Renesas 70V3389S5BF

Overview

70V3389S5BF from Integrated Device Technology is a high-speed 64K × 18-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous read/write access to the same memory location, 5 ns max clock-to-data access (industrial grade), and support for independent 3.3 V or 2.5 V I/O interfaces per port - used in real-time digital signal processing, FPGA co-processor buffering, and high-throughput packet switching systems.

For engineers reviewing the 70V3389S5BF datasheet, 70V3389S5BF pinout, 70V3389S5BF application, or 70V3389S5BF equivalent, key selection criteria include pipelined latency timing (tCD2 ≤ 5 ns), dual-voltage I/O flexibility (VDDQ = 2.5 V/3.3 V per port), industrial temperature operation (−40°C to +85°C), and depth-expansion capability via dual chip enables (CE0/CE1).

Technical Context

The 70V3389S5BF implements fully synchronous operation on both ports with all inputs registered on the rising edge of CLKL/CLKR, enabling 133 MHz operation (7.5 ns cycle time) and 9.6 Gbps aggregate bandwidth. Its self-timed write pulse decouples internal write timing from clock edge transitions, reducing setup/hold dependency.

It features independent address counters per port with ADS, CNTEN, and CNTRST control, allowing external address loading or automatic sequential addressing - critical for burst-mode FIFO emulation and DMA buffer management without external sequencers.

Key Specifications

Pinout & Package

70V3389S5BF is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208), body size ≈17 mm × 17 mm × 1.4 mm, 1.0 mm ball pitch. All VDD pins require 3.3 V supply; VDDQ pins must match OPT pin logic level (3.3 V if OPT = VIH, 2.5 V 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 CY7C1375BV33-5BC, the 70V3389S5BF offers per-port I/O voltage selection eliminating level shifters; compared with IDT70V3399S5BC, it provides pin-compatible density for cost-sensitive designs where 1 Mbit suffices and layout reuse is critical.

Availability

70V3389S5BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and FPGA-accelerated signal processing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3389S5BF 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, and RF power solutions for high-performance computing and communications systems.

The 70V3389S5BF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time, low-latency inter-processor and FPGA-to-ASIC memory sharing in telecom, test equipment, and industrial automation.

FAQ

What is the maximum operating frequency of the 70V3389S5BF?

The 70V3389S5BF supports a maximum operating frequency of 133 MHz, derived from its 7.5 ns minimum clock cycle time (tCYC2) in pipelined mode. This timing is guaranteed across the full industrial temperature range (−40°C to +85°C) and applies to both left and right ports independently when configured per datasheet AC conditions.

Does the 70V3389S5BF support independent I/O voltage levels on each port?

Yes, the 70V3389S5BF supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3 V) configures the left port for 3.3 V I/O operation with VDDQL = 3.3 V; setting OPTR to VIL (0 V) configures the right port for 2.5 V I/O operation with VDDQR = 2.5 V - enabling direct interfacing with mixed-voltage SoCs or FPGAs.

How does the address counter function in the 70V3389S5BF?

The 70V3389S5BF implements independent address counters on each port controlled by CNTEN and CNTRST. When CNTEN = VIL on the rising CLK edge, the counter advances automatically; CNTRST = VIL asynchronously resets the counter to address 0. ADS selects between external address (ADSL/ADSR = VIL) or internal counter value (ADSL/ADSR = VIH), enabling flexible burst and sequential access modes.

What package type is used for the 70V3389S5BF?

The 70V3389S5BF uses a 208-pin fine-pitch Ball Grid Array (fpBGA) package, designated BF208. Its dimensions are approximately 17 mm × 17 mm × 1.4 mm with a 1.0 mm ball pitch. The package supports standard reflow soldering and is compatible with automated assembly processes for high-reliability industrial PCBs.

Can the 70V3389S5BF be used for depth expansion without external logic?

Yes, the 70V3389S5BF supports depth expansion without external logic using its dual chip enables (CE0 and CE1 per port). For example, two devices can be stacked vertically: CE0L = LOW/CE1L = HIGH enables the first device's left port, while CE0L = HIGH/CE1L = LOW disables it - allowing simple address-space extension using only two control lines per port.