Renesas 70V3599S133BC8

Overview

70V3599S133BC8 from IDT (now Renesas) is a high-speed 128K × 36-bit synchronous dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 133MHz (7.5ns cycle time), supports selectable pipelined or flow-through output modes, and features dual 3.3V/2.5V I/O voltage capability per port - used in high-bandwidth inter-processor communication and FPGA co-processor buffering.

For engineers reviewing the 70V3599S133BC8 datasheet, 70V3599S133BC8 pinout, 70V3599S133BC8 application, or 70V3599S133BC8 equivalent, key selection criteria include guaranteed 133MHz operation across industrial temperature (−40°C to +85°C), JTAG IEEE 1149.1 compliance, dual-chip-enable depth expansion support, and independent VDDQ/OPT-controlled I/O voltage selection per port.

Technical Context

This device implements fully synchronous dual-port SRAM architecture with register-staged address, data, and control inputs on both ports - delivering 1.7ns setup and 0.5ns hold times at 166MHz. Its internal counter logic supports auto-incrementing address generation via CNTEN/ADSR/REPEAT signals, enabling burst transfers without external address sequencing.

The memory supports two distinct output timing modes: pipelined (6ns cycle, 3.6ns clock-to-data) for maximum throughput, and flow-through (25ns cycle, 15ns clock-to-data) for low-latency deterministic access. Dual-cycle deselect (DCD) and byte-enable masking (BE0–BE3) provide precise bus-matching control for multiplexed data paths.

Key Specifications

Pinout & Package

70V3599S133BC8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8mm ball pitch and 15mm × 15mm body size. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated clock, address, data I/O, control, and power/ground balls.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C33128P33Z-133BIN, the 70V3599S133BC8 uniquely combines per-port I/O voltage selection, IEEE 1149.1 JTAG, and guaranteed 133MHz industrial operation - making it optimal for mixed-voltage, test-critical, and thermally demanding embedded systems.

Availability

70V3599S133BC8 is available at Aetrix Electronics and suitable for network packet buffering, FPGA-CPU co-processing interfaces, industrial PLC real-time I/O hubs, and medical imaging data pipelines requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 70V3599S133BC8 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V3599S133BC8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency, multi-processor shared-memory architectures in telecom infrastructure, test equipment, and real-time control systems.

FAQ

What is the guaranteed maximum operating frequency of the 70V3599S133BC8 across its full industrial temperature range?

The 70V3599S133BC8 is guaranteed to operate at 133MHz (7.5ns clock cycle time) over the full industrial temperature range of −40°C to +85°C. This specification is validated per AC Electrical Characteristics Table 11 in the official datasheet and applies to both pipelined and flow-through output modes under specified VDD and VDDQ conditions.

Does the 70V3599S133BC8 support independent I/O voltage selection on left and right ports, and how is it configured?

Yes, the 70V3599S133BC8 supports independent 3.3V or 2.5V I/O operation per port. The left port voltage is set by OPTL: VIH (≥2.0V) selects 3.3V, VIL (≤0.8V) selects 2.5V; similarly, OPTR controls the right port. Corresponding VDDQL and VDDQR supplies must be set to match - 3.3V ±150mV or 2.5V ±100mV respectively - as defined in Tables 5a and 5b of the datasheet.

How does the dual-chip-enable (CE0/CE1) scheme on the 70V3599S133BC8 enable depth expansion without additional logic?

The 70V3599S133BC8 uses CE0 and CE1 as complementary enables: the port activates only when CE0 = low and CE1 = high. To expand depth, multiple devices share address, data, and clock lines; each device's CE0 is driven by a unique decoder output while CE1 remains tied high. This eliminates need for external AND/OR gates - simplifying PCB layout and reducing propagation delay in wide-memory systems.

What is the function of the REPEAT signal in the 70V3599S133BC8, and when is it typically used?

The REPEAT signal resets the internal address counter to the last valid address loaded via ADS (Address Strobe). It is used in burst transfer scenarios where repeated access to the same memory location is required - such as refreshing status registers or polling hardware flags. Unlike simple address hold, REPEAT preserves the counter state for subsequent increments, enabling seamless restart of sequential access after interruption.

Is JTAG boundary-scan support available on the 70V3599S133BC8, and which pins are dedicated to this function?

Yes, the 70V3599S133BC8 fully supports IEEE 1149.1 JTAG boundary-scan. Dedicated pins include TCK (Test Clock), TMS (Test Mode Select), TDI (Test Data In), TDO (Test Data Out), and TRST (Test Reset). These signals are electrically isolated from functional I/O and operate independently of memory operation - enabling in-system test, debug, and programming verification without disrupting system functionality.