Renesas 70V3599S133BF

Overview

70V3599S133BF from IDT (now Renesas) is a high-speed 128K × 36-bit synchronous dual-port SRAM 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 packet buffering for telecom line cards and FPGA co-processor interconnects.

For engineers reviewing the 70V3599S133BF datasheet, 70V3599S133BF pinout, 70V3599S133BF application, or 70V3599S133BF 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, and separate byte enables for 9-bit-wide data bus matching in burst-mode systems.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports - delivering 1.7ns setup and 0.5ns hold times at 166MHz. Its internal architecture includes independent address counters with repeat and enable features, self-timed write logic, and Dual Cycle Deselect (DCD) for pipelined mode stability.

The memory supports mixed-voltage interfacing: core VDD = 3.3V ±150mV, while each port's I/O voltage (VDDQ) is independently configurable to either 3.3V or 2.5V via OPTL/OPTR pins - enabling seamless integration with 2.5V FPGAs and 3.3V processors without level shifters.

Key Specifications

Pinout & Package

70V3599S133BF 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 CY7C1362BV33-133BZI and AS7C3256B-133BIN, the 70V3599S133BF provides greater memory depth, per-port voltage configurability, integrated address counter logic, and JTAG testability - making it optimal for complex, high-reliability embedded systems requiring flexible memory interfacing and debug support.

Availability

70V3599S133BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and FPGA-based signal processing applications requiring stable component supply and long-term lifecycle assurance.

Supply support for 70V3599S133BF 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

Renesas Electronics (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and high-performance memory solutions for automotive, industrial, and communications markets.

The 70V3599S133BF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency memory sharing between independent processors, FPGAs, and ASICs in real-time embedded systems.

FAQ

What is the maximum guaranteed operating frequency of the 70V3599S133BF across its full industrial temperature range?

The 70V3599S133BF is guaranteed to operate at 133MHz (7.5ns 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 supply and loading conditions.

Does the 70V3599S133BF support independent I/O voltage selection for its left and right ports?

Yes, the 70V3599S133BF supports independent I/O voltage selection: OPTL configures the left port's VDDQL supply (3.3V or 2.5V), and OPTR configures the right port's VDDQR supply (3.3V or 2.5V). This allows one port to interface with a 2.5V FPGA bank while the other connects to a 3.3V microcontroller - without external level shifters.

How does the Dual Cycle Deselect (DCD) feature function in the 70V3599S133BF's pipelined output mode?

In pipelined output mode (PL/FTX = VIH), chip enables CE0 and CE1 are double-buffered - meaning a deselect command takes two clock cycles to propagate through the internal pipeline. This prevents metastability and ensures clean output disable timing during rapid port enable/disable sequences, improving signal integrity in high-speed depth-expanded memory systems.

Can the 70V3599S133BF be used in flow-through output mode for zero-latency reads, and what are the timing trade-offs?

Yes, setting PL/FTL or PL/FTR to VIL configures the corresponding port for flow-through output mode, delivering data within one clock cycle (tCD1 ≤ 15ns max). However, this mode increases minimum cycle time to 25ns (40MHz effective) versus 7.5ns (133MHz) in pipelined mode - trading latency for bandwidth depending on system timing constraints.

What is the role of the REPEAT and CNTEN signals in the 70V3599S133BF's address counter functionality?

CNTEN enables the internal address counter on the rising edge of CLK; when asserted (VIL), the counter increments automatically. REPEAT resets the counter to the last valid address loaded via ADS - enabling circular buffer behavior. Both signals operate independently per port and are asynchronous to memory access, allowing deterministic address sequencing without host CPU intervention.