Renesas 70V3389S6PRF

Overview

70V3389S6PRF from Integrated Device Technology is a high-speed 64K × 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 to the same memory location, delivers 4.2ns clock-to-data (pipelined), operates at 133MHz (7.5ns cycle time), and is used in real-time DSP inter-processor communication buffers and FPGA co-processor data exchange systems.

For engineers reviewing the 70V3389S6PRF datasheet, 70V3389S6PRF pinout, 70V3389S6PRF application, or 70V3389S6PRF equivalent, key selection criteria include its dual-chip-enable depth expansion capability, independent OPT-pin-controlled I/O voltage per port (3.3V or 2.5V), pipelined read latency, counter-enabled address auto-increment mode, and industrial-grade timing compliance at 6ns max tCD2.

Technical Context

The 70V3389S6PRF implements fully synchronous dual-port operation with all registers clocked on the rising edge of CLKL/CLKR. Its self-timed write pulse is independent of clock edge timing, enabling minimal cycle time. The device integrates separate address strobe (ADSL/ADSR) and counter control (CNTENL/CNTRSTL, CNTENR/CNTRSTR) logic for flexible burst addressing.

Each port features independent VDDQ power domains controlled by OPTL/OPTR pins, allowing mixed-voltage system interfacing - e.g., left port at 3.3V to a microcontroller and right port at 2.5V to an FPGA. Byte enables (UBL/LBL, UBR/LBR) support 9-bit granularity for multiplexed bus compatibility and partial writes without external logic.

Key Specifications

Pinout & Package

70V3389S6PRF is packaged in a 128-pin Thin Quad Plastic Flatpack (TQFP), body size 14 mm × 20 mm × 1.4 mm, with 0.5 mm lead pitch. All VDD pins require 3.3V ±150mV; VDDQ pins must match OPT pin state (3.3V if OPT = VIH, 2.5V 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 CY7C1375BV33-100AXC and AS7C361024B-12JIN, the 70V3389S6PRF uniquely combines pipelined timing, per-port voltage selection, and hardware address counting - reducing FPGA logic utilization and enabling tighter real-time deadlines in multi-processor systems.

Availability

70V3389S6PRF is available at Aetrix Electronics and suitable for telecom line card buffering, FPGA-based video frame storage, DSP co-processor shared memory, industrial motion controller data exchange, and real-time embedded instrumentation requiring stable component supply and long-term production continuity.

Supply support for 70V3389S6PRF 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 semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.

The 70V3389S6PRF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time inter-processor communication, burst-mode data acquisition, and FPGA co-processor memory bridging in bandwidth-constrained embedded systems.

FAQ

What is the maximum operating frequency supported by the 70V3389S6PRF?

The 70V3389S6PRF supports a maximum clock frequency of 83.3 MHz, derived from its 12 ns minimum clock cycle time (tCYC2) in pipelined mode. This is validated across the commercial temperature range (0°C to +70°C) with all timing parameters met under worst-case voltage and process corners. The device achieves 9.6 Gbps aggregate bandwidth (18 bits × 83.3 MHz × 2 ports).

How does the OPTL and OPTR pin configuration affect the 70V3389S6PRF I/O voltage levels?

For the 70V3389S6PRF, OPTL set to VIH (3.3V) configures the left port I/Os and controls for 3.3V operation, requiring VDDQL = 3.3V; OPTL at VIL (0V) selects 2.5V operation with VDDQL = 2.5V. OPTR operates identically for the right port. Both ports may be independently set - e.g., left at 3.3V for MCU interface and right at 2.5V for FPGA bank compatibility - with no shared constraints.

Can the 70V3389S6PRF perform simultaneous read and write operations on the same memory address?

Yes, the 70V3389S6PRF uses true dual-port memory cells that permit simultaneous read from one port and write to the same address on the other port. This is a core architectural feature confirmed in the functional block diagram and truth tables. No arbitration logic or external handshaking is required - the internal cell design guarantees data integrity during concurrent access.

What is the purpose of the ADSL and ADSR pins on the 70V3389S6PRF?

ADSL (Address Strobe Left) and ADSR (Address Strobe Right) are port-specific control inputs that determine whether the current address is loaded from external pins (ADSL/ADSR = LOW) or generated internally by the address counter (ADSL/ADSR = HIGH). When asserted low, they synchronize external address capture on the next rising clock edge; when high, they enable counter-driven sequential addressing - critical for burst DMA and circular buffer applications.

Does the 70V3389S6PRF support depth expansion, and how is it implemented?

Yes, the 70V3389S6PRF supports depth expansion using its dual chip enable signals (CE0L/CE1L and CE0R/CE1R). As shown in the datasheet's Truth Table I and Figure 4, pairing CE0 = LOW and CE1 = HIGH enables a device, while CE0 = HIGH or CE1 = LOW disables it. This allows stacking multiple 70V3389S6PRF units to increase memory depth (e.g., 128K × 18) without external address decoding logic.