Renesas 70V3389S4PRF8

Overview

70V3389S4PRF8 from Integrated Device Technology is a high-speed 64K × 18-bit synchronous dual-port static RAM with pipelined output, 3.3V core supply, and independently configurable 3.3V/2.5V I/O interfaces per port. It supports simultaneous read/write access to the same memory location, delivers 133 MHz operation (7.5 ns cycle time), and features address counter enable/reset for burst-mode addressing in telecom and packet buffer applications.

For engineers reviewing the 70V3389S4PRF8 datasheet, 70V3389S4PRF8 pinout, 70V3389S4PRF8 application, or 70V3389S4PRF8 equivalent, this page provides verified timing parameters, dual-port I/O voltage configuration logic, pipelined read latency behavior, and industrial-temperature-compatible alternatives for real-time embedded memory subsystems.

Technical Context

The 70V3389S4PRF8 implements true dual-port SRAM cells with fully synchronous register-controlled inputs on both ports, enabling deterministic setup/hold timing at 133 MHz. Its pipelined output mode introduces one-clock-cycle data delay, while self-timed write logic decouples internal write pulse generation from clock edge timing.

Each port has independent OPT pins (OPTL/OPTR) that configure VDDQX supply voltage (3.3V or 2.5V), allowing mixed-voltage system interfacing - e.g., left port at 2.5V for FPGA I/O banks and right port at 3.3V for microcontroller buses - without level shifters.

Key Specifications

Pinout & Package

70V3389S4PRF8 is packaged in a 128-pin Thin Quad Flat Package (TQFP), body size 14 mm × 20 mm × 1.4 mm, with 0.5 mm lead pitch. Pin functions are symmetrically distributed across left/right ports to support balanced PCB layout for dual-bus systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133AXC and AS7C362000B-133JCIN, the 70V3389S4PRF8 uniquely balances commercial-grade speed, per-port I/O voltage configurability, and minimal footprint - making it optimal for space-constrained, mixed-voltage embedded systems where 64K × 18 suffices.

Availability

70V3389S4PRF8 is available at Aetrix Electronics and suitable for telecom packet buffering, real-time DSP co-processing, industrial motion control, test equipment pattern memory, and FPGA-based protocol accelerators requiring stable component supply across production lifecycles.

Supply support for 70V3389S4PRF8 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 70V3389S4PRF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between asynchronous processing elements in networking and real-time control systems.

FAQ

What is the maximum operating frequency of the 70V3389S4PRF8?

The 70V3389S4PRF8 supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns minimum clock cycle time (tCYC2). This rating applies across the commercial temperature range (0°C to +70°C) with VDD = 3.3V ±150 mV and valid I/O supply conditions. The device achieves this speed using pipelined output architecture and registered inputs for minimal setup/hold timing margins.

Does the 70V3389S4PRF8 support mixed-voltage operation between its two ports?

Yes, the 70V3389S4PRF8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH (3.3V) configures the left port for 3.3V I/O levels with VDDQL = 3.3V, while setting OPTR to VIL (0V) configures the right port for 2.5V I/O levels with VDDQR = 2.5V. This enables direct interfacing with heterogeneous logic families without external level shifters.

How does the address counter function work on the 70V3389S4PRF8?

The 70V3389S4PRF8 implements an internal 16-bit address counter per port, controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTENX = VIL on the rising CLK edge, the counter advances automatically; when CNTRSTX = VIL, it resets to address 0 on the next CLK edge. ADSX = VIH enables counter-driven addressing, eliminating software address increment overhead in burst transfers.

What package type is used for the 70V3389S4PRF8?

The 70V3389S4PRF8 is supplied in a 128-pin Thin Quad Flat Package (TQFP), designated PKG128, with dimensions of 14 mm × 20 mm × 1.4 mm and 0.5 mm lead pitch. This RoHS-compliant package supports reflow soldering and provides symmetric pin distribution for balanced signal routing in dual-bus memory subsystems.

Is the 70V3389S4PRF8 suitable for industrial temperature applications?

No, the 70V3389S4PRF8 is rated exclusively for commercial temperature operation (0°C to +70°C). For industrial temperature range (-40°C to +85°C), engineers should select the 70V3389S5 variant (e.g., 70V3389S5BCGI), which shares identical functionality and pinout but is characterized and qualified across the extended thermal range.