Renesas 70V3319S166PRF8

Overview

70V3319S166PRF8 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 interfaces per port, and features pipelined output mode only (no flow-through) in its 128-pin TQFP package. It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3319S166PRF8 datasheet, 70V3319S166PRF8 pinout, 70V3319S166PRF8 application, or 70V3319S166PRF8 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 voltage selection per port via OPTL/OPTR pins.

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, CNTEN enable, and REPEAT latch functionality for burst sequential addressing without external logic.

The 70V3319S166PRF8 uses separate byte enables (UBL/LBL and UBR/LBR) for 9-bit upper and 9-bit lower data segments, supports Dual Cycle Deselect (DCD) in pipelined mode, and integrates automatic power-down via CE0/CE1 assertion-reducing standby current to 125mA (typ) when both ports are deselected.

Key Specifications

Pinout & Package

70V3319S166PRF8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package with 0.5 mm pitch, body size 14 mm × 20 mm × 1.4 mm. All VDD pins require 3.3V supply; VDDQL/VDDQR must match OPTL/OPTR logic levels (3.3V if VIH, 2.5V if VIL). JTAG and flow-through mode are disabled due to pin count limitation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and IDT70V9369S166BG, the 70V3319S166PRF8 offers unique value in cost-sensitive, space-constrained telecom modules where 128-pin TQFP fit and per-port I/O voltage flexibility are mandatory - but sacrifices JTAG and flow-through mode support.

Availability

70V3319S166PRF8 is available at Aetrix Electronics and suitable for telecom infrastructure, network switching, real-time DSP, and industrial motion control applications requiring stable component supply, long-term lifecycle assurance, and commercial-grade 166MHz performance.

Supply support for 70V3319S166PRF8 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 70V3319S166PRF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for low-latency, deterministic data exchange in packet-processing and real-time control systems.

FAQ

What is the maximum operating frequency supported by the 70V3319S166PRF8?

The 70V3319S166PRF8 is rated for 166 MHz operation with a 6 ns clock cycle time under commercial temperature conditions (0°C to +70°C). This is confirmed in the AC Electrical Characteristics table (Table 11), where tCYC2 (pipelined cycle time) is specified at 6 ns max for the 70V3319/99S166 version. It does not support 133 MHz industrial-grade operation - that variant is designated separately (e.g., 70V3319S133).

Does the 70V3319S166PRF8 support flow-through output mode?

No, the 70V3319S166PRF8 does not support flow-through output mode. As explicitly stated in the datasheet (page 4, Note 8 and page 5, Note 5), the PKG128 (128-pin TQFP) package lacks sufficient pins to implement the PIPE/FT selection function. The device operates exclusively in pipelined output mode, with tCD2 = 3.6 ns (max) clock-to-data valid timing.

Can the left and right ports of the 70V3319S166PRF8 operate at different I/O voltages?

Yes, the 70V3319S166PRF8 supports independent I/O voltage selection per port. OPTL configures VDDQL (left port I/O supply), and OPTR configures VDDQR (right port I/O supply). Each can be set to 3.3V (OPT = VIH) or 2.5V (OPT = VIL), allowing mixed-voltage interfacing - for example, left port at 3.3V to an FPGA, right port at 2.5V to a DSP - as detailed in Table 5a/b and Pin Name Table (page 5).

Is JTAG debugging supported on the 70V3319S166PRF8?

No, JTAG is not supported on the 70V3319S166PRF8. The 128-pin TQFP package lacks dedicated TDI, TDO, TCK, TMS, and TRST pins required for IEEE 1149.1 compliance. As noted on page 4 (Note 9) and page 1, "Due to limited pin count, JTAG is not supported on the 128-pin TQFP package." JTAG is only available on the 208-pin and 256-pin BGA variants.

What is the purpose of the ADSL and ADSR pins on the 70V3319S166PRF8?

The ADSL (Address Strobe Left) and ADSR (Address Strobe Right) pins load the current address bus value into the internal address counter on the next rising clock edge. When asserted (VIL), they enable automatic sequential addressing - allowing burst reads/writes without incrementing the external address bus. This feature, combined with CNTENL/CNTENR and REPEATL/REPEATR, implements hardware-managed circular buffers and FIFOs without external logic, as defined in Truth Table II (page 6).