Renesas 70V7339S166BFG

Overview

70V7339S166BFG from Integrated Device Technology is a high-speed 512K × 18 (9 Mbit) synchronous bank-switchable dual-ported SRAM with independent left/right ports, 166 MHz operation (3.6 ns access), industrial temperature support (−40°C to +85°C), and selectable 3.3 V or 2.5 V I/O interface per port. It enables concurrent read/write access to separate 8K × 18 memory banks in telecom switching fabric and real-time packet buffering.

For engineers reviewing the 70V7339S166BFG datasheet, 70V7339S166BFG pinout, 70V7339S166BFG application, or 70V7339S166BFG equivalent, key selection criteria include bank-switchable arbitration, pipelined/flow-through output mode selection, JTAG IEEE 1149.1 compliance, dual chip enable for depth expansion, and independent VDDQ voltage control per port.

Technical Context

This device implements a true synchronous SRAM core-not traditional dual-port-enabling deterministic timing with register-controlled address/data/control inputs. Each port features dedicated bank address pins (BA0–BA5), counter enable (CNTEN), repeat (REPEAT), and pipeline/flow-through mode selection (PL/FTL/R).

Full port independence includes separate clock domains, asynchronous OE, and dual CE0/CE1 logic per port. Bank conflict detection is user-managed: simultaneous access to identical banks by both ports invalidates both operations, requiring external arbitration logic or software coordination.

Key Specifications

Pinout & Package

70V7339S166BFG is housed in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208) with 0.8 mm ball pitch and 15 mm × 15 mm footprint. Power delivery requires 3.3 V core (VDD) and separately configurable I/O supplies (VDDQL/VDDQR) tied to OPTL/OPTR logic levels.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and IDT70V9369S166BG, the 70V7339S166BFG uniquely delivers 9 Mbit density in the compact 208-pin fpBGA while retaining per-port 2.5 V/3.3 V I/O configurability - critical for heterogeneous signal chain integration without voltage translation.

Availability

70V7339S166BFG is available at Aetrix Electronics and suitable for telecom switching fabric, real-time packet buffering, and industrial motion control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V7339S166BFG 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 70V7339S product line targets high-bandwidth, low-latency deterministic memory applications in telecom infrastructure and real-time embedded systems - emphasizing bank-switchable concurrency and flexible I/O voltage scaling.

FAQ

What is the maximum operating frequency of the 70V7339S166BFG at industrial temperature?

The 70V7339S166BFG is rated for 166 MHz operation across the full industrial temperature range (−40°C to +85°C). This corresponds to a maximum clock cycle time of 6 ns and pipelined access time of 3.6 ns. Note that this speed grade is not supported in the 208-pin fpBGA package at industrial temperature - however, the BFG suffix confirms this specific variant is qualified for 166 MHz industrial use per IDT documentation.

Can the left and right ports of the 70V7339S166BFG operate at different I/O voltages simultaneously?

Yes. The 70V7339S166BFG supports independent I/O voltage selection per port: OPTL sets VDDQL (left port), and OPTR sets VDDQR (right port). Setting OPTL = VIL and OPTR = VIH configures left port for 2.5 V signaling and right port for 3.3 V signaling - enabling direct interfacing with mixed-voltage SoCs or FPGAs without level shifters.

Does the 70V7339S166BFG support true dual-port concurrent access without arbitration logic?

The 70V7339S166BFG enables concurrent access only to *different* memory banks. If both ports assert identical BA0–BA5 values, the access is invalidated on both sides and data corruption may occur. Therefore, external arbitration or software-enforced bank separation is required - unlike legacy dual-ports with built-in busy logic, this device relies on user-managed bank addressing.

What is the function of the REPEAT pin on the 70V7339S166BFG?

The REPEAT pin (REPEATL/REPEATR) resets the internal address counter to the last valid address loaded via ADS (Address Strobe Enable). When asserted, it enables burst sequential access without host CPU intervention - for example, streaming video frames or sensor samples. The reset value is not power-on default and must be initialized via an ADS cycle during startup.

Is JTAG boundary-scan supported on the 70V7339S166BFG, and which standard does it comply with?

Yes, the 70V7339S166BFG fully supports IEEE 1149.1 JTAG boundary-scan. Pins TDI, TDO, TCK, TMS, and TRST are dedicated for this purpose and operate at the I/O voltage level selected by the corresponding OPT pin. This enables production testing, interconnect verification, and in-system debugging without requiring additional test fixtures.