depth-expanded configurations, and how is this implemented?

Yes, the 70V3599S166BC supports depth expansion using its dual chip enables (CE0X and CE1X per port). By tying CE0 of one device to CE1 of the next and decoding higher-order address bits externally, designers can stack multiple devices to increase memory depth without adding glue logic. The datasheet confirms this capability is inherent to the device architecture and requires no special configuration.