Renesas 70T3599S133BFI8

Overview

70T3599S133BFI8 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 independent 2.5V core and selectable 2.5V/3.3V I/O supplies per port, and features pipelined or flow-through output modes for low-latency data transfer in real-time inter-processor communication systems.

For engineers reviewing the 70T3599S133BFI8 datasheet, 70T3599S133BFI8 pinout, 70T3599S133BFI8 application, or 70T3599S133BFI8 equivalent, this device is critical for deterministic latency buffering in FPGA-to-FPGA bridging, telecom packet header processing, and industrial motion controller co-processing where concurrent port access and sub-5ns clock-to-data timing are required.

Technical Context

The 70T3599S133BFI8 implements fully synchronous dual-port operation with register-controlled address, data, and control inputs on both left and right ports-enabling minimal setup/hold times (1.5ns/0.5ns) at 133MHz. Its internal architecture includes independent address counters with repeat and enable functions, JTAG-compliant IEEE 1149.1 test logic, and collision/interrupt detection circuitry for arbitration-aware systems.

Each port supports independent voltage selection via OPTL/OPTR pins: setting OPTX to VDD (2.5V) configures that port for 3.3V I/O levels (VDDQX = 3.3V), while OPTX = VSS enables 2.5V I/O operation (VDDQX = 2.5V). The device enters ultra-low-power sleep mode (I_ZZ ≤ 20mA) when ZZX pins are asserted, disabling dynamic inputs except JTAG.

Key Specifications

Pinout & Package

70T3599S133BFI8 is housed in a 256-pin Ball Grid Array (BGA) package (BC256/BCG256), with 17mm × 17mm footprint and 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). A17L and A17R are no-connect (NC) pins per datasheet note 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C3256A-133BIN, the 70T3599S133BFI8 uniquely delivers 2.5V core efficiency, per-port I/O voltage flexibility, and hardware collision/interrupt signaling-making it irreplaceable in mixed-voltage, latency-critical dual-access systems.

Availability

70T3599S133BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and defense electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70T3599S133BFI8 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, and RF power solutions for high-performance computing and communications.

The 70T35xx family was designed specifically for deterministic, low-latency inter-processor communication in systems demanding true dual-port SRAM with independent port control, JTAG testability, and industrial-grade reliability.

FAQ

What is the maximum operating frequency of the 70T3599S133BFI8?

The 70T3599S133BFI8 is rated for 133MHz operation (7.5ns cycle time) across the full industrial temperature range (−40°C to +85°C). This frequency is guaranteed with pipelined output mode (PL/FTX = VIH) and meets all AC timing parameters in Table 11 of the DSC 5666/14 datasheet. Higher speeds (166MHz/200MHz) are not supported for this specific speed grade.

Does the 70T3599S133BFI8 support independent voltage selection for each port?

Yes, the 70T3599S133BFI8 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 (requiring VDDQL = 3.3V), while OPTL = VSS (0V) configures it for 2.5V I/O (requiring VDDQL = 2.5V). The right port operates identically using OPTR and VDDQR.

What is the function of the REPEATL and REPEATR pins on the 70T3599S133BFI8?

REPEATL and REPEATR are asynchronous inputs that reset the internal address counter to the last valid address loaded via ADSL or ADSR, respectively. When asserted (VIH), they cause the counter to reuse the most recently latched address-enabling efficient burst-mode sequential access without external address increment logic.

How does collision detection work on the 70T3599S133BFI8?

The 70T3599S133BFI8 detects write collisions when both ports attempt to write to the same memory location simultaneously. The COLL and COLR outputs assert asynchronously to signal collision events on the left and right ports, respectively. Timing is guaranteed with tCOLS ≤ 4.2ns (max) and tCOLR ≤ 4.2ns (max) per the AC specifications table.

Is JTAG boundary scan supported on the 70T3599S133BFI8?

Yes, the 70T3599S133BFI8 implements full IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. This capability is available in the 256-pin BGA package (BC256/BCG256) but explicitly excluded in the 208-pin PQFP (DR208) variant per datasheet note 9.