Renesas 70V3389S4PRF

Overview

70V3389S4PRF from Integrated Device Technology is a high-speed 64K × 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 - deployed in real-time digital signal processing, video frame buffering, and network packet switching systems.

For engineers reviewing the 70V3389S4PRF datasheet, 70V3389S4PRF pinout, 70V3389S4PRF application, or 70V3389S4PRF equivalent, this page delivers verified timing parameters, validated dual-port counter control behavior, confirmed TQFP-128 package mapping, and precise voltage domain separation between core (3.3 V) and I/O (3.3 V/2.5 V) supplies.

Technical Context

The 70V3389S4PRF 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 operates independently of clock transitions, enabling minimal cycle time without external timing constraints.

It supports pipelined read mode with 4.2 ns clock-to-data-out (max), 1.8 ns address setup, and 0.7 ns hold times at 133 MHz. Address strobe (ADSL/ADSR) and independent counter enable/reset (CNTENL/CNTRSTL, CNTENR/CNTRSTR) allow flexible burst addressing and deterministic address sequencing without CPU intervention.

Key Specifications

Pinout & Package

70V3389S4PRF 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 3.3 V supply; VDDQL/VDDQR must match OPTL/OPTR logic level (3.3 V if VIH, 2.5 V if 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 CY7C1362BV33-133AXC and AS7C362000B-133BIN, the 70V3389S4PRF uniquely combines selectable I/O voltage per port, integrated address counter, and asynchronous OE - making it the only option supporting mixed-voltage burst buffering with zero-cycle address increment in space-constrained industrial controllers.

Availability

70V3389S4PRF is available at Aetrix Electronics and suitable for video frame buffering, network packet switching, digital signal processing, industrial motion control, and real-time embedded systems requiring stable component supply across commercial temperature range.

Supply support for 70V3389S4PRF 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 70V3389S4PRF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between heterogeneous processors and ASICs in real-time systems.

FAQ

What is the maximum operating frequency of the 70V3389S4PRF?

The 70V3389S4PRF supports a minimum clock cycle time of 7.5 ns, corresponding to a maximum operating frequency of 133 MHz. This is guaranteed across the commercial temperature range (0°C to +70°C) with VDD = 3.3 V ±150 mV and proper termination. The device achieves 9.6 Gbps aggregate bandwidth across both ports under pipelined read conditions.

Does the 70V3389S4PRF support mixed-voltage operation between its two ports?

Yes, the 70V3389S4PRF supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH (3.3 V) configures the left port for 3.3 V I/O levels with VDDQL = 3.3 V; setting OPTR = VIL (0 V) configures the right port for 2.5 V I/O levels with VDDQR = 2.5 V. This enables direct interfacing with 3.3 V FPGAs and 2.5 V ASICs on the same board.

How does the address counter function work on the 70V3389S4PRF?

The 70V3389S4PRF integrates independent 16-bit address counters on each port. When CNTENL = LOW, the left port's internal address increments automatically on each CLKL rising edge - eliminating need for external address generation. CNTRSTL = LOW resets the counter to address 0x0000. ADSL = HIGH disables external address loading, forcing use of counter output - ideal for sequential burst transfers in DSP kernels.

What power-saving features does the 70V3389S4PRF offer?

The 70V3389S4PRF provides multiple power-saving modes: full standby (ISB3 = 6–15 mA) when both CE0 and CE1 are held at CMOS-inactive levels; port-specific standby (ISB2 = 175–325 mA) when one port is enabled and the other disabled; and automatic self-timed write reduces active power by minimizing internal pulse duration. These features reduce thermal load in fanless industrial enclosures.

Can the 70V3389S4PRF be used for depth expansion without external logic?

Yes, the 70V3389S4PRF supports depth expansion using its dual chip enable inputs (CE0L/CE1L and CE0R/CE1R). For two-device depth expansion, tie CE0L of Device 1 to CE1L of Device 2, and vice versa - enabling alternating activation without additional gates. This configuration is explicitly validated in IDT Application Note 4832 and used in telecom line card reference designs.