Renesas 70V3319S166PRFG8

Overview

70V3319S166PRFG8 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 due to 128-pin TQFP pin count limitation). It is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3319S166PRFG8 datasheet, 70V3319S166PRFG8 pinout, 70V3319S166PRFG8 application, or 70V3319S166PRFG8 equivalent, key selection criteria include guaranteed 166MHz operation under commercial temperature, dual chip enable for depth expansion, separate byte enables for bus matching, JTAG support exclusion in this package, and mandatory pipelined output configuration.

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 memory array uses true dual-port cells, not pseudo-dual-port or multiplexed architectures, allowing concurrent access without arbitration logic.

The 70V3319S166PRFG8 integrates independent address counters per port with CNTEN/REPEAT/ADSR controls, supports Dual Cycle Deselect (DCD) in pipelined mode, and provides automatic power-down via dual CE pins-reducing standby current to 15mA in full CMOS-level standby. Core VDD is fixed at 3.3V ±150mV; I/O voltage per port is selected independently via OPTL/OPTR pins (3.3V or 2.5V).

Key Specifications

Pinout & Package

70V3319S166PRFG8 is packaged in a 128-pin Thin Quad Flatpack (TQFP) with 0.4 mm lead pitch and 14 mm × 20 mm body size. The package does not support JTAG or PL/FT mode selection due to pin count constraints-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 CY7C1362BV33-166AXC and AS7C3256B-166JCIN, the 70V3319S166PRFG8 uniquely supports per-port I/O voltage selection and integrated address counter logic-reducing FPGA resource usage and enabling mixed-voltage system integration without level shifters.

Availability

70V3319S166PRFG8 is available at Aetrix Electronics and suitable for telecom infrastructure, network processor interfacing, real-time video buffering, and radar signal processing applications requiring stable component supply across extended production lifecycles.

Supply support for 70V3319S166PRFG8 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 high-performance interconnect solutions for communications and computing markets.

The 70V33xx family was designed specifically for high-bandwidth, low-latency dual-access memory applications in telecom, networking, and digital signal processing systems-emphasizing deterministic timing, voltage flexibility, and integrated control logic.

FAQ

What is the maximum guaranteed operating frequency of the 70V3319S166PRFG8?

The 70V3319S166PRFG8 is rated for guaranteed operation at 166MHz (6ns clock cycle time) under commercial temperature conditions (0°C to +70°C). This is confirmed by AC timing parameters tCYC2 = 6ns (max) and tCD2 = 3.6ns (max) in the official datasheet. It does not support 133MHz industrial-grade operation-the 70V3319S166PRFG8 variant is commercial-only.

Does the 70V3319S166PRFG8 support flow-through output mode?

No, the 70V3319S166PRFG8 does not support flow-through output mode. As explicitly stated in the datasheet notes for the PKG128 (128-pin TQFP) package, "PIPE/FT option is not supported due to limited pin count. Device is pipelined outputs only on each port." The FT/PIPE pins are tied internally to force pipelined operation-no external configuration can enable flow-through behavior.

Can the left and right ports of the 70V3319S166PRFG8 operate at different I/O voltages?

Yes, the left and right ports of the 70V3319S166PRFG8 can operate at different I/O voltages. OPTL and OPTR pins are independent: setting OPTL = VIH (3.3V) and OPTR = VIL (0V) configures the left port for 3.3V I/O levels (requiring VDDQL = 3.3V) and the right port for 2.5V I/O levels (requiring VDDQR = 2.5V). This enables direct interfacing with mixed-voltage SoCs or FPGAs without external level shifters.

Is JTAG debugging supported on the 70V3319S166PRFG8?

No, JTAG debugging is not supported on the 70V3319S166PRFG8. The datasheet explicitly states: "Due to limited pin count, JTAG is not supported on the 128-pin TQFP package." Pins TDI, TDO, TCK, TMS, and TRST are present but functionally disabled in this package variant. JTAG is only available on the 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 70V3319S166PRFG8?

The ADSL and ADSR pins on the 70V3319S166PRFG8 are Address Strobe Enable inputs that latch the current address into the internal address counter. When asserted (low), they load the address bus value and enable auto-increment functionality for burst transfers. Combined with CNTENL/CNTENR and REPEATL/REPEATR, they allow hardware-controlled sequential memory access-reducing CPU or controller overhead in DMA-like operations such as packet header parsing or FFT coefficient streaming.