Renesas 70T3589S133BCI8

Overview

70T3589S133BCI8 from Integrated Device Technology is a high-speed 256K × 36-bit synchronous dual-port SRAM with true dual-port architecture, 4.2 ns max clock-to-data access at 133 MHz, 2.5 V core supply, and independently configurable 2.5 V/3.3 V I/O interfaces per port. It enables simultaneous read/write access to the same memory location in telecom switching fabric and real-time DSP buffer applications.

For engineers reviewing the 70T3589S133BCI8 datasheet, 70T3589S133BCI8 pinout, 70T3589S133BCI8 application, or 70T3589S133BCI8 equivalent, this page delivers verified timing parameters, industrial-grade (-40°C to +85°C) operation at 133 MHz, BGA package mapping, JTAG-compliant test support, and validated alternatives for memory subsystem design.

Technical Context

This device implements fully synchronous dual-port operation with independent clock domains (CLKL/CLKR), pipelined or flow-through output modes controlled by PL/FTL and PL/FTR inputs, and on-chip address counters with ADS strobe, CNTEN enable, and REPEAT reload functionality. Each port supports byte-selectable writes via four 9-bit BE signals.

It integrates collision detection logic that asserts COLR/COLL flags when concurrent accesses target identical addresses, plus interrupt generation (INTR/INTL) for host CPU notification. Sleep mode (ZZL/ZZR) reduces dynamic current to ≤15 mA while preserving JTAG accessibility for in-system debug.

Key Specifications

Pinout & Package

70T3589S133BCI8 is housed in a 256-pin Ball Grid Array (BGA) package (BC256/BCG256), with 17 mm × 17 mm footprint and 1.0 mm ball pitch. All VDD pins require connection to 2.5 V; VDDQ pins must match OPT pin configuration (2.5 V if OPT = VSS, 3.3 V if OPT = VDD). A17L and A17R are no-connect (NC) for this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and IDT70V27L15PF8, the 70T3589S133BCI8 uniquely supports per-port 2.5 V/3.3 V I/O selection, pipelined output mode for 4.2 ns latency, and integrated JTAG-making it optimal for new high-speed, mixed-voltage, debug-capable embedded systems.

Availability

70T3589S133BCI8 is available at Aetrix Electronics and suitable for telecom switching fabric, industrial PLC I/O mapping, and radar signal processing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3589S133BCI8 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, designs high-performance timing, memory, and RF solutions for communications, computing, and industrial markets.

The 70T35xx family targets high-bandwidth, low-latency memory subsystems in telecom infrastructure and real-time embedded systems-emphasizing true dual-port concurrency, flexible voltage interfaces, and robust debug capabilities.

FAQ

What is the maximum operating frequency of the 70T3589S133BCI8 at industrial temperature?

The 70T3589S133BCI8 is rated for 133 MHz operation across the full industrial temperature range of -40°C to +85°C. This is confirmed in the AC Electrical Characteristics table (page 12), where S133 versions list guaranteed timing parameters under industrial conditions. The device achieves a 7.5 ns clock cycle time (tCYC2) in pipelined mode at this frequency, supporting deterministic real-time memory access.

Does the 70T3589S133BCI8 support independent voltage selection for each port's I/O interface?

Yes, the 70T3589S133BCI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VDD (2.5 V) configures the left port for 3.3 V I/O levels with VDDQL = 3.3 V; setting OPTL = VSS (0 V) configures it for 2.5 V I/O with VDDQL = 2.5 V. The same applies independently to the right port using OPTR and VDDQR. This enables mixed-voltage system integration without external level shifters.

What package type and pin count does the 70T3589S133BCI8 use?

The 70T3589S133BCI8 uses a 256-pin Ball Grid Array (BGA) package, specifically the BC256 or BCG256 variant. The package measures approximately 17 mm × 17 mm with a 1.0 mm ball pitch. Pin configuration documentation confirms A17L and A17R are no-connect (NC) for this variant, consistent with the IDT70T3589 family specification.

How does the collision detection feature work in the 70T3589S133BCI8?

The 70T3589S133BCI8 asserts COLL (left port) or COLR (right port) open-drain outputs when both ports attempt simultaneous access to the same memory address. Detection is asynchronous and occurs within 4.2 ns (tCOLS) of the conflicting access. These flags remain asserted until cleared by subsequent non-conflicting accesses, enabling host processors to implement error recovery or arbitration logic without polling memory contents.

Is JTAG boundary scan supported on the 70T3589S133BCI8, and what pins are required?

Yes, the 70T3589S133BCI8 supports IEEE 1149.1-compliant JTAG boundary scan in its BGA package. Required pins are TCK (Test Clock), TMS (Test Mode Select), TDI (Test Data In), TDO (Test Data Out), and TRST (Test Reset). JTAG is explicitly excluded from PQFP variants (DR208), but fully functional in BC256/BCG256 packages per the Pin Names table (page 6) and package notes.