Renesas 70T3589S166BF

Overview

70T3589S166BF from Integrated Device Technology is a high-speed 64K × 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 (3.6ns access), supports selectable 2.5V or 3.3V I/O interfaces per port, and features pipelined/flow-through output modes, JTAG IEEE 1149.1 compliance, and industrial temperature range (–40°C to +85°C) - deployed in real-time DSP co-processing and network packet buffering systems.

For engineers reviewing the 70T3589S166BF datasheet, 70T3589S166BF pinout, 70T3589S166BF application, or 70T3589S166BF equivalent, key selection criteria include dual-port timing coordination, VDDQ voltage configuration per port, sleep mode (ZZ) behavior, collision/interrupt flag latency, and fpBGA-208 package layout constraints for high-density PCB routing.

Technical Context

This device implements fully synchronous operation on both ports with register-controlled address, data, and control inputs-enabling minimal setup/hold times (1.5ns setup, 0.5ns hold @ 200MHz). Its dual-chip-enable architecture allows depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) functions support burst-addressed streaming applications.

The memory array uses true dual-port cells with self-timed write cycles, and supports independent power-down per port via CE0/CE1. The OPT pin configures each port's I/O voltage level (2.5V or 3.3V), requiring corresponding VDDQ supply alignment-no shared rail assumption between ports.

Key Specifications

Pinout & Package

208-pin fine-pitch Ball Grid Array (fpBGA), package code BF208/BFG208. Body size: 15mm × 15mm × 1.4mm, 0.8mm ball pitch. All VDD pins require 2.5V ±100mV; VDDQ pins must match OPT pin setting (3.3V if OPT = VDD, 2.5V if OPT = VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166BZXI and IDT70V27L15PF8, the 70T3589S166BF provides unique mixed-voltage I/O configurability, hardware collision detection, and industrial-grade 166MHz performance in fpBGA-making it the sole option for new designs requiring voltage-flexible, real-time synchronized dual-port memory.

Availability

70T3589S166BF is available at Aetrix Electronics and suitable for telecom infrastructure, radar signal processing, industrial PLC data exchange, and DSP co-processor interfacing requiring stable component supply across extended product lifecycles.

Supply support for 70T3589S166BF 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, computing, and industrial markets.

The 70T35xx family was designed specifically for high-bandwidth, low-latency dual-access memory applications in real-time systems-emphasizing simultaneous port operation, flexible voltage interfaces, and deterministic timing under industrial conditions.

FAQ

What is the maximum operating frequency of the 70T3589S166BF in industrial temperature range?

The 70T3589S166BF is rated for 166MHz operation across the full industrial temperature range (–40°C to +85°C), with guaranteed 3.6ns maximum access time in pipelined mode. This specification is validated per datasheet Table 12 and applies only to the BF208 fpBGA package; 200MHz operation is not supported in this package variant.

Does the 70T3589S166BF support independent I/O voltage levels on left and right ports?

Yes, the 70T3589S166BF supports independent I/O voltage selection per port using OPTL and OPTR pins. Setting OPTL = VDD (2.5V) configures the left port for 3.3V I/O operation with VDDQL = 3.3V; setting OPTR = VSS (0V) configures the right port for 2.5V I/O with VDDQR = 2.5V. This enables mixed-voltage system integration without external level shifters.

How does the sleep mode (ZZ) function on the 70T3589S166BF affect JTAG testability?

When ZZR or ZZL is asserted high, the 70T3589S166BF disables all dynamic inputs except JTAG signals (TCK, TMS, TDI, TDO, TRST). Boundary scan remains fully operational during sleep mode, allowing in-system test and debug without waking the memory core-critical for low-power diagnostic modes in field-deployed equipment.

What is the purpose of the REPEAT and CNTEN pins on the 70T3589S166BF?

The CNTEN pin enables the internal address counter on each port's rising clock edge, while REPEAT resets the counter to the last valid address loaded via ADS. Together, they support burst-mode sequential addressing-e.g., streaming ADC samples into contiguous memory locations without external address generation logic. This reduces FPGA resource usage in data acquisition systems using the 70T3589S166BF.

Are A16 and A17 address pins functional on the 70T3589S166BF?

No, A16L, A16R, A17L, and A17R are No Connect (NC) pins on the 70T3589S166BF, as confirmed in datasheet Note 2 on page 3 and Pin Names table footnote 6. The device implements only 16-bit addressing (A0–A15) for its 64K × 36 configuration, simplifying PCB layout and eliminating unused address traces.