Renesas 70V3389S4BF

Overview

70V3389S4BF 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, 4.2 ns clock-to-data access (max), 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 70V3389S4BF datasheet, 70V3389S4BF pinout, 70V3389S4BF application, or 70V3389S4BF equivalent, key selection criteria include pipelined latency timing, dual-voltage I/O flexibility (3.3 V/2.5 V per port), counter-enable address generation, depth-expansion chip enables, and industrial-grade thermal operation up to +85°C.

Technical Context

The 70V3389S4BF implements fully synchronous dual-port operation on both left and right ports, with all control, address, and data inputs registered on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write completion from clock edge timing, enabling minimal cycle time.

It features independent address counters per port controlled by CNTENL/CNTRSTL and CNTENR/CNTRSTR, with ADSL/ADSR enabling external address latching. OPTL/OPTR pins configure VDDQL/VDDQR supply voltage (3.3 V or 2.5 V) independently per port, while UBL/LBL and UBR/LBR provide 9-bit byte-level write enable granularity.

Key Specifications

Pinout & Package

70V3389S4BF is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208), measuring approximately 17 mm × 17 mm × 1.4 mm with 1.0 mm ball pitch. All VDD pins require 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic level (3.3 V if VIH, 2.5 V if 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 CY7C1372BV25-167AXC and AS7C3616A-15JIN, the 70V3389S4BF uniquely delivers per-port I/O voltage configurability, pipelined 4.2 ns access, and integrated address counters - making it the only option suitable for mixed-voltage, high-throughput, low-jitter embedded buffering.

Availability

70V3389S4BF is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA-based accelerators, and industrial motion control systems requiring stable component supply across extended production lifecycles.

Supply support for 70V3389S4BF 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 ICs for communications, computing, and industrial markets.

The 70V3389S4BF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between parallel processing elements in real-time systems.

FAQ

What is the maximum operating frequency of the 70V3389S4BF?

The 70V3389S4BF supports a 133 MHz clock rate with a 7.5 ns minimum clock cycle time (tCYC2) in pipelined mode. This is validated across the commercial temperature range (0°C to +70°C) and corresponds to the "4" speed grade in its ordering code. It achieves 9.6 Gbps aggregate bandwidth across both ports under sustained burst conditions.

Does the 70V3389S4BF support independent voltage operation on its left and right ports?

Yes, the 70V3389S4BF 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 levels with VDDQL = 3.3 V; setting OPTR to VIL (0 V) configures the right port for 2.5 V I/O with VDDQR = 2.5 V. This enables direct interfacing with mixed-voltage FPGAs or ASICs without external level shifters.

How does the address counter function in the 70V3389S4BF?

The 70V3389S4BF integrates independent 16-bit address counters for each port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTEN = VIL on the rising CLK edge, the counter increments automatically - enabling sequential burst access without external address generation logic. CNTRST resets the counter to address 0, supporting circular buffer or ping-pong memory schemes.

What package type is used for the 70V3389S4BF?

The 70V3389S4BF 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. This package provides high I/O density and thermal performance suitable for compact, high-speed PCB layouts in telecom and industrial equipment.

Can the 70V3389S4BF be used for depth expansion without external logic?

Yes, the 70V3389S4BF supports depth expansion using its dual chip enables (CE0L/CE1L and CE0R/CE1R) without external decoding logic. By tying CE0 of one device LOW and CE1 HIGH while reversing the state for the adjacent device, two or more 70V3389S4BF units can be stacked to increase memory depth - maintaining full 18-bit width and synchronous timing across the bank.