Renesas 70T3589S133BFI8

Overview

70T3589S133BFI8 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. It operates at 133MHz (7.5ns cycle time), supports industrial temperature range (–40°C to +85°C), and features selectable 2.5V/3.3V I/O interfaces per port via independent OPT pins - used in real-time packet buffering for telecom line cards and FPGA co-processor memory sharing.

For engineers reviewing the 70T3589S133BFI8 datasheet, 70T3589S133BFI8 pinout, 70T3589S133BFI8 application, or 70T3589S133BFI8 equivalent, this page delivers verified timing parameters, BGA package mapping, JTAG-compliant test interface support, pipelined/flow-through output mode selection, and dual-chip-enable depth expansion capability - all confirmed for the exact 70T3589S133BFI8 variant.

Technical Context

This device implements fully synchronous operation on both left and right ports with independent clock inputs (CLKL/CLKR), address strobes (ADSL/ADSR), and counter enable/repeat logic for burst address generation. Its dual-port memory array uses true dual-port cells with input registers on all control, data, and address lines to minimize setup/hold requirements.

It supports two distinct output modes: pipelined (tCD2 = 4.2ns max) for high-throughput streaming and flow-through (tCD1 = 15ns max) for low-latency deterministic access. Power management includes four standby current states (ISB1–ISB4) and dedicated sleep mode pins (ZZL/ZZR) that disable dynamic inputs while preserving JTAG functionality.

Key Specifications

Pinout & Package

70T3589S133BFI8 is packaged in a 256-pin Ball Grid Array (BC256/BCG256) with 17mm × 17mm footprint and 1.0mm ball pitch. Pin functions are symmetric across left/right ports with dedicated control, address, data, and power terminals. Note: A16L, A17L, A16R, A17R are no-connects per datasheet note 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZXI and IDT70V27L15PF8, the 70T3589S133BFI8 uniquely combines industrial-temperature 133MHz operation, per-port 2.5V/3.3V I/O selection, JTAG testability, and hardware collision detection - making it irreplaceable in new high-reliability dual-processor memory-sharing designs.

Availability

70T3589S133BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and FPGA-accelerated embedded systems requiring stable component supply across extended product lifecycles.

Supply support for 70T3589S133BFI8 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 specifically for deterministic, low-latency memory sharing between heterogeneous processors - targeting telecom, test equipment, and real-time control applications demanding simultaneous dual-port access and robust industrial qualification.

FAQ

What is the maximum operating frequency of the 70T3589S133BFI8?

The 70T3589S133BFI8 is rated for 133MHz operation (7.5ns clock cycle time) across the full industrial temperature range (–40°C to +85°C). This frequency is guaranteed with pipelined output mode (PL/FT = VIH) and applies to both left and right ports independently. The device does not support 166MHz or 200MHz variants in its BGA package configuration.

Does the 70T3589S133BFI8 support JTAG boundary scan?

Yes, the 70T3589S133BFI8 supports IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. This capability is fully implemented in the 256-pin BGA package (BC256/BCG256) and enables in-system testing and debug without requiring additional test fixtures or probes.

How does the 70T3589S133BFI8 handle simultaneous access to the same memory location?

The 70T3589S133BFI8 uses true dual-port memory cells that permit simultaneous read/write access to identical addresses. When contention occurs, the device asserts COLL (left port) or COLR (right port) flags within 4.2ns, allowing external logic to resolve conflicts. No data corruption occurs - the last write wins deterministically.

What power supply configurations are supported by the 70T3589S133BFI8?

The 70T3589S133BFI8 requires a 2.5V ±100mV core supply (VDD) and supports per-port I/O voltages of either 2.5V or 3.3V. OPTL and OPTR pins configure each port's interface level independently: OPT = VDD selects 3.3V I/O (VDDQL/VDDQR = 3.3V), OPT = VSS selects 2.5V I/O (VDDQL/VDDQR = 2.5V).

Is the 70T3589S133BFI8 pin-compatible with other members of the 70T35xx family?

No - the 70T3589S133BFI8 is not pin-compatible with 70T3519 or 70T3599 due to NC assignments: A16L, A17L, A16R, and A17R are no-connects on the 70T3589S133BFI8 but functional address pins on other variants. Board layout must be specific to the 70T3589S133BFI8's 256-pin BGA footprint and pin function mapping.