Renesas 70V3599S133BFI8

Overview

70V3599S133BFI8 from IDT (now Renesas) is a high-speed 128K × 36-bit synchronous dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 133MHz (7.5ns cycle time), supports selectable pipelined or flow-through output modes, and features dual 3.3V/2.5V I/O voltage capability per port - used in high-bandwidth packet buffering, telecommunications line cards, and FPGA co-processor memory interfaces.

For engineers reviewing the 70V3599S133BFI8 datasheet, 70V3599S133BFI8 pinout, 70V3599S133BFI8 application, or 70V3599S133BFI8 equivalent, key selection criteria include guaranteed 133MHz operation across industrial temperature (−40°C to +85°C), JTAG IEEE 1149.1 compliance, dual chip enable for depth expansion, and independent VDDQ/OPT control per port for mixed-voltage system integration.

Technical Context

This device implements fully synchronous dual-port SRAM architecture with separate clock, address, data, and control registers on each port - eliminating asynchronous timing hazards and enabling deterministic 133MHz burst transfers. Its internal counter logic supports address auto-increment and repeat functions via ADS, CNTEN, and REPEAT signals, reducing external address generation overhead.

The dual-port core uses true dual-port memory cells with independent write-enable (R/W), chip-enable (CE0/CE1), and byte-enable (BE0–BE3) per port. Pipelined mode delivers 4.2ns clock-to-data-out (tCD2), while flow-through mode provides lower latency at reduced maximum frequency - both modes support full 36-bit parallel I/O with per-byte bus matching.

Key Specifications

Pinout & Package

70V3599S133BFI8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8mm ball pitch and 15mm × 15mm body size. Pin assignments are symmetrically organized for left (L) and right (R) ports, with dedicated power (VDD, VDDQL, VDDQR), ground (VSS), and dual-function control (e.g., PL/FTL, ADSL, CNTENL) terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C33128A-133BIN, the 70V3599S133BFI8 uniquely combines 36-bit width, industrial temperature, per-port I/O voltage selection, and JTAG - making it the only option for mixed-voltage, safety-critical, or debug-intensive dual-port memory systems.

Availability

70V3599S133BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data acquisition requiring stable component supply across extended lifecycle and temperature ranges.

Supply support for 70V3599S133BFI8 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) is a global semiconductor leader specializing in high-performance memory, timing, and analog solutions for communications, computing, and industrial markets.

The 70V3599S133BFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors, FPGAs, and ASICs in bandwidth-constrained real-time systems.

FAQ

What is the maximum guaranteed operating frequency of the 70V3599S133BFI8 across its full temperature range?

The 70V3599S133BFI8 is rated for 133MHz operation (7.5ns clock cycle time) over the full industrial temperature range of −40°C to +85°C. This specification is validated and guaranteed per the manufacturer's datasheet - unlike the 166MHz variant (70V3599S166), which is commercial-grade only (0°C to +70°C). The 70V3599S133BFI8 maintains tCD2 ≤ 4.2ns and tCYC2 ≤ 7.5ns under worst-case conditions.

How does the 70V3599S133BFI8 support mixed-voltage system design?

The 70V3599S133BFI8 supports mixed-voltage design through independent OPTL and OPTR pins, each controlling the I/O voltage level (3.3V or 2.5V) for its respective port. When OPTL = VIH (3.3V), VDDQL must be 3.3V; when OPTL = VIL (0V), VDDQL must be 2.5V - and likewise for the right port. This allows one port to interface with a 3.3V FPGA bank while the other connects to a 2.5V ASIC, without external level shifters.

Does the 70V3599S133BFI8 support JTAG boundary-scan, and what pins are required?

Yes, the 70V3599S133BFI8 fully supports 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 are dedicated pins in the fpBGA package (e.g., TCK = P16, TMS = P3, TDI = B4, TDO = A4, TRST = P5) and operate at the VDDQ voltage of the left port.

What is the function of the REPEAT signal in the 70V3599S133BFI8, and how is it initialized?

The REPEAT signal in the 70V3599S133BFI8 resets the internal address counter to the last valid address loaded via ADS (Address Strobe Enable). It is not pre-initialized at power-up - the first ADS assertion must load a known starting address. Subsequent ADS events update the REPEAT address. This enables efficient circular buffer or burst-read patterns without host software intervention.

Can the 70V3599S133BFI8 be used in depth-expanded configurations, and what signals enable this?

Yes, the 70V3599S133BFI8 supports depth expansion using its dual chip enables (CE0L/CE1L and CE0R/CE1R). By tying CE0 of one device to CE1 of the next and cascading ADS/CNTEN/REPEAT, multiple devices can share address and control lines while occupying contiguous memory space - eliminating need for external decode logic. The datasheet confirms this capability with timing waveforms for multi-device pipelined reads.