Renesas 70T3589S166BC

Overview

70T3589S166BC from Integrated Device Technology is a high-speed 64K × 36-bit synchronous dual-port SRAM with true concurrent access on independent left and right ports, 2.5V core supply, selectable 2.5V/3.3V I/O interface per port, and industrial-grade operation up to 166MHz (3.6ns access). It supports pipelined or flow-through output modes, JTAG IEEE 1149.1 compliance, and collision/interrupt flag generation - deployed in real-time packet buffering for telecom line cards and FPGA co-processor memory interfaces.

For engineers reviewing the 70T3589S166BC datasheet, 70T3589S166BC pinout, 70T3589S166BC application, or 70T3589S166BC equivalent, this page delivers verified timing parameters, BGA package mapping, dual-port control logic behavior, sleep-mode power sequencing, and validated alternatives for memory subsystem design in industrial networking and embedded signal processing.

Technical Context

The 70T3589S166BC implements fully synchronous dual-port architecture with independent clock domains (CLKL/CLKR), register-controlled address/data/control inputs, and self-timed write enabling 5ns cycle time at 200MHz. Its dual chip enables (CE0/CE1 per port) support depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) signals enable burst-addressed sequential access.

Each port features independent OPT pins to configure VDDQX at either 2.5V or 3.3V, decoupling I/O voltage from the fixed 2.5V core supply. The device includes dedicated collision detection logic that asserts COLx flags when simultaneous writes target identical addresses, and interrupt flags (INTx) triggered by read/write completion or counter events - all synchronized to respective port clocks.

Key Specifications

Pinout & Package

70T3589S166BC is housed in a 256-pin Ball Grid Array (BC256) package with 17mm × 17mm footprint and 1.0mm ball pitch. All VDD pins require 2.5V; VDDQL/VDDQR must match OPTL/OPTR configuration (2.5V if OPT = VSS, 3.3V if OPT = VDD). NC pins include A16L, A17L, A16R, A17R per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and IDT70V9369S166BG, the 70T3589S166BC uniquely combines industrial-temp 166MHz performance with per-port I/O voltage selection, hardware collision detection, and JTAG testability - making it irreplaceable in mixed-voltage, safety-aware, or high-test-coverage designs.

Availability

70T3589S166BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3589S166BC 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications and computing markets.

The 70T35xxS family was designed specifically for high-bandwidth, low-latency dual-port memory applications in networking equipment, test instrumentation, and real-time embedded systems demanding concurrent access and deterministic timing.

FAQ

What is the maximum operating frequency and access time for the 70T3589S166BC?

The 70T3589S166BC is rated for 166MHz operation with a maximum access time of 3.6ns in pipelined output mode. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and applies to both left and right ports independently. The device also supports 133MHz operation with 4.2ns access time for lower-power implementations.

Does the 70T3589S166BC support mixed I/O voltages on its two ports?

Yes, the 70T3589S166BC supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VDD (2.5V) configures the left port for 3.3V I/O levels with VDDQL = 3.3V; setting OPTL = VSS (0V) configures it for 2.5V I/O with VDDQL = 2.5V. The right port operates identically using OPTR and VDDQR - enabling true mixed-voltage interfacing.

How does collision detection work on the 70T3589S166BC?

The 70T3589S166BC includes dedicated hardware collision detection logic that monitors simultaneous write operations to identical memory addresses across both ports. When detected, it asserts the COLL (left) or COLR (right) open-drain output flag within 3.6ns. These flags are asynchronous and require external pull-up resistors; they remain asserted until the next write cycle completes on the affected port.

What package options are available for the 70T3589S166BC?

The 70T3589S166BC is offered exclusively in the 256-pin Ball Grid Array (BC256) package with 17mm × 17mm body size and 1.0mm ball pitch. This differs from other variants in the 70T3519/99/89S family - for example, the 70T3589S166BD uses a 208-pin fpBGA (BF208), and the 70T3589S166DR uses a 208-pin PQFP (DR208). The BC256 package is optimized for high-density routing and thermal performance in telecom modules.

Can the 70T3589S166BC enter a low-power sleep mode, and how is it controlled?

Yes, the 70T3589S166BC supports hardware sleep mode via the ZZL and ZZR inputs. Asserting either pin to VIH disables dynamic inputs (except JTAG signals), reducing supply current to ≤20mA. Recovery requires three clock cycles after deassertion. During sleep, static inputs (PL/FTx, OPTx, and ZZx themselves) remain active, allowing wake-up triggering without external reset circuitry.