Renesas 70V3589S133BFI8

Overview

70V3589S133BFI8 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 133MHz (7.5ns cycle time), supports selectable pipelined or flow-through output modes, and features dual chip enables for depth expansion - used in telecom line cards requiring deterministic low-latency inter-processor communication.

For engineers reviewing the 70V3589S133BFI8 datasheet, 70V3589S133BFI8 pinout, 70V3589S133BFI8 application, or 70V3589S133BFI8 equivalent, key selection criteria include its 133MHz industrial-grade timing (–40°C to +85°C), independent 2.5V/3.3V I/O voltage per port via OPT pins, JTAG IEEE 1149.1 compliance, and support for burst-mode unidirectional/bidirectional data flow in packet buffering systems.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, byte enable, and control inputs - delivering 1.7ns setup and 0.5ns hold times at 166MHz. Its self-timed write architecture enables fast cycle time without external wait-state logic.

The memory integrates dual address counters with CNTEN/REPEAT controls per port, allowing automatic sequential addressing and repeat-to-last-address functionality. Dual Cycle Deselect (DCD) ensures predictable deactivation in pipelined mode, while separate byte enables (BE0–BE3) support 9-bit byte granularity for multiplexed bus compatibility.

Key Specifications

Pinout & Package

70V3589S133BFI8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8mm ball pitch and 15mm × 15mm body size. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated clocks (CLKL/CLKR), chip enables (CE0L/CE1L, CE0R/CE1R), address (A0L–A16L, A0R–A16R), 36-bit bidirectional I/Os (I/O0L–I/O35L, I/O0R–I/O35R), and control signals including PL/FTL/PL/FTR, ADS, CNTEN, REPEAT, and BE0–BE3 per port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZI and AS7C312836B-133BIN, the 70V3589S133BFI8 uniquely combines industrial temperature rating, per-port 2.5V/3.3V I/O flexibility, JTAG testability, and hardware address counter repeat - making it optimal for upgradable telecom and defense platforms requiring long-term supply stability and field serviceability.

Availability

70V3589S133BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial control, and aerospace avionics applications requiring stable component supply, extended temperature operation, and long-lifecycle support.

Supply support for 70V3589S133BFI8 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 IDT70V3589 product line was designed specifically for deterministic, low-latency dual-ported memory applications in telecom switching fabrics, network processors, and real-time embedded systems demanding simultaneous multi-master access.

FAQ

What is the maximum guaranteed operating frequency of the 70V3589S133BFI8?

The 70V3589S133BFI8 is rated for guaranteed operation at 133MHz across the full industrial temperature range (–40°C to +85°C), with a maximum clock cycle time of 7.5ns. This specification applies to both pipelined and flow-through output modes and is validated under worst-case voltage (3.15V VDD) and temperature conditions.

Does the 70V3589S133BFI8 support mixed-voltage operation between its left and right ports?

Yes, the 70V3589S133BFI8 supports independent I/O voltage selection per port: OPTL configures the left port's VDDQL supply (3.3V or 2.5V), and OPTR configures the right port's VDDQR supply (3.3V or 2.5V). This allows one port to interface with a 2.5V FPGA while the other connects to a 3.3V microcontroller - without level-shifting components.

How does the REPEAT function operate in the 70V3589S133BFI8?

In the 70V3589S133BFI8, asserting REPEATL or REPEATR resets the internal address counter to the last valid address loaded via ADSL or ADSR, respectively. This occurs independently per port and is not initialized at power-up - a known address must be loaded via ADS during system initialization to establish the repeat target.

What package type is used for the 70V3589S133BFI8?

The 70V3589S133BFI8 is supplied in a 208-pin fine-pitch Ball Grid Array (fpBGA) package with 0.8mm ball pitch and a 15mm × 15mm body size. This fpBGA variant (package code BFI8) is distinct from the PQFP and 256-BGA options offered in the same family and is optimized for high-density, thermally demanding applications.

Is JTAG boundary-scan supported on the 70V3589S133BFI8?

Yes, the 70V3589S133BFI8 includes full IEEE 1149.1-compliant JTAG boundary-scan functionality with dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables in-system testing of solder joints, interconnects, and logic states - critical for high-reliability telecom and aerospace assemblies where physical probe access is limited.