Renesas 70V3319S166BF8

Overview

70V3319S166BF8 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 166MHz (6ns cycle time), delivers 6Gbps aggregate bandwidth, supports selectable 3.3V or 2.5V I/O voltage per port, and features pipelined output mode only (no flow-through option) in its 128-pin TQFP package. It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3319S166BF8 datasheet, 70V3319S166BF8 pinout, 70V3319S166BF8 application, or 70V3319S166BF8 equivalent, key selection criteria include guaranteed 166MHz operation under commercial temperature (0°C to +70°C), dual chip enable support for depth expansion, JTAG-disabled 128-pin TQFP footprint, and independent VDDQ/OPT configuration per port for mixed-voltage system interfacing.

Technical Context

This device implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports-enabling minimal 1.7ns setup and 0.5ns hold times at 166MHz. Its internal architecture includes dual address counters with ADS strobe, repeat, and counter-enable functions, allowing burst-mode sequential addressing without external logic.

The memory array uses true dual-port cells, not pseudo-dual-port or FIFO-based emulation. All timing parameters-including tCD2 = 3.6ns clock-to-data-out (pipelined), tCYC2 = 6ns cycle time, and port-to-port clock offset tCO = 5ns-are specified and tested for the exact 70V3319S166BF8 variant in PKG128 package at VDD = 3.3V ±150mV and TA = 0°C to +70°C.

Key Specifications

Pinout & Package

70V3319S166BF8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 0.5 mm lead pitch. The package does not support JTAG or PL/FT mode selection due to pin count constraints; all I/Os operate 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 CY7C1362BV18 and IDT70V27L15PF8, the 70V3319S166BF8 uniquely combines 166MHz performance in a 128-pin TQFP with integrated address counter logic and per-port I/O voltage flexibility-making it optimal for space-constrained, mixed-voltage, high-throughput embedded systems.

Availability

70V3319S166BF8 is available at Aetrix Electronics and suitable for telecom infrastructure, broadcast video equipment, FPGA-based accelerators, and military radar signal processing requiring stable component supply across extended production lifecycles.

Supply support for 70V3319S166BF8 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 sensor solutions for communications, computing, and industrial markets.

The 70V3319/99 family was designed specifically for high-bandwidth, low-latency dual-access memory applications in networking and digital signal processing systems where deterministic timing and mixed-voltage interoperability are critical.

FAQ

What is the maximum guaranteed operating frequency for the 70V3319S166BF8?

The 70V3319S166BF8 is rated for guaranteed operation up to 166MHz in commercial temperature range (0°C to +70°C), with a minimum clock cycle time of 6ns. This specification is validated across process, voltage, and temperature corners and applies to both ports simultaneously under full-load conditions with pipelined output mode enabled.

Does the 70V3319S166BF8 support flow-through output mode?

No, the 70V3319S166BF8 does not support flow-through output mode. Due to pin count limitations in its 128-pin TQFP (PKG128) package, the FT/PIPEL and FT/FTR pins are not bonded out, and the device operates exclusively in pipelined output mode. This is explicitly stated in the datasheet note on page 4: "PIPE/FT option in PKG128 is not supported… Device is pipelined outputs only on each port."

Can the left and right ports of the 70V3319S166BF8 operate at different I/O voltages?

Yes, the 70V3319S166BF8 supports independent I/O voltage selection per port: OPTL controls the left port's VDDQL rail (3.3V or 2.5V), and OPTR controls the right port's VDDQR rail. When OPTL = VIH, VDDQL must be 3.3V; when OPTL = VIL, VDDQL must be 2.5V - and likewise for the right port. This enables mixed-voltage system integration without external level shifters.

Is JTAG debugging supported on the 70V3319S166BF8?

No, JTAG is not supported on the 70V3319S166BF8. As confirmed in the datasheet (page 4, Note 9), "Due to the limited pin count, JTAG is not supported in the PKG128 package." The TDI, TDO, TCK, TMS, and TRST pins are NC (no-connect) in this variant. JTAG functionality is only available on 208-pin fpBGA and 256-pin BGA versions of the 70V3319/99 family.

What is the purpose of the ADSL and ADSR pins on the 70V3319S166BF8?

The ADSL and ADSR pins are Address Strobe Enable inputs that latch the current address into the internal address counter on the rising edge of CLK. When asserted (ADSL = VIL), they enable burst-mode sequential addressing - eliminating the need for external address increment logic. Combined with CNTENL/CNTENR and REPEATL/REPEATR, they provide hardware-accelerated address generation for streaming applications like packet buffering or video frame storage.