Renesas 70V7339S166BCI8

Overview

70V7339S166BCI8 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 range (–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 70V7339S166BCI8 datasheet, 70V7339S166BCI8 pinout, 70V7339S166BCI8 application, or 70V7339S166BCI8 equivalent, key selection criteria include bank-switchable arbitration, pipelined/flow-through output mode selection, JTAG IEEE 1149.1 compliance, dual chip enable depth expansion, and independent VDDQ voltage control per port.

Technical Context

The 70V7339S166BCI8 implements a true SRAM core-not traditional dual-port-enabling bank-switchable access across 64 independent 8K × 18 blocks. Each port uses dedicated address decode, bank decode, and I/O control logic, with bank selection via BA0–BA5 pins under user control.

It supports full synchronous operation on both ports with register-controlled inputs (1.5 ns setup / 0.5 ns hold @ 200 MHz), self-timed write for fast cycle time, and configurable pipeline/flow-through output mode via PL/FTL and PL/FTR pins. Counter enable (CNTEN) and repeat (REPEAT) features support burst address generation without external logic.

Key Specifications

Pinout & Package

70V7339S166BCI8 is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA), body size ≈15 mm × 15 mm × 1.4 mm, 0.8 mm ball pitch. Pin functions are symmetrically distributed across left (L) and right (R) ports, with dedicated bank address, clock, control, and 18-bit bidirectional I/O terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166AXC and AS7C35128P-166BIN, the 70V7339S166BCI8 uniquely delivers per-port voltage flexibility, hardware bank arbitration, and integrated JTAG - reducing BOM count and enabling deterministic real-time buffer management in compact fpBGA layouts.

Availability

70V7339S166BCI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, real-time signal processing, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V7339S166BCI8 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 memory subsystems in telecom switches, radar processors, and test instrumentation - emphasizing bank-switchable concurrency, mixed-voltage interoperability, and IEEE 1149.1 testability.

FAQ

What is the maximum operating frequency and access time for the 70V7339S166BCI8?

The 70V7339S166BCI8 is rated for 166 MHz operation with a maximum access time of 3.6 ns in pipelined mode. This specification applies across the full industrial temperature range (–40°C to +85°C) and is validated for both 3.3 V and 2.5 V I/O configurations. The device achieves this performance using registered inputs and optimized SRAM core timing.

Does the 70V7339S166BCI8 support independent voltage selection for each port's I/O interface?

Yes, the 70V7339S166BCI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIL configures the left port for 2.5 V operation (requiring VDDQL = 2.5 V), while OPTR = VIH configures the right port for 3.3 V operation (requiring VDDQR = 3.3 V). This enables mixed-voltage system integration without external level shifters.

How does bank-switchable arbitration work in the 70V7339S166BCI8, and what happens during bank conflicts?

The 70V7339S166BCI8 uses BA0–BA5 pins to select one of 64 independent 8K × 18 banks per port. If both ports attempt simultaneous access to the same bank, neither access is valid - writes may corrupt data and reads return invalid output. The architecture requires software or logic to ensure BA0L–BA5L ≠ BA0R–BA5R during concurrent operation.

What are the key differences between pipelined and flow-through output modes in the 70V7339S166BCI8?

In pipelined mode (PL/FTL = VIH), data appears at outputs after one clock cycle - providing deterministic latency and easing timing closure in high-frequency systems. In flow-through mode (PL/FTL = VIL), data appears combinatorially - enabling zero-cycle read-after-write but requiring stricter board-level timing control. Mode selection is asynchronous and per-port.

Is JTAG boundary-scan supported on the 70V7339S166BCI8, and which standard does it comply with?

Yes, the 70V7339S166BCI8 includes full IEEE 1149.1-compliant JTAG boundary-scan functionality via dedicated TMS, TCK, TDI, TDO, and TRST pins. This enables production test, in-circuit debugging, and interconnect verification without requiring physical probe access - critical for high-density BGA-based designs.