Renesas 70V3319S166BCG

Overview

70V3319S166BCG 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, 3.6ns clock-to-data-out), supports selectable 3.3V or 2.5V I/O interfaces per port, and delivers 6Gbps aggregate bandwidth. It is used in real-time packet buffering for telecom line cards and FPGA co-processor interconnects requiring deterministic latency.

For engineers reviewing the 70V3319S166BCG datasheet, 70V3319S166BCG pinout, 70V3319S166BCG application, or 70V3319S166BCG equivalent, key selection criteria include pipelined output mode (fixed on this TQFP variant), industrial-grade timing compliance at 133MHz, dual chip enable depth expansion capability, and JTAG exclusion due to 128-pin TQFP pin count limitation.

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. Each port features independent clock (CLKL/CLKR), read/write enable (R/WL/R/WR), output enable (OEL/OER), and byte enables (UBL/LBL and UBR/LBR) for granular 9-bit upper/lower byte control.

The memory core uses true dual-port SRAM cells with self-timed write logic and supports address counter functions via ADSL/ADSR, CNTENL/CNTENR, and REPEATL/REPEATR signals. Power management includes dual CE-based standby modes (ISB1–ISB4), with full standby current as low as 15mA when both ports are deselected using CMOS-level inputs.

Key Specifications

Pinout & Package

70V3319S166BCG is housed in a 128-pin Thin Quad Flatpack (TQFP) package with 0.5mm pitch, 14mm × 20mm footprint, and 1.4mm height. All VDD pins require 3.3V supply; VDDQL/VDDQR must match OPTL/OPTR voltage selection (3.3V or 2.5V). JTAG and Flow-Through mode 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 CY7C1362BV33-166AXC and AS7C3256A-166JCIN, the 70V3319S166BCG uniquely combines fixed-pipelined latency, per-port I/O voltage selection, and integrated address counter-making it optimal for FPGA-based systems needing deterministic timing and mixed-voltage interoperability without layout change.

Availability

70V3319S166BCG is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA acceleration, real-time DSP, and industrial motion control applications requiring stable component supply and long-term production continuity.

Supply support for 70V3319S166BCG 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 and computing markets.

The 70V33xx family was designed specifically for high-bandwidth, low-latency dual-access memory applications in networking, test equipment, and digital signal processing systems where deterministic timing and concurrent port operation are mandatory.

FAQ

What is the maximum operating frequency of the 70V3319S166BCG?

The 70V3319S166BCG is rated for 166MHz operation with a 6ns clock cycle time. This is validated under commercial temperature conditions (0°C to +70°C) and requires strict adherence to 1.7ns address/control setup and 0.5ns hold timing. The device achieves 3.6ns clock-to-data-out (tCD2) in pipelined mode, making it suitable for systems demanding sub-4ns read latency.

Does the 70V3319S166BCG support JTAG boundary scan?

No, the 70V3319S166BCG does not support JTAG boundary scan. Although the IDT70V3319/99 family includes IEEE 1149.1-compliant JTAG features, this capability is explicitly excluded from the 128-pin TQFP package (PKG128) due to insufficient pin count-TDI, TDO, TCK, TMS, and TRST pins are not bonded out in the 70V3319S166BCG variant.

Can the left and right ports of the 70V3319S166BCG operate at different I/O voltages?

Yes, the 70V3319S166BCG supports independent I/O voltage selection per port. OPTL and OPTR pins configure VDDQL and VDDQR respectively: VIH selects 3.3V operation (requiring 3.3V supply), and VIL selects 2.5V operation (requiring 2.5V supply). This allows one port to interface with a 3.3V FPGA while the other connects to a 2.5V ASIC-no external level shifters needed.

Is flow-through output mode available on the 70V3319S166BCG?

No, flow-through output mode is not supported on the 70V3319S166BCG. Due to pin count limitations in the 128-pin TQFP package, the PIPE/FTL and PIPE/FTR pins are not implemented, and the device operates exclusively in pipelined output mode. This guarantees fixed 3.6ns tCD2 latency but removes configurability present in larger-package variants.

What is the purpose of the ADSL and ADSR pins on the 70V3319S166BCG?

ADSL and ADSR (Address Strobe Enable) pins on the 70V3319S166BCG latch the current address into the internal address counter on the rising edge of CLK. When combined with CNTENL/CNTENR and REPEATL/REPEATR, they enable automatic address incrementing and looping-reducing bus overhead in sequential-access applications like video frame buffering or waveform generation without CPU intervention.