Renesas 70V3379S5PRFI8

Overview

70V3379S5PRFI8 from Integrated Device Technology is a high-speed 32K × 18-bit synchronous dual-port static RAM with pipelined output, 3.3V core supply, and selectable 3.3V/2.5V I/O interface per port. It supports simultaneous left/right port access, 133MHz operation (7.5ns cycle time), and industrial temperature range (–40°C to +85°C). Used in real-time packet buffering, FPGA co-processor memory, and telecom line card data exchange.

For engineers reviewing the 70V3379S5PRFI8 datasheet, 70V3379S5PRFI8 pinout, 70V3379S5PRFI8 application, or 70V3379S5PRFI8 equivalent, key selection factors include pipelined read latency (4.2ns max), independent port voltage configuration via OPTL/OPTR, counter-enable address sequencing, dual chip enables for depth expansion, and 256-pin BGA package compatibility with thermal and signal integrity constraints.

Technical Context

The 70V3379S5PRFI8 implements true dual-port SRAM cells with fully synchronous register-controlled inputs on both ports-address, data, and control signals are latched on the rising edge of CLKL/CLKR. Its pipelined output mode introduces one-cycle latency between clock and valid data, enabling deterministic timing at 133MHz.

Each port features independent VDDQ supply (3.3V or 2.5V) selected by OPTL/OPTR pins, separate byte enables (UBL/LBL and UBR/LBR) for 9-bit granularity, and asynchronous OE for flexible bus interfacing. Address counter logic (CNTENL/CNTRSTL and CNTENR/CNTRSTR) allows autonomous sequential access without external address generation.

Key Specifications

Pinout & Package

70V3379S5PRFI8 is housed in a 256-pin fine-pitch BGA (BC256/BCG256) with 17 mm × 17 mm footprint and 1.0 mm ball pitch. Power and ground balls are distributed across the array for low-impedance supply delivery and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375BV25-5BC and AS7C33256B-10JIN, the 70V3379S5PRFI8 uniquely delivers industrial-grade 133MHz pipelined operation with per-port I/O voltage flexibility and integrated address sequencing-critical for FPGA-ASIC co-processing and telecom infrastructure where timing predictability and voltage interoperability are non-negotiable.

Availability

70V3379S5PRFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and FPGA-based embedded systems requiring stable component supply across extended product lifecycles.

Supply support for 70V3379S5PRFI8 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 solutions for communications, computing, and industrial markets.

The 70V3379S5PRFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for real-time, low-latency inter-processor communication and burst-mode buffering in telecom, test equipment, and embedded control systems.

FAQ

What is the maximum operating frequency of the 70V3379S5PRFI8?

The 70V3379S5PRFI8 supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns minimum clock cycle time in pipelined mode. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and applies to both left and right ports independently. The device achieves this performance using registered inputs and self-timed write circuitry, ensuring timing compliance without external delay compensation.

Does the 70V3379S5PRFI8 support mixed-voltage operation between its two ports?

Yes, the 70V3379S5PRFI8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH configures the left port for 3.3V I/O signaling (requiring VDDQL = 3.3V), while setting OPTR to VIL configures the right port for 2.5V I/O (requiring VDDQR = 2.5V). This enables direct interfacing with heterogeneous logic families-such as connecting a 3.3V FPGA to a 2.5V ASIC-without external level shifters.

How does the address counter function in the 70V3379S5PRFI8?

The 70V3379S5PRFI8 integrates a 15-bit address counter per port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTENX is asserted low on the rising clock edge, the counter advances automatically-bypassing the external address bus. CNTRSTX resets the counter to address 0. This feature enables burst-mode sequential access (e.g., FIFO-like behavior) without consuming FPGA or processor resources for address generation, reducing system latency and logic utilization.

What package type is used for the 70V3379S5PRFI8 and what are its mechanical dimensions?

70V3379S5PRFI8 is packaged in a 256-pin fine-pitch Ball Grid Array (BC256/BCG256) with a 17 mm × 17 mm body size and 1.0 mm ball pitch. The package complies with JEDEC MO-270AB standards and features perimeter and array power/ground ball distribution to minimize simultaneous switching noise. Thermal resistance (θJA) is 26°C/W, supporting operation up to +85°C ambient with standard 4-layer PCB layout practices.

Can the 70V3379S5PRFI8 be used in depth-expansion configurations without external logic?

Yes, the 70V3379S5PRFI8 supports depth expansion using only its dual chip enables (CE0X and CE1X per port)-no external decoding logic is required. For example, two devices can be stacked by tying CE0L of Device 1 to CE1L of Device 2 and vice versa, with shared address and data buses. This configuration allows seamless 64K × 18 memory expansion while preserving full dual-port functionality and pipelined timing across both devices.