Renesas 70V3389S5BC

Overview

70V3389S5BC 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 left/right port access to the same memory location, 7.5 ns cycle time at 133 MHz, and selectable 3.3 V or 2.5 V I/O interface per port - used in real-time digital signal processing, FPGA co-processor buffering, and high-throughput packet switching systems.

For engineers reviewing the 70V3389S5BC datasheet, 70V3389S5BC pinout, 70V3389S5BC application, or 70V3389S5BC equivalent, this page delivers verified timing parameters, validated package mapping (256-pin BGA, BCG256), confirmed dual-voltage I/O operation, industrial temperature support (–40°C to +85°C), and functional alternatives for depth/width expansion designs.

Technical Context

The 70V3389S5BC implements fully synchronous dual-port operation with clocked address, data, and control registers on both ports, supporting pipelined read/write cycles with 1-cycle latency. Its self-timed write pulse decouples internal write timing from clock edge transitions, enabling consistent 4.2 ns clock-to-data-out (max) across speed grades.

Each port features independent chip enables (CE0X/CE1X), byte enables (UBX/LBX), address strobe (ADSX), counter enable (CNTENX), and counter reset (CNTRSTX), allowing flexible burst addressing, interleaved memory access, and automatic power-down modes without external logic.

Key Specifications

Pinout & Package

70V3389S5BC is packaged in a 256-pin Ball Grid Array (BCG256), 17 mm × 17 mm body, 1.0 mm ball pitch, with dedicated VDD (3.3 V core), VDDQ (port-selectable I/O), VSS, and dual-port signal groups arranged for signal integrity and layout symmetry.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375BV33-5BC and AS7C364098B-10BIN, the 70V3389S5BC uniquely delivers per-port 2.5 V/3.3 V I/O flexibility, 7.5 ns cycle time, and integrated address counter - making it optimal for heterogeneous voltage systems requiring maximum burst bandwidth and minimal external logic.

Availability

70V3389S5BC is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and avionics data acquisition requiring stable component supply, long-term lifecycle assurance, and industrial-grade thermal performance.

Supply support for 70V3389S5BC 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, RF, and power management ICs for communications, computing, and industrial markets.

The 70V3389S5BC belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time systems demanding deterministic latency, concurrent multi-port access, and robust mixed-voltage interoperability.

FAQ

What is the maximum operating frequency of the 70V3389S5BC?

The 70V3389S5BC supports a minimum clock cycle time of 7.5 ns, enabling reliable operation at 133 MHz. This is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both ports simultaneously in pipelined mode. The device achieves this using registered inputs and self-timed internal write pulses, ensuring timing margin even under marginal signal integrity conditions.

Does the 70V3389S5BC support mixed-voltage operation between its two ports?

Yes, the 70V3389S5BC supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH configures the left port for 3.3 V I/O levels (requiring VDDQL = 3.3 V), while setting OPTR to VIL configures the right port for 2.5 V I/O levels (requiring VDDQR = 2.5 V). This allows direct interfacing with heterogeneous logic families without external level shifters.

How does the address counter function in the 70V3389S5BC?

The 70V3389S5BC integrates independent 16-bit address counters on each port, controlled by CNTENX and CNTRSTX. When CNTENX = LOW on the rising CLK edge, the counter advances automatically - eliminating need for external address generation logic during burst transfers. ADSX = HIGH blocks external address loading, forcing use of the counter output. This feature is widely used in DMA engines and video frame buffers.

What power-saving modes does the 70V3389S5BC offer?

The 70V3389S5BC provides multiple power-saving modes: full standby (ISB3 = 6 mA typ) when both CE0X > VDDQ–0.2 V and CE1X < 0.2 V; partial standby (ISB2 = 190 mA typ) when one port is active and the other disabled; and dynamic power reduction via self-timed write. These modes are controllable per port, enabling granular power management in multi-function systems.

Is the 70V3389S5BC pin-compatible with other members of the IDT70V33xx family?

The 70V3389S5BC shares identical pinouts with other speed grades (e.g., 70V3389S4BC, 70V3389S6BC) and density variants in the same package (e.g., 70V3379S5BC for 32K × 18), enabling drop-in upgrades. However, it is not pin-compatible with higher-density parts like 70V3399 (128K × 18) due to additional address pins - always verify package drawings and pin configuration tables before substitution.