Renesas 70V3319S133BFI8

Overview

70V3319S133BFI8 from Integrated Device Technology is a high-speed 256K × 18-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 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 memory subsystems.

For engineers reviewing the 70V3319S133BFI8 datasheet, 70V3319S133BFI8 pinout, 70V3319S133BFI8 application, or 70V3319S133BFI8 equivalent, key selection criteria include industrial temperature support (–40°C to +85°C), dual chip enable for depth expansion, JTAG-compliant testability (in BGA packages), and pipelined output mode required for deterministic latency in time-critical control loops.

Technical Context

This device implements fully synchronous operation on both ports with registered address, data, and control inputs - achieving 1.7ns setup and 0.5ns hold times at 166MHz. Its dual-cycle deselect (DCD) feature enables precise timing control during pipelined output transitions, while self-timed write logic maintains fast 6ns minimum cycle time without external wait-state generation.

The memory array uses true dual-port SRAM cells with independent byte enables (UBL/LBL and UBR/LBR) and address strobe (ADSL/ADSR) for burst-mode addressing. Counter enable (CNTENL/CNTENR) and repeat (REPEATL/REPEATR) functions support auto-incrementing address sequences for FIFO-like behavior without host CPU intervention.

Key Specifications

Pinout & Package

70V3319S133BFI8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package with 0.5mm pitch, measuring 14mm × 20mm × 1.4mm. All VDD pins require connection to 3.3V; VDDQL/VDDQR must match OPTL/OPTR logic levels (3.3V if VIH, 2.5V if VIL). JTAG signals (TCK/TMS/TDO/TDI/TRST) are omitted in this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and IDT70V27L15PF8, the 70V3319S133BFI8 provides higher density (256K vs 128K), per-port I/O voltage selection, and guaranteed pipelined timing - making it optimal for new designs requiring deterministic latency and mixed-voltage interoperability.

Availability

70V3319S133BFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3319S133BFI8 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 power management ICs for communications, computing, and industrial markets.

The 70V3319/99 family was designed specifically for high-bandwidth, low-latency dual-port memory applications in telecom line cards, FPGA-based accelerators, and real-time control systems requiring simultaneous access and industrial-grade reliability.

FAQ

What is the maximum operating frequency of the 70V3319S133BFI8 in industrial temperature range?

The 70V3319S133BFI8 is rated for 133MHz operation (7.5ns cycle time) across the full industrial temperature range of –40°C to +85°C. This specification is validated per AC Electrical Characteristics Table 11 in the datasheet, with tCYC2 = 7.5ns (max) and tCD2 = 4.2ns (max) confirmed under industrial conditions. The device does not support 166MHz operation in industrial grade - that speed grade is commercial-only (70V3319S166).

Does the 70V3319S133BFI8 support flow-through output mode?

No, the 70V3319S133BFI8 in the 128-pin TQFP package (PKG128) does not support flow-through output mode. Per datasheet Note 8 on page 4 and Pin Names table footnote 5, the PIPE/FT option is disabled due to pin count limitations - the device operates exclusively in pipelined output mode with fixed 4.2ns clock-to-data-out timing. Flow-through mode is only available in 208-pin and 256-pin BGA variants.

How is I/O voltage selected for each port on the 70V3319S133BFI8?

I/O voltage selection on the 70V3319S133BFI8 is controlled independently per port using OPTL (left port) and OPTR (right port) pins. Setting OPTL/OPTR to VIH (≥2.0V) configures the corresponding port for 3.3V I/O operation with VDDQL/VDDQR supplied at 3.3V; setting to VIL (≤0.8V) configures 2.5V operation with VDDQL/VDDQR supplied at 2.5V. Both ports may operate at different voltages simultaneously.

What is the function of the ADSL and ADSR pins on the 70V3319S133BFI8?

ADSL (Address Strobe Left) and ADSR (Address Strobe Right) are synchronous address latch enable inputs that load the current address bus value into the internal address counter on the rising edge of CLK. When asserted (low), they capture the address for subsequent read/write operations and update the REPEAT address register. These pins enable burst-mode addressing and hardware counter initialization without CPU intervention.

Is JTAG boundary scan supported on the 70V3319S133BFI8 in its TQFP package?

No, JTAG boundary scan is not supported on the 70V3319S133BFI8 in the 128-pin TQFP package. As stated in datasheet Note 9 on page 4 and Pin Configuration notes, JTAG signals (TCK, TMS, TDO, TDI, TRST) are omitted due to insufficient pin count. JTAG functionality is only available in the 208-pin fpBGA and 256-pin BGA package variants of the 70V3319/99 family.