Renesas 70V3589S133BFI

Overview

70V3589S133BFI from IDT (Integrated Device Technology) is a high-speed 128K x 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, features dual chip enables for depth expansion, and delivers 12Gbps aggregate bandwidth. It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3589S133BFI datasheet, 70V3589S133BFI pinout, 70V3589S133BFI application, or 70V3589S133BFI equivalent, key selection criteria include its 133MHz industrial-grade timing, independent 2.5V/3.3V I/O voltage support per port via OPT pins, JTAG IEEE 1149.1 compliance, and 208-pin fpBGA package compatibility with board-level signal integrity requirements.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports-enabling 1.7ns setup and 0.5ns hold times at 166MHz. Its internal architecture includes separate byte-enable logic per 9-bit data segment, counter-enabled auto-increment addressing with repeat functionality, and Dual Cycle Deselect (DCD) for pipelined mode stability.

The memory core uses true dual-port SRAM cells, not pseudo-dual-port or FIFO-based structures, allowing concurrent read and write operations without arbitration logic. Each port has independent clock (CLKL/CLKR), chip enables (CE0L/CE1L and CE0R/CE1R), and output enable (OEL/OER), supporting asymmetric access patterns common in network processor interconnects.

Key Specifications

Pinout & Package

70V3589S133BFI 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 power/ground balls per I/O bank for signal integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C33128P33A-133BIN, the 70V3589S133BFI uniquely combines per-port 2.5V/3.3V I/O selection, integrated JTAG, and hardware counter/repeat addressing-making it the only option supporting zero-software-overhead circular buffers and mixed-voltage SoC interfacing in a single device.

Availability

70V3589S133BFI is available at Aetrix Electronics and suitable for telecom infrastructure, network processor design, radar signal processing, and industrial motion control applications requiring stable component supply across extended product lifecycles.

Supply support for 70V3589S133BFI 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. It pioneered high-performance dual-port SRAM architectures for communications infrastructure.

The 70V3589S133BFI belongs to IDT's 70V35xx family of synchronous dual-port SRAMs, designed specifically for deterministic, low-latency inter-processor communication in carrier-class networking and real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V3589S133BFI in industrial temperature range?

The 70V3589S133BFI is rated for 133MHz operation (7.5ns cycle time) across the full industrial temperature range of −40°C to +85°C. This is verified in the AC Electrical Characteristics table (Table 11) under the 70V3599/89S133 column, with tCYC2 ≤ 7.5ns guaranteed. The device does not support 166MHz operation in industrial grade-only commercial grade variants do.

Does the 70V3589S133BFI support independent I/O voltage selection on left and right ports?

Yes, the 70V3589S133BFI supports independent I/O voltage selection via OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures VDDQL for 3.3V operation, while setting it to VIL (0V) configures VDDQL for 2.5V. The same applies to OPTR and VDDQR. Both ports may operate at 3.3V, both at 2.5V, or one at each voltage-enabling mixed-voltage system integration without external level shifters.

What is the function of the REPEAT pin on the 70V3589S133BFI?

The REPEAT pin (REPEATL/REPEATR) resets the internal address counter to the last valid address loaded via ADS (Address Strobe Enable) on the corresponding port. When asserted (VIH), it enables circular buffer behavior-critical for DMA-driven streaming applications like radar sampling or packet buffering. The REPEAT address is not preset at power-up; it must be initialized via an ADS access during system startup.

Which package type is used by the 70V3589S133BFI, and what are its mechanical dimensions?

70V3589S133BFI uses a 208-pin fine-pitch Ball Grid Array (fpBGA) package with 0.8mm ball pitch and a 15mm × 15mm body size (1.4mm height). This matches the BF208/BCG208 package code referenced in the datasheet. The fpBGA offers superior thermal and electrical performance over PQFP for high-speed 133MHz operation, with dedicated power/ground balls per I/O bank.

Does the 70V3589S133BFI include JTAG boundary-scan capability, and which signals are supported?

Yes, the 70V3589S133BFI fully supports IEEE 1149.1 JTAG boundary-scan with dedicated pins: TCK (10MHz max), TMS, TDI, TDO, and TRST. These signals are assigned to fixed balls in the fpBGA layout (e.g., TDI = B4, TDO = B3) and enable production-level interconnect testing without physical probe access-essential for reliability validation in telecom and aerospace applications.