Renesas 70V3589S133DRG8

Overview

70V3589S133DRG8 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 with industrial temperature range (–40°C to +85°C). It is used in real-time packet buffering for telecom line cards and FPGA co-processor memory interfaces.

For engineers reviewing the 70V3589S133DRG8 datasheet, 70V3589S133DRG8 pinout, 70V3589S133DRG8 application, or 70V3589S133DRG8 equivalent, key selection criteria include guaranteed 133MHz operation under industrial conditions, dual-voltage I/O flexibility (3.3V/2.5V per port), JTAG IEEE 1149.1 compliance, pipelined/flow-through mode configurability, and support for depth expansion via dual chip enables without external logic.

Technical Context

This device implements fully synchronous dual-port SRAM architecture with independent clock, address, data, and control paths on left and right ports. Each port includes dedicated registers for address, data input, byte enables, and control signals-enabling 1.7ns setup and 0.5ns hold times at 166MHz (derated to 133MHz for industrial grade).

It supports two distinct output timing modes: pipelined (tCD2 = 4.2ns max, tCYC2 = 7.5ns min) and flow-through (tCD1 = 15ns max, tCYC1 = 25ns min), selected per port via PL/FTL and PL/FTR pins. Dual-cycle deselect (DCD) is active only in pipelined mode, and counter-based sequential addressing is enabled via CNTEN/REPEAT/ADSL signals.

Key Specifications

Pinout & Package

70V3589S133DRG8 is packaged in a 208-pin Plastic Quad Flatpack (PQFP) with 0.5mm lead pitch and 28mm × 28mm body size. Pin functions are symmetrically distributed between left (L) and right (R) ports, with dedicated clocks (CLKL/CLKR), chip enables (CE0L/CE1L, CE0R/CE1R), address buses (A0L–A16L, A0R–A16R), 36-bit bidirectional I/Os (I/O0L–I/O35L, I/O0R–I/O35R), and per-port OPT/PL-FT control pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZI and AS7C3256B-133JCIN, the 70V3589S133DRG8 uniquely delivers JTAG testability, per-port 2.5V/3.3V I/O flexibility, and hardware address counter with repeat - making it the only option qualified for industrial telecom and certified avionics memory subsystems.

Availability

70V3589S133DRG8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and aerospace data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3589S133DRG8 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 timing, memory, and connectivity solutions for communications, computing, and industrial markets.

The 70V3589S133DRG8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency shared memory in multi-processor and FPGA-accelerated systems demanding simultaneous access and industrial-grade reliability.

FAQ

What is the guaranteed maximum operating frequency of the 70V3589S133DRG8 under industrial temperature conditions?

The 70V3589S133DRG8 is rated for guaranteed operation at 133MHz (7.5ns minimum clock cycle time) across the full industrial temperature range of –40°C to +85°C. This specification is validated per AC Electrical Characteristics Table 11 in the official datasheet and applies to both pipelined and flow-through output modes when operated within recommended DC conditions.

Does the 70V3589S133DRG8 support independent I/O voltage levels on its left and right ports?

Yes, the 70V3589S133DRG8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures the left port for 3.3V I/O operation with VDDQL = 3.3V; setting it to VIL (0V) configures 2.5V operation with VDDQL = 2.5V. The same applies independently to the right port using OPTR and VDDQR.

How does the REPEAT function work in the 70V3589S133DRG8, and what is its practical use case?

The REPEAT signal resets the internal address counter to the last valid address loaded via ADSL or ADSR. When asserted (REPEATL = H), subsequent counter increments restart from that latched address. This enables circular buffer behavior - for example, streaming sensor data into a fixed-size ring buffer without software intervention, reducing CPU load in real-time control loops.

Is JTAG boundary-scan supported on the 70V3589S133DRG8, and which IEEE standard does it comply with?

Yes, the 70V3589S133DRG8 integrates full IEEE 1149.1-compliant JTAG boundary-scan functionality with dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables in-system testing of PCB interconnects, verification of memory bus integrity, and debug visibility in complex multi-chip modules - critical for DO-254 and IEC 61508-certified systems.

What packaging options are available for the 70V3589S133DRG8, and which one corresponds to the 'DRG8' suffix?

The 70V3589S133DRG8 uses the DRG208 package code, denoting a 208-pin Plastic Quad Flatpack (PQFP) with 28mm × 28mm body and 0.5mm lead pitch. Other variants include BF208 (208-pin fpBGA) and BC256 (256-pin BGA), but the 'DRG8' suffix explicitly identifies the PQFP variant - confirmed in Pin Configuration diagrams on pages 4–5 of the datasheet.