Renesas 70V3589S166BCG

Overview

70V3589S166BCG 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 166MHz (6ns cycle time), delivers 12Gbps aggregate bandwidth, supports selectable pipelined or flow-through output modes, and features dual chip enables for seamless depth expansion in telecom switching fabric and network packet buffer applications.

For engineers reviewing the 70V3589S166BCG datasheet, 70V3589S166BCG pinout, 70V3589S166BCG application, or 70V3589S166BCG equivalent, key selection criteria include its 166MHz pipelined timing (tCD2 = 3.6ns), independent 3.3V/2.5V I/O voltage selection per port via OPT pins, JTAG IEEE 1149.1 compliance, and industrial-grade thermal stability up to +85°C - all critical for deterministic latency in real-time packet processing systems.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports, enabling minimal setup/hold times (1.7ns setup, 0.5ns hold @ 166MHz). Its internal architecture includes dual independent address counters with repeat and enable features, separate byte-enable logic per 9-bit data group, and self-timed write cycles that maintain fast cycle performance without external timing constraints.

The memory supports JTAG boundary-scan testing and offers configurable I/O voltage domains: core VDD remains fixed at 3.3V ±150mV, while each port's VDDQ (and associated I/O/control signaling levels) is independently selectable between 3.3V (±150mV) and 2.5V (±100mV) via dedicated OPTL/OPTR pins - enabling interoperability with mixed-voltage SoC interfaces.

Key Specifications

Pinout & Package

70V3589S166BCG 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 clock, address, data I/O, control, and power/ground terminals per side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18-167BZC and IDT70V3599S166BG, the 70V3589S166BCG uniquely balances 128K×36 capacity, 166MHz pipelined performance, per-port voltage configurability, and compact 208-pin fpBGA packaging - making it optimal for space-constrained, mixed-voltage telecom line cards.

Availability

70V3589S166BCG is available at Aetrix Electronics and suitable for telecom switching fabric, network packet buffer, real-time signal processing, industrial motion control, and PLC backplane applications requiring stable component supply across multi-year production cycles.

Supply support for 70V3589S166BCG 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 Corporation (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and high-performance memory solutions for industrial, automotive, and communications markets.

The IDT70V35xx family was designed specifically for ultra-low-latency, high-bandwidth dual-access memory applications in telecom infrastructure, network processors, and real-time embedded systems demanding deterministic timing and mixed-voltage interoperability.

FAQ

What is the maximum operating frequency of the 70V3589S166BCG in pipelined mode?

The 70V3589S166BCG supports a maximum clock frequency of 166MHz in pipelined output mode, achieving a 6ns clock cycle time and 3.6ns maximum clock-to-data-out delay (tCD2). This specification applies under commercial temperature conditions (0°C to +70°C) with VDD = 3.3V ±150mV and appropriate VDDQ supply. The 70V3589S166BCG is not rated for 166MHz operation in industrial temperature range.

Does the 70V3589S166BCG support independent I/O voltage selection on left and right ports?

Yes, the 70V3589S166BCG supports independent I/O voltage selection per port via dedicated OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures the left port's VDDQL and I/O logic levels for 3.3V operation; setting it to VIL (0V) selects 2.5V. The same applies to OPTR for the right port. This allows mixed-voltage interfacing - for example, connecting the left port to a 3.3V ASIC and the right port to a 2.5V FPGA - without external level shifters.

What is the function of the REPEAT and CNTEN pins on the 70V3589S166BCG?

The CNTEN pin enables the internal address counter on each port, advancing the address on every rising clock edge when asserted low. The REPEAT pin resets the counter to the last valid address loaded via ADS (Address Strobe Enable), enabling automatic looping over a defined memory block. These features are used together in burst-access applications such as DMA transfers or waveform generation, where the 70V3589S166BCG autonomously sequences through consecutive addresses without CPU intervention.

Is the 70V3589S166BCG pin-compatible with other members of the IDT70V35xx family?

No, the 70V3589S166BCG is not universally pin-compatible across the IDT70V35xx family. While it shares the same 208-pin fpBGA footprint with the 70V3589S133BCG, it differs from the 256-pin BGA variant (e.g., IDT70V3599S166BG) in pin count, ball map, and power/ground distribution. Always verify mechanical and electrical compatibility using the specific package drawing and pinout table for the exact 70V3589S166BCG before PCB layout.

What JTAG capabilities does the 70V3589S166BCG provide?

The 70V3589S166BCG implements full IEEE 1149.1 JTAG boundary-scan functionality via dedicated TCK, TMS, TDI, TDO, and TRST pins. This enables in-system testing of solder joints and interconnects, visibility into internal register states during debug, and standardized programming/test access - critical for high-reliability telecom hardware validation and field diagnostics. The 70V3589S166BCG's JTAG implementation is functionally identical to that specified in the IDT70V3599/89 datasheet.