Renesas 70V3389S6BF8

Overview

70V3389S6BF8 from Integrated Device Technology is a high-speed 64K × 18-bit synchronous dual-port static RAM with pipelined output, 3.3V core supply, and selectable 3.3V/2.5V I/O interface per port. It supports simultaneous independent access on left and right ports, delivers 133MHz operation (7.5ns cycle time), and enables burst-mode data transfer in telecom switching, video frame buffers, and real-time DSP systems.

For engineers reviewing the 70V3389S6BF8 datasheet, 70V3389S6BF8 pinout, 70V3389S6BF8 application, or 70V3389S6BF8 equivalent, key selection criteria include pipelined clock-to-data timing (≤6ns), dual-voltage I/O flexibility (OPTL/OPTR-controlled), counter-enable/reset functionality for address sequencing, and industrial-grade thermal stability (-40°C to +85°C) in the 208-pin fpBGA package.

Technical Context

The 70V3389S6BF8 implements fully synchronous dual-port architecture with registered address, data, and control inputs clocked on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write latency from clock edge timing, enabling consistent 7.5ns cycle time at 133MHz while maintaining 1.8ns setup and 0.7ns hold margins on all inputs.

Each port features independent chip enables (CE0X/CE1X), byte enables (UBL/LBL, UBR/LBR), address strobe (ADSL/ADSR), and counter control (CNTENX/CNTRSTX). The OPTL/OPTR pins configure VDDQL/VDDQR to 3.3V or 2.5V, allowing mixed-voltage system interfacing without level shifters.

Key Specifications

Pinout & Package

70V3389S6BF8 is housed in a 208-pin fine-pitch Ball Grid Array (fpBGA) with 1.0 mm ball pitch and 17 mm × 17 mm body size. All VDD pins require 3.3V; VDDQL/VDDQR must match OPTL/OPTR voltage selection (3.3V if OPT = VIH, 2.5V if OPT = VIL); all VSS pins connect to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375BV33-167AXC and AS7C361024B-10BIN, the 70V3389S6BF8 uniquely combines pipelined determinism, per-port I/O voltage selection, and hardware address counting - reducing BOM count and PCB area in mixed-signal, multi-chip systems requiring precise timing and voltage domain bridging.

Availability

70V3389S6BF8 is available at Aetrix Electronics and suitable for telecom switching infrastructure, broadcast video processing, DSP acceleration modules, and industrial motion controllers requiring stable component supply across extended product lifecycles.

Supply support for 70V3389S6BF8 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, specializes in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 70V3389S6BF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic, low-latency memory access in real-time signal processing, packet buffering, and multi-processor coherency applications.

FAQ

What is the maximum operating frequency of the 70V3389S6BF8?

The 70V3389S6BF8 supports a minimum clock cycle time of 7.5 ns, enabling reliable operation at 133 MHz. This is validated across the commercial and industrial temperature ranges with VDD = 3.3V ±150 mV and appropriate VDDQ selection. The 70V3389S6BF8 achieves this performance using pipelined output architecture and registered inputs that reduce setup/hold timing constraints.

How does the OPTL and OPTR pin configuration affect I/O voltage operation for the 70V3389S6BF8?

For the 70V3389S6BF8, OPTL = VIH (≥2.0V) configures the left port for 3.3V I/O operation (requiring VDDQL = 3.3V), while OPTL = VIL (≤0.8V) configures it for 2.5V operation (requiring VDDQL = 2.5V); OPTR operates identically for the right port. This allows independent voltage domain assignment - e.g., interfacing a 2.5V FPGA on the right port and a 3.3V microcontroller on the left port - without external level shifters.

Does the 70V3389S6BF8 support true simultaneous read/write on the same memory location?

Yes, the 70V3389S6BF8 uses true dual-port memory cells that permit simultaneous, independent read and write operations to the exact same address location - one port reading while the other writes. This capability is fundamental to its use in lock-free inter-processor communication, ping-pong buffering, and real-time data exchange where atomicity and zero arbitration delay are required.

What is the function of the CNTRSTL and CNTRSTR pins on the 70V3389S6BF8?

CNTRSTL and CNTRSTR are asynchronous reset inputs for the left and right port address counters, respectively. When asserted (LOW), they immediately force the internal counter to zero - enabling deterministic initialization of burst transfers. This is especially valuable in video frame buffers or packet engines where sequences must begin at address 0 without CPU intervention or clock-cycle delay.

Can the 70V3389S6BF8 be used in depth-expansion configurations without external logic?

Yes, the 70V3389S6BF8 integrates dual chip enables (CE0X and CE1X) per port specifically to simplify depth expansion. By tying CE0 and CE1 of adjacent devices to complementary address bits (e.g., A16), multiple 70V3389S6BF8 units can be stacked to increase memory depth - such as building a 128K × 18 configuration - without requiring external decoders or glue logic, reducing design complexity and board space.