Renesas 70V3379S5BF

Overview

70V3379S5BF from Integrated Device Technology is a high-speed 32K × 18-bit synchronous dual-port static RAM with pipelined output, true dual-port architecture enabling simultaneous access to the same memory location, 7.5 ns clock cycle time (133 MHz), and selectable 3.3 V or 2.5 V I/O interface per port. It supports industrial temperature range (–40°C to +85°C) and is used in real-time packet buffering for telecom line cards.

For engineers reviewing the 70V3379S5BF datasheet, 70V3379S5BF pinout, 70V3379S5BF application, or 70V3379S5BF equivalent, key selection criteria include pipelined read latency, independent port voltage configuration via OPTL/OPTR, counter-enabled burst addressing, and dual chip enable support for depth expansion without external logic.

Technical Context

The 70V3379S5BF implements fully synchronous operation on both left and right ports, with all registers clocked on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write timing from clock edge transitions, enabling minimal cycle time while maintaining data integrity.

Each port features independent address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and counter reset (CNTRSTL/CNTRSTR) signals, allowing autonomous address generation or external address loading. Byte enables (UBL/LBL and UBR/LBR) provide 9-bit granularity per port, supporting multiplexed bus interfacing and mixed-width system integration.

Key Specifications

Pinout & Package

70V3379S5BF is housed in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208) with 17 mm × 17 mm footprint and 1.0 mm ball pitch. All VDD pins require 3.3 V supply; VDDQ pins must match selected I/O voltage (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 CY7C1375BV33-167AXC and AS7C33256P-15JIN, the 70V3379S5BF uniquely delivers industrial-temperature-rated pipelined operation with per-port I/O voltage selection and integrated address counter-enabling lower-system-complexity designs in telecom and embedded control.

Availability

70V3379S5BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and test equipment applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V3379S5BF 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 power solutions for communications and computing markets.

The 70V3379S5BF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor and packet-buffering applications in telecom, military, and industrial systems.

FAQ

What is the maximum operating frequency of the 70V3379S5BF?

The 70V3379S5BF supports a 133 MHz maximum operating frequency, derived from its 7.5 ns clock cycle time (tCYC2). This specification applies across the full industrial temperature range (–40°C to +85°C) and is validated for both pipelined read and write operations. The device achieves this performance using registered inputs and self-timed write architecture, ensuring timing margin in high-speed designs.

Does the 70V3379S5BF support independent voltage operation on each port?

Yes, the 70V3379S5BF 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 operation (requiring VDDQL = 3.3 V), while setting OPTR to VIL configures the right port for 2.5 V I/O (requiring VDDQR = 2.5 V). This enables direct interfacing with mixed-voltage ASICs or FPGAs without external level shifters.

How does the address counter function in the 70V3379S5BF?

The 70V3379S5BF integrates a 15-bit address counter per port, controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising clock edge, the counter advances automatically-bypassing ADS-driven external address loading. This enables burst-mode sequential access for applications like FFT coefficient lookup or video line buffering, reducing address bus traffic and controller overhead.

What package type is used for the 70V3379S5BF?

The 70V3379S5BF is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA) with package code BF208. The body measures approximately 17 mm × 17 mm × 1.4 mm with a 1.0 mm ball pitch. This package supports high I/O density and thermal performance required for sustained 133 MHz operation in compact telecom and industrial modules.

Can the 70V3379S5BF be used for depth expansion without external logic?

Yes, the 70V3379S5BF features dual chip enables per port (CE0L/CE1L and CE0R/CE1R), enabling direct depth expansion of multiple devices without additional decode logic. For example, two 70V3379S5BFs can be configured as a 64K × 18 memory by tying their address and data buses in parallel and using complementary CE0/CE1 states to select active devices-reducing BOM count and PCB routing complexity.