Renesas 70T3599S133DR

Overview

70T3599S133DR 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 (4.2ns access), 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 burst data transfer in telecom switching fabric.

For engineers reviewing the 70T3599S133DR datasheet, 70T3599S133DR pinout, 70T3599S133DR application, or 70T3599S133DR equivalent, this device is selected for deterministic latency-critical dual-processor interconnects, packet buffer management in network processors, and real-time DSP co-processing where concurrent port arbitration and sub-5ns clock-to-data timing are required.

Technical Context

The 70T3599S133DR implements fully synchronous operation on both left and right ports with register-controlled address, data, and control inputs-enabling 5ns cycle time at 200MHz (though rated at 133MHz for industrial grade). Its dual chip enables (CE0/CE1) support depth expansion without external logic, while counter enable (CNTEN) and repeat (REPEAT) functions provide hardware-accelerated sequential addressing for FIFO-like behavior.

Each port independently selects I/O voltage via OPT pins: setting OPTL/OPTR to VDD (2.5V) configures that port for 3.3V LVTTL-compatible signaling with VDDQ = 3.3V; setting to VSS (0V) configures for 2.5V operation with VDDQ = 2.5V. Sleep mode (ZZL/ZZR) disables dynamic inputs except JTAG, reducing current to ≤15mA in full standby.

Key Specifications

Pinout & Package

70T3599S133DR is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA), designated BF208/BFG208, with 0.8mm ball pitch and 15mm × 15mm body size. All VDD pins require 2.5V supply; VDDQ pins must match OPT pin configuration (2.5V or 3.3V). A17L and A17R are no-connect (NC) pins per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362KV18-133BZI and AS7C33256P-133JCIN, the 70T3599S133DR provides higher density, per-port voltage flexibility, pipelined/flow-through configurability, and JTAG testability - making it uniquely suited for new designs requiring deterministic latency and mixed-voltage interoperability.

Availability

70T3599S133DR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and embedded networking applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for 70T3599S133DR 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 and computing markets.

The 70T35xx family was designed specifically for high-bandwidth, low-latency dual-processor and network processor interconnects - emphasizing simultaneous access, flexible voltage scaling, and deterministic timing for real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70T3599S133DR?

The 70T3599S133DR is rated for 133MHz operation across the industrial temperature range (–40°C to +85°C). Its AC specifications guarantee a 7.5ns minimum clock cycle time in pipelined mode and 25ns in flow-through mode. While the underlying architecture supports up to 200MHz (per S200 variant), the S133 suffix confirms this specific part is characterized and warranted only at 133MHz for industrial use.

Does the 70T3599S133DR support independent voltage selection on left and right ports?

Yes, the 70T3599S133DR supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VDD (2.5V) configures the left port for 3.3V LVTTL-compatible operation with VDDQL = 3.3V; setting OPTR to VSS (0V) configures the right port for 2.5V operation with VDDQR = 2.5V. This enables mixed-voltage system integration without level shifters.

What is the function of the REPEAT pin on the 70T3599S133DR?

The REPEATL and REPEATR pins on the 70T3599S133DR reset the internal address counter to the last valid address loaded via ADSL or ADSR. When asserted (VIH), the counter reuses that address on subsequent cycles - enabling hardware-based circular buffer or ping-pong memory access without CPU intervention. This feature is essential for DMA-driven streaming applications.

Is JTAG boundary scan supported on the 70T3599S133DR package?

Yes, the 70T3599S133DR in the BF208 fpBGA package fully supports IEEE 1149.1 JTAG boundary scan with dedicated TCK, TMS, TDI, TDO, and TRST pins. Unlike the DR208 PQFP variant (which omits JTAG due to pin count), the fpBGA implementation retains full test access - enabling in-system verification and debug without physical probe points.

What is the purpose of the ZZL and ZZR pins on the 70T3599S133DR?

The ZZL and ZZR pins on the 70T3599S133DR are asynchronous sleep mode enables. When asserted high, they shut down dynamic circuitry on the respective port - reducing standby current to ≤15mA (ISB3) while preserving data and allowing JTAG access. Static inputs (PL/FT, OPT, ZZ itself) remain functional, enabling wake-up via external logic without full reset.