Renesas 70V3599S133BCI8

Overview

70V3599S133BCI8 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 chip enables for seamless depth expansion in telecom switching and packet buffering applications.

For engineers reviewing the 70V3599S133BCI8 datasheet, 70V3599S133BCI8 pinout, 70V3599S133BCI8 application, or 70V3599S133BCI8 equivalent, key selection criteria include its 133MHz industrial-grade timing, independent 2.5V/3.3V I/O voltage support per port, JTAG IEEE 1149.1 compliance, and dual-cycle deselect capability in pipelined mode.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, and control inputs-enabling 1.7ns setup and 0.5ns hold times at 166MHz. Its internal counter logic supports address auto-increment and repeat functions via ADS, CNTEN, and REPEAT signals, eliminating external address generation in burst-access systems.

The memory array uses true dual-port cells with separate byte-enable controls (BE0–BE3 per port) for 9-bit granularity, and supports independent power-domain configuration: core VDD = 3.3V ±150mV while each port's I/O voltage (VDDQ) is selectable between 3.3V or 2.5V via OPTL/OPTR pins-critical for mixed-voltage system interfacing.

Key Specifications

Pinout & Package

70V3599S133BCI8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 0.8mm ball pitch and 15mm × 15mm body size. Pin assignments are symmetric for left (L) and right (R) ports, with dedicated clocks (CLKL/CLKR), chip enables (CE0L/CE1L, CE0R/CE1R), address buses (A0L–A16L, A0R–A16R), 36-bit bidirectional I/Os (I/O0L–I/O35L, I/O0R–I/O35R), and independent control signals including PL/FTL/PL/FTR, ADSL/ADSR, CNTENL/CNTENR, and REPEATL/REPEATR.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C33128A-133BIN, the 70V3599S133BCI8 uniquely combines full 128K × 36 density, per-port I/O voltage flexibility, JTAG testability, and configurable latency modes-making it optimal for complex, mixed-voltage, high-reliability embedded systems requiring deterministic timing and field-testability.

Availability

70V3599S133BCI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and network equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V3599S133BCI8 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 industrial, automotive, and communications markets.

The 70V3599S133BCI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for low-latency, deterministic memory access in packet-switched networks, real-time control systems, and multi-processor coherency buffers.

FAQ

What is the maximum operating frequency of the 70V3599S133BCI8 in industrial temperature range?

The 70V3599S133BCI8 is rated for 133MHz operation (7.5ns cycle time) across the full industrial temperature range of −40°C to +85°C. This is confirmed in the AC Electrical Characteristics table (Table 11), where tCYC2 (pipelined mode) is specified at 7.5ns max for the 70V3599S133 variant. The device does not support 166MHz operation under industrial conditions.

Does the 70V3599S133BCI8 support independent I/O voltage selection on left and right ports?

Yes, the 70V3599S133BCI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3V I/O operation (VDDQL = 3.3V), while OPTL = VIL configures it for 2.5V (VDDQL = 2.5V). The same applies independently to the right port using OPTR. This enables mixed-voltage system integration without external level shifters.

What is the function of the REPEAT signal in the 70V3599S133BCI8?

The REPEAT signal in the 70V3599S133BCI8 resets the internal address counter to the last valid address loaded via ADS (Address Strobe Enable). When asserted (REPEATX = VIH), it causes the counter to repeatedly output that stored address-enabling circular buffer or ping-pong memory access patterns without host CPU intervention. This value is not preset at power-up and must be initialized via an ADS cycle.

How many standby current modes does the 70V3599S133BCI8 support, and what are their typical values?

The 70V3599S133BCI8 supports four distinct standby current modes: ISB1 (both ports disabled, TTL inputs), ISB2 (one port active), ISB3 (full standby, CMOS inputs), and ISB4 (one-port CMOS standby). At industrial temperature, typical ISB3 is 15mA and ISB1 is 115mA. These modes are controlled solely by CE0/CE1 states and input voltage levels-no command sequences are required.

Is JTAG boundary-scan supported on the 70V3599S133BCI8, and which standard does it comply with?

Yes, the 70V3599S133BCI8 includes full IEEE 1149.1-compliant JTAG boundary-scan functionality. Pins TCK, TMS, TDI, TDO, and TRST are dedicated to this interface, enabling production testing, in-system verification, and debug of PCB interconnects and device functionality without physical probe access.