Renesas 70V3589S133BC

Overview

70V3589S133BC from IDT (Integrated Device Technology) is a high-speed 128K x 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 delivers 12Gbps aggregate bandwidth. It is used in real-time packet buffering for telecom line cards and FPGA co-processor interconnects.

For engineers reviewing the 70V3589S133BC datasheet, 70V3589S133BC pinout, 70V3589S133BC application, or 70V3589S133BC equivalent, key selection criteria include its 133MHz industrial-grade timing, dual-voltage I/O support (2.5V/3.3V per port), JTAG IEEE 1149.1 compliance, and depth-expansion capability via dual chip enables without external logic.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, byte enable, and control inputs-enabling 1.7ns setup and 0.5ns hold times at 133MHz. Its self-timed write architecture minimizes cycle time dependency on external timing margins.

The memory array uses true dual-port cells with independent clock domains (CLKL/CLKR), counter-based address generation (CNTEN/REPEAT), and Dual Cycle Deselect (DCD) for pipelined mode. Each port supports independent VDDQ selection (2.5V or 3.3V) via OPTL/OPTR pins, decoupling I/O voltage from the fixed 3.3V core supply (VDD).

Key Specifications

Pinout & Package

70V3589S133BC is available in a 208-pin fine-pitch Ball Grid Array (fpBGA) package with 0.8mm ball pitch and 15mm × 15mm body size. Pin functions are symmetric across left (L) and right (R) ports, with dedicated clock, address, data I/O, control, and power/ground 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 AS7C33128PFS-133BIN, the 70V3589S133BC uniquely combines per-port 2.5V/3.3V I/O selection, IEEE 1149.1 JTAG, and pipelined+flow-through dual-mode operation-making it optimal for heterogeneous, test-critical, low-latency embedded systems.

Availability

70V3589S133BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 70V3589S133BC 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 high-performance interconnect solutions before its acquisition by Renesas Electronics in 2019.

The IDT70V3589 product line delivers high-bandwidth, low-latency dual-port SRAMs designed for real-time embedded systems requiring deterministic memory access across asynchronous clock domains.

FAQ

What is the maximum operating frequency of the 70V3589S133BC and under what conditions is it guaranteed?

The 70V3589S133BC is rated for 133MHz operation (7.5ns cycle time) in pipelined output mode, guaranteed across the full industrial temperature range (–40°C to +85°C) and 3.3V ±150mV core supply. This specification is validated per AC Electrical Characteristics Table 11 in the official datasheet, with tCYC2 ≤ 7.5ns and tCD2 ≤ 4.2ns under defined load and voltage conditions.

Does the 70V3589S133BC support independent I/O voltage levels on its left and right ports?

Yes, the 70V3589S133BC supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3V I/O (requiring VDDQL = 3.3V), while OPTL = VIL configures it for 2.5V I/O (requiring VDDQL = 2.5V). The same applies independently to the right port using OPTR and VDDQR. This allows mixed-voltage system integration without level shifters.

How does the Dual Cycle Deselect (DCD) feature function in the 70V3589S133BC?

Dual Cycle Deselect (DCD) is active only in pipelined output mode (PL/FTX = VIH) and causes chip enable signals (CE0X/CE1X) and byte enables (BEX) to be double-buffered. This means a change in CE or BE takes two clock cycles to affect output state-preventing partial-word glitches during deselection. It ensures clean, metastability-free transitions when disabling port access in high-speed burst sequences.

What is the role of the REPEAT signal in the 70V3589S133BC address counter functionality?

The REPEAT signal resets the internal address counter to the last valid address loaded via ADSX (Address Strobe Enable). When REPEATX is asserted (VIH), the counter reuses that stored address on the next clock edge-enabling repeated access to a single location without reloading the address bus. This is essential for polling status registers or streaming fixed-location configuration data in real-time firmware.

Is JTAG boundary-scan supported on the 70V3589S133BC, and which standards does it comply with?

Yes, the 70V3589S133BC integrates full IEEE 1149.1-compliant JTAG boundary-scan functionality with dedicated TCK, TMS, TDI, TDO, and TRST pins. It supports standard instruction register operations (SAMPLE/PRELOAD, EXTEST, INTEST) and is qualified for production test, board-level diagnostics, and in-system programming verification-meeting IPC-JEDEC J-STD-011 requirements for high-reliability electronics.