Renesas 70T3599S133BC8

Overview

70T3599S133BC8 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 interfaces per port, and features pipelined or flow-through output modes for burst data transfer in telecom switching fabric.

For engineers reviewing the 70T3599S133BC8 datasheet, 70T3599S133BC8 pinout, 70T3599S133BC8 application, or 70T3599S133BC8 equivalent, this device is selected for deterministic latency-critical dual-processor interconnect, real-time packet buffering, and FPGA-to-FPGA shared memory where concurrent port access and sub-5ns clock-to-data timing are required.

Technical Context

The 70T3599S133BC8 implements fully synchronous operation on both left and right ports with independent clock inputs (CLKL/CLKR), dual chip enables (CE0/CE1 per port), and byte-enable granularity (BE0–BE3) for 9-bit-wide data segments. Its address counter logic supports repeat and auto-increment modes via ADS, CNTEN, and REPEAT signals - critical for sequential DMA transfers without external address generation.

It integrates JTAG IEEE 1149.1 boundary-scan support (in BGA packages only), interrupt and collision detection flags (INTR/COLR, INTL/COLL), and sleep mode control (ZZL/ZZR) that disables dynamic inputs while preserving JTAG accessibility. The OPTL/OPTR pins configure each port's I/O voltage independently - enabling mixed-voltage system interfacing without level shifters.

Key Specifications

Pinout & Package

70T3599S133BC8 is packaged in a 256-pin Ball Grid Array (BC256) with 1.0mm ball pitch and 17mm × 17mm footprint. Power delivery uses distributed VDD (core) and VDDQ (I/O) balls; ground (VSS) balls are placed adjacent to all I/O banks for signal integrity. NC pins include A17L and A17R - confirmed non-connected 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 CY7C1362BV33-133BZI and IDT70V27L15PF8, the 70T3599S133BC8 uniquely delivers 133MHz pipelined operation with per-port voltage selection and hardware collision detection - making it the sole option for high-reliability, mixed-voltage, real-time dual-processor systems requiring guaranteed sub-5ns latency.

Availability

70T3599S133BC8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and FPGA-based embedded systems requiring stable component supply, long-term lifecycle assurance, and industrial-temperature qualification.

Supply support for 70T3599S133BC8 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 solutions for communications and computing markets.

The 70T35xx family was designed specifically for high-bandwidth, low-latency dual-processor interconnect in telecom switches, radar systems, and real-time embedded controllers - prioritizing deterministic timing, voltage flexibility, and hardware coherency mechanisms.

FAQ

What is the maximum operating frequency of the 70T3599S133BC8?

The 70T3599S133BC8 is rated for 133MHz operation with a maximum clock cycle time of 7.5ns in pipelined mode. This frequency is guaranteed across the full industrial temperature range (−40°C to +85°C) and applies to both left and right ports independently. The device does not support 166MHz or 200MHz variants in the BC256 package per datasheet Table 9 footnote 7.

Does the 70T3599S133BC8 support JTAG boundary-scan testing?

Yes, the 70T3599S133BC8 supports IEEE 1149.1 JTAG boundary-scan via dedicated TDI, TDO, TCK, TMS, and TRST pins - but only in the 256-pin BGA (BC256) package. JTAG is explicitly disabled in PQFP and fpBGA variants due to pin count limitations, as noted in datasheet Pin Configuration section footnote 9.

How does the collision detection feature work in the 70T3599S133BC8?

The 70T3599S133BC8 detects simultaneous write operations to the same memory address across its left and right ports and asserts the COLL (left) or COLR (right) output flag within 4.2ns. This hardware mechanism eliminates software polling and enables immediate error handling - critical for lock-free inter-processor communication protocols implemented in the 70T3599S133BC8.

Can the left and right ports of the 70T3599S133BC8 operate at different I/O voltages?

Yes, the 70T3599S133BC8 supports independent I/O voltage selection per port using OPTL and OPTR pins. Setting OPTL to VDD (2.5V) configures the left port for 3.3V I/O levels with VDDQL = 3.3V; setting OPTR to VSS (0V) configures the right port for 2.5V I/O levels with VDDQR = 2.5V - enabling direct interfacing with mixed-voltage FPGAs without external level shifters.

What is the purpose of the PL/FTL and PL/FTR pins on the 70T3599S133BC8?

The PL/FTL (left) and PL/FTR (right) pins on the 70T3599S133BC8 select between pipelined (VIH) and flow-through (VIL) output modes. In pipelined mode, data appears on the I/O bus one clock cycle after the address is latched (tCD2 = 4.2ns max), enabling higher throughput. In flow-through mode, data appears after tCD1 = 15ns max - used when minimum latency per access is prioritized over sustained bandwidth.