Renesas 70V3589S166BC8

Overview

70V3589S166BC8 from IDT (Integrated Device Technology) 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 166MHz with 3.6ns clock-to-data-out (pipelined mode), supports selectable 3.3V or 2.5V I/O interfaces per port, and targets high-bandwidth inter-processor communication in telecom line cards.

For engineers reviewing the 70V3589S166BC8 datasheet, 70V3589S166BC8 pinout, 70V3589S166BC8 application, or 70V3589S166BC8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-chip-enable depth expansion capability, JTAG IEEE 1149.1 compliance, and independent VDDQ voltage selection per port for mixed-voltage system interfacing.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, and control inputs-enabling minimal setup/hold times (1.7ns setup, 0.5ns hold @ 166MHz). Its internal architecture includes dual address counters with repeat and enable features, separate byte enables for 9-bit-wide data lanes, and Dual Cycle Deselect (DCD) logic for pipelined output mode stability.

The memory core uses true dual-port SRAM cells with self-timed write cycles, while independent OPT pins configure each port's I/O voltage (3.3V or 2.5V) via dedicated VDDQ supplies. JTAG boundary-scan support is implemented per IEEE 1149.1, with TCK rated up to 10MHz.

Key Specifications

Pinout & Package

70V3589S166BC8 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, including dual 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 dedicated control signals (R/WL/R/WR, OEL/OER, ADSL/ADSR, CNTENL/CNTENR, REPEATL/REPEATR, 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 CY7C1362BV33-166AXC and AS7C33128A-166BIN, the 70V3589S166BC8 provides unique per-port I/O voltage selection, dual-mode output latency control, and integrated JTAG-making it optimal for mixed-voltage, high-reliability, and test-critical embedded systems.

Availability

70V3589S166BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, network processor subsystems, military radar signal processing, and industrial real-time control applications requiring stable component supply and long-term lifecycle management.

Supply support for 70V3589S166BC8 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 high-performance timing, memory, and interface solutions before its acquisition by Renesas Electronics in 2019. It pioneered synchronous dual-port SRAM architectures for demanding communications infrastructure.

The 70V3589S166BC8 belongs to IDT's 70V35xx family of high-speed synchronous dual-port SRAMs, designed specifically for low-latency, deterministic inter-processor communication in telecom, networking, and defense electronics where simultaneous dual-port access and precise timing control are essential.

FAQ

What is the maximum operating frequency of the 70V3589S166BC8?

The 70V3589S166BC8 supports a maximum clock frequency of 166MHz in commercial temperature range (0°C to +70°C), delivering a 6ns clock cycle time in pipelined output mode. At this speed, it achieves 12Gbps aggregate bandwidth across both ports. The industrial-grade variant (70V3589S133BC8) operates up to 133MHz over -40°C to +85°C.

Does the 70V3589S166BC8 support mixed-voltage I/O operation?

Yes, the 70V3589S166BC8 supports independent I/O voltage selection per port: OPTL and OPTR pins configure left and right ports to operate at either 3.3V (±150mV) or 2.5V (±100mV), with corresponding VDDQL and VDDQR supplies. This enables direct interfacing with heterogeneous logic families without external level shifters.

How does the pipelined versus flow-through output mode affect system timing in the 70V3589S166BC8?

In pipelined mode (PL/FT = VIH), the 70V3589S166BC8 introduces a 1-clock-cycle latency for read data (tCD2 = 3.6ns @ 166MHz), ensuring deterministic timing for pipeline-constrained systems. In flow-through mode (PL/FT = VIL), data appears on the bus within the same clock cycle (tCD1 = 12ns), reducing latency for tightly coupled read-after-write operations.

What is the function of the REPEAT and CNTEN signals in the 70V3589S166BC8?

The CNTEN signal enables the internal address counter on the associated port, advancing the address automatically on each clock edge. When REPEAT is asserted, the counter resets to the last valid address loaded via ADS, enabling efficient burst access to a fixed memory region-ideal for circular buffers or DMA descriptor tables without CPU intervention.

Is JTAG boundary-scan supported on the 70V3589S166BC8, and what are its capabilities?

Yes, the 70V3589S166BC8 implements full IEEE 1149.1 JTAG boundary-scan with TCK rated up to 10MHz. It supports standard test access port (TAP) operations including instruction register scan, data register scan, and boundary-scan testing of all I/O pins-enabling production test, interconnect verification, and in-system debug of PCB assemblies.