Renesas 70T3589S133BC

Overview

70T3589S133BC from Integrated Device Technology is a high-speed 256K × 36-bit synchronous dual-port SRAM with true dual-port architecture enabling simultaneous read/write access to the same memory location on independent left and right ports. It operates at 133MHz (7.5ns cycle time), supports selectable 2.5V or 3.3V I/O interfaces per port, and features pipelined or flow-through output modes - used in real-time packet buffering for telecom line cards and FPGA co-processor data exchange.

For engineers reviewing the 70T3589S133BC datasheet, 70T3589S133BC pinout, 70T3589S133BC application, or 70T3589S133BC equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), dual chip enables for depth expansion, JTAG-compliant IEEE 1149.1 testability, and low-latency 4.2ns clock-to-data (pipelined mode) timing.

Technical Context

This device implements fully synchronous operation on both ports with register-controlled inputs, enabling minimal setup/hold times (1.5ns setup, 0.5ns hold @ 200MHz). Its dual-port memory array uses dedicated address/data/control paths per port, with independent power domains for core (2.5V VDD) and I/Os (2.5V/3.3V VDDQ).

The architecture includes integrated address counters with repeat and enable controls, interrupt/collision detection logic for inter-port coordination, and dual-cycle deselect (DCD) for pipelined output mode. Sleep mode (via ZZL/ZZR) reduces dynamic current to ≤15mA while preserving JTAG accessibility.

Key Specifications

Pinout & Package

256-pin Ball Grid Array (BGA), 17mm × 17mm body, 1.0mm ball pitch. All VDD pins require 2.5V supply; VDDQ pins must match OPT pin configuration (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 CY7C1362BV33-133BZI and IDT70V9269L133PFGI, the 70T3589S133BC provides unique per-port I/O voltage configurability and integrated address counter logic - reducing external component count and enabling mixed-voltage system integration without level shifters or address generators.

Availability

70T3589S133BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3589S133BC 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, specializes in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 70T35xx family was designed for deterministic-latency, high-bandwidth shared-memory applications in networking, test equipment, and real-time embedded systems where concurrent port access and low-jitter timing are critical.

FAQ

What is the maximum operating frequency of the 70T3589S133BC?

The 70T3589S133BC is rated for 133MHz operation (7.5ns clock cycle time) across the industrial temperature range (–40°C to +85°C). This frequency is guaranteed for both pipelined and flow-through output modes, with corresponding tCD2 = 4.2ns (pipelined) and tCD1 = 15ns (flow-through) access times specified in the datasheet.

Does the 70T3589S133BC support JTAG boundary scan?

Yes, the 70T3589S133BC supports IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. JTAG functionality is available in the 256-pin BGA package (BC256/BCG256) but not supported in the 208-pin PQFP (DR208) variant due to pin count limitations.

How does the OPT pin configure I/O voltage levels on the 70T3589S133BC?

On the 70T3589S133BC, OPTL and OPTR pins independently select I/O voltage per port: when OPTX = VDD (2.5V), the corresponding port operates at 3.3V logic levels and requires VDDQX = 3.3V; when OPTX = VSS (0V), it operates at 2.5V levels with VDDQX = 2.5V. This enables mixed-voltage system integration without external level shifters.

What is the purpose of the REPEAT and CNTEN signals on the 70T3589S133BC?

The CNTENL/CNTENR signals enable the internal address counter on each port, advancing the address on every rising CLK edge. REPEATL/REPEATR resets the counter to the last valid address loaded via ADSL/ADSR - allowing automatic burst addressing without external counter logic, which simplifies FPGA or ASIC interface design.

Can the 70T3589S133BC operate with different supply voltages on left and right ports?

Yes, the 70T3589S133BC supports independent I/O voltage selection: OPTL configures the left port's VDDQL (2.5V or 3.3V), while OPTR configures the right port's VDDQR. The core VDD remains fixed at 2.5V. This allows the 70T3589S133BC to interface with 2.5V FPGAs on one port and 3.3V microcontrollers on the other without level translation circuitry.