Renesas 70V3319S133PRFI

Overview

70V3319S133PRFI from Integrated Device Technology is a high-speed 256K × 18-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 3.3V or 2.5V I/O interfaces per port, and delivers 4.2ns clock-to-data-out in pipelined mode - optimized for real-time packet buffering in telecom line cards and FPGA co-processor data exchange.

For engineers reviewing the 70V3319S133PRFI datasheet, 70V3319S133PRFI pinout, 70V3319S133PRFI application, or 70V3319S133PRFI equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), dual chip enable depth expansion capability, JTAG-compliant testability (in BGA packages), and pipelined output mode required for deterministic latency in high-throughput inter-processor communication.

Technical Context

This device implements fully synchronous dual-port operation with separate address, data, and control registers on each port - enabling minimal 1.7ns setup and 0.5ns hold times at 133MHz. Its internal architecture includes dual address counters with ADS-triggered load, repeat, and counter-enable functions for burst-mode sequential addressing without external logic.

The memory array uses true dual-port SRAM cells, not pseudo-dual-port or FIFO-based emulation. Each port features independent VDDQ supply and OPT pin configuration, allowing mixed-voltage operation (e.g., 3.3V left port / 2.5V right port) while maintaining a unified 3.3V core supply (VDD). Pipelined output mode is fixed for this TQFP variant due to pin count constraints.

Key Specifications

Pinout & Package

70V3319S133PRFI is packaged in a 128-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, body size 14 mm × 20 mm × 1.4 mm. JTAG and PL/FT mode are disabled in this package due to pin count limitations; device operates exclusively in pipelined output mode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C33256PFSI-133BIN, the 70V3319S133PRFI uniquely integrates per-port voltage selection, address counters with REPEAT, and industrial-grade thermal qualification - making it the only option supporting autonomous burst-mode buffering in mixed-voltage, real-time embedded systems.

Availability

70V3319S133PRFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and FPGA-based embedded systems requiring stable component supply across extended product lifecycles.

Supply support for 70V3319S133PRFI 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V3319S133PRFI belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic-latency, multi-processor data sharing in telecom and real-time control applications.

FAQ

What is the maximum operating frequency of the 70V3319S133PRFI?

The 70V3319S133PRFI is rated for 133 MHz operation with a guaranteed 7.5 ns clock cycle time across the industrial temperature range (–40°C to +85°C). This frequency is supported in both commercial and industrial grades, unlike the 166 MHz variant which is commercial-only. The device achieves this using pipelined output mode, delivering 4.2 ns clock-to-data-out performance.

Does the 70V3319S133PRFI support JTAG boundary scan?

No, the 70V3319S133PRFI in its 128-pin TQFP package does not support JTAG boundary scan. Per the datasheet, JTAG functionality (TCK, TMS, TDI, TDO, TRST) is omitted from this package due to pin count limitations. JTAG is only available on the 208-pin and 256-pin BGA variants of the 70V3319/99 family.

Can the left and right ports of the 70V3319S133PRFI operate at different I/O voltages?

Yes, the 70V3319S133PRFI supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures the left port for 3.3V I/O, while setting OPTR to VIL (0V) configures the right port for 2.5V I/O - enabling direct interfacing with mixed-voltage systems without external level shifters.

What is the purpose of the ADS and REPEAT signals on the 70V3319S133PRFI?

The ADS (Address Strobe) signal loads the current address bus value into the internal address counter, while REPEAT resets the counter to that last loaded address. Together, they enable autonomous burst-mode sequential addressing - for example, in packet buffering where consecutive memory locations must be accessed without CPU intervention. This eliminates external address generation logic.

Is flow-through output mode available on the 70V3319S133PRFI?

No, flow-through output mode is not available on the 70V3319S133PRFI. Due to pin count limitations in the 128-pin TQFP package, the PIPE/FTL and PIPE/FTR pins are not bonded out, and the device operates exclusively in pipelined output mode. This is explicitly stated in the datasheet notes for PKG128.