Renesas 70V3379S4BF

Overview

70V3379S4BF 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 70V3379S4BF datasheet, 70V3379S4BF pinout, 70V3379S4BF application, or 70V3379S4BF equivalent, key selection criteria include pipelined read latency, independent port voltage configuration via OPTL/OPTR, counter-enable address sequencing, and dual chip enable support for depth expansion without external logic.

Technical Context

The 70V3379S4BF implements fully synchronous 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 timing from clock edge transitions, enabling minimal cycle time while maintaining setup/hold margins.

Each port features independent power domains: VDD (3.3 V core) and VDDQ (3.3 V or 2.5 V I/O), selected per port by OPTL/OPTR pins. The device includes dedicated address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and counter reset (CNTRSTL/CNTRSTR) signals to support burst-mode sequential access without external address generation.

Key Specifications

Pinout & Package

70V3379S4BF is packaged in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208) with 1.0 mm ball pitch and 17 mm × 17 mm body size. 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 CY7C1375BV33-167AXC and AS7C3316B-15JIN, the 70V3379S4BF provides unique value through its per-port I/O voltage configurability, integrated address counter, and pipelined synchronous interface-enabling simpler, more robust system architectures in telecom and industrial control.

Availability

70V3379S4BF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, real-time DSP subsystems, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 70V3379S4BF 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 70V3379S4BF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic, low-latency shared memory in real-time signal processing and packet-forwarding systems.

FAQ

What is the maximum operating frequency of the 70V3379S4BF?

The 70V3379S4BF 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 guaranteed under recommended DC operating conditions with VDD = 3.3 V ± 150 mV. The device achieves this performance using pipelined output architecture and registered inputs.

How does the 70V3379S4BF handle mixed-voltage interfacing between its two ports?

The 70V3379S4BF supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3 V signaling (requiring VDDQL = 3.3 V), while OPTL = VIL configures it for 2.5 V (VDDQL = 2.5 V); OPTR controls the right port identically. This allows one port to interface with a 3.3 V controller and the other with a 2.5 V FPGA I/O bank without external level shifters.

Does the 70V3379S4BF support automatic sequential addressing?

Yes, the 70V3379S4BF includes dedicated counter enable (CNTENL/CNTENR) and counter reset (CNTRSTL/CNTRSTR) inputs that control an internal 15-bit address counter. When CNTENX = VIL on the rising edge of CLKX, the counter advances automatically-enabling burst-mode sequential access without external address generation logic. ADSX can be held high to use counter output exclusively.

What package type is used for the 70V3379S4BF?

The 70V3379S4BF uses a 208-pin fine-pitch Ball Grid Array (fpBGA) package, designated BF208. Its mechanical dimensions are approximately 17 mm × 17 mm × 1.4 mm with a 1.0 mm ball pitch. This package supports high-density PCB layouts and provides low-inductance power delivery essential for high-speed SRAM operation.

Can the 70V3379S4BF be used in depth-expansion configurations without additional logic?

Yes, the 70V3379S4BF features dual chip enables (CE0X and CE1X) per port, enabling straightforward depth expansion. For example, two devices can be stacked using shared address, data, and clock lines, with CE0L/CE1L controlling the first device and CE0R/CE1R controlling the second-no external decoding logic is required. Truth Table I in the datasheet defines the exact enable conditions.