Renesas 70T3599S133BC

Overview

70T3599S133BC 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 applications in telecom line cards and network packet buffers.

For engineers reviewing the 70T3599S133BC datasheet, 70T3599S133BC pinout, 70T3599S133BC application, or 70T3599S133BC equivalent, this device delivers deterministic low-latency memory access with JTAG-compliant boundary scan, industrial temperature support (–40°C to +85°C), and dual chip enables for seamless depth expansion in high-throughput switching fabric designs.

Technical Context

The 70T3599S133BC 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 for 133MHz in industrial grade). Its dual-port memory array uses true dual-port cells, not pseudo-dual-port emulation, allowing concurrent access without arbitration logic.

It integrates independent address counters with ADS strobe, CNTEN enable, and REPEAT reset per port, plus collision detection and interrupt flags for real-time bus coordination. The device supports JTAG IEEE 1149.1 test access via dedicated TDI/TDO/TCK/TMS/TRST pins and includes sleep mode (ZZL/ZZR) that disables dynamic inputs while preserving JTAG functionality.

Key Specifications

Pinout & Package

70T3599S133BC is packaged in a 256-pin Ball Grid Array (BC256) with 17mm × 17mm footprint and 1.0mm ball pitch. All VDD pins require 2.5V supply; VDDQ pins must match OPT pin selection (3.3V if OPT = VDD, 2.5V if OPT = VSS). A17L and A17R are no-connect 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 CY7C1362BV33-133AXC and AS7C33256PFS-133BIN, the 70T3599S133BC uniquely combines industrial temperature support, selectable 2.5V/3.3V I/O per port, and true dual-port concurrency-making it irreplaceable in deterministic real-time systems requiring guaranteed sub-5ns access and hardware collision management.

Availability

70T3599S133BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply across long product lifecycles and rigorous environmental certification.

Supply support for 70T3599S133BC 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 sensor signal conditioning ICs for communications and computing markets.

The 70T35xx family was designed specifically for high-bandwidth, low-latency dual-port memory applications in networking equipment, broadcast video systems, and real-time control systems where deterministic access and concurrent port operation are mandatory.

FAQ

What is the maximum guaranteed operating frequency of the 70T3599S133BC?

The 70T3599S133BC is rated for 133MHz operation across the industrial temperature range (–40°C to +85°C), with 4.2ns maximum access time. While the underlying architecture supports 200MHz in commercial-grade variants (e.g., 70T3599S200BC), the "S133" suffix explicitly denotes the 133MHz industrial version-validated for full performance under thermal stress without derating.

Does the 70T3599S133BC support mixed-voltage operation between its left and right ports?

Yes, the 70T3599S133BC supports independent I/O voltage selection per port: OPTL configures the left port's VDDQL supply (2.5V or 3.3V), and OPTR configures the right port's VDDQR supply. This allows one port to interface with a 2.5V FPGA while the other connects to a 3.3V microcontroller-without level shifters-provided each VDDQ rail matches its OPT setting.

How does the collision detection feature work in the 70T3599S133BC?

The 70T3599S133BC asserts COLL (left) or COLR (right) output flags when both ports attempt to access the same memory address simultaneously during a write cycle. Detection is hardware-implemented with 4.2ns set/reset timing (tCOLS/tCOLR), and flags remain asserted until cleared by a subsequent non-colliding access-enabling software or logic-based resolution without CPU polling overhead.

Is JTAG boundary scan supported on the 70T3599S133BC, and what are the requirements?

Yes, the 70T3599S133BC implements full IEEE 1149.1 JTAG boundary scan with dedicated TDI, TDO, TCK, TMS, and TRST pins. JTAG remains functional even in sleep mode (ZZL/ZZR asserted), but boundary scan operation is not recommended during sleep per datasheet guidance. No external pull-ups are required-the internal weak pull-ups meet JTAG voltage thresholds.

What package options are available for the 70T3599S133BC, and which one is used in this variant?

The 70T3599S133BC is offered exclusively in the 256-pin BGA (BC256) package with 17mm × 17mm body and 1.0mm ball pitch. The "BC" suffix in the part number explicitly denotes this BGA variant; fpBGA (BF208) and PQFP (DR208) packages are available for other speed grades but not for the S133 industrial version per IDT documentation.