Renesas 70V3389S4BF8

Overview

70V3389S4BF8 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 4.2ns clock-to-data (pipelined), and operates at 133MHz (7.5ns cycle time) for 9.6 Gbps aggregate bandwidth - used in real-time digital signal processing, FPGA co-processor buffering, and high-throughput packet switching.

For engineers reviewing the 70V3389S4BF8 datasheet, 70V3389S4BF8 pinout, 70V3389S4BF8 application, or 70V3389S4BF8 equivalent, key selection criteria include true dual-port concurrency, independent voltage-selectable I/O ports (via OPTL/OPTR), pipelined latency control, counter-enable/reset for burst address generation, and industrial-grade (-40°C to +85°C) operation in the BF208 208-pin fpBGA package.

Technical Context

The 70V3389S4BF8 implements fully synchronous dual-port architecture with edge-triggered registers on all address, data, and control inputs (CLKL/CLKR rising edge), enabling minimal setup/hold times (1.8ns setup, 0.7ns hold @ 133MHz). Its self-timed write pulse decouples internal write timing from clock edge transitions, preserving fast cycle integrity.

Each port features independent VDDQ selection (3.3V or 2.5V) via dedicated OPTL/OPTR pins, allowing mixed-voltage system interfacing - e.g., left port at 3.3V to an FPGA I/O bank, right port at 2.5V to a legacy ASIC. The integrated 18-bit address counter (CNTENL/CNTRSTL and CNTENR/CNTRSTR) enables automatic sequential addressing without external logic.

Key Specifications

Pinout & Package

70V3389S4BF8 is housed in a 208-pin fine-pitch Ball Grid Array (fpBGA, package code BF208), measuring 17 mm × 17 mm × 1.4 mm with 1.0 mm ball pitch. All VDD pins require 3.3V; VDDQL/VDDQR must match OPTL/OPTR logic state (3.3V if VIH, 2.5V 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 CY7C1375BV33-167AXC and AS7C362000B-15JIN, the 70V3389S4BF8 uniquely balances 64K depth, 133 MHz pipelined throughput, and per-port I/O voltage configurability - making it optimal for mixed-voltage, timing-critical embedded systems where layout area and BOM count must be minimized.

Availability

70V3389S4BF8 is available at Aetrix Electronics and suitable for FPGA co-processor buffering, real-time DSP memory, and telecom packet switching applications requiring stable component supply, long-term lifecycle support, and industrial temperature compliance.

Supply support for 70V3389S4BF8 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 fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions for communications, computing, and industrial markets.

The 70V3389S4BF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic latency, concurrent access, and mixed-voltage interoperability in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V3389S4BF8?

The 70V3389S4BF8 supports a maximum clock frequency of 133 MHz, corresponding to a 7.5 ns minimum clock cycle time in pipelined mode. This is validated across the commercial temperature range (0°C to +70°C) and confirmed in the AC Electrical Characteristics table (tCYC2 = 7.5 ns max). At this rate, the device delivers 9.6 Gbps aggregate bandwidth across both ports.

Does the 70V3389S4BF8 support independent I/O voltage levels on each port?

Yes, the 70V3389S4BF8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL = VIH configures the left port for 3.3V I/O operation (requiring VDDQL = 3.3V), while OPTL = VIL configures it for 2.5V (requiring VDDQL = 2.5V); the same applies independently to the right port using OPTR and VDDQR.

What is the function of the ADSL and ADSR pins on the 70V3389S4BF8?

ADSL (Address Strobe Left) and ADSR (Address Strobe Right) are synchronous address latch enable inputs. When asserted (VIL), they cause the respective port to load the current address bus value on the next rising clock edge - enabling external address generation while retaining internal counter functionality. They operate independently of CNTEN and CNTRST signals.

Can the 70V3389S4BF8 be used in industrial temperature applications?

Yes, the 70V3389S4BF8 is qualified for industrial temperature operation (-40°C to +85°C) and is specified under the "70V3389S5" speed grade in the ordering information. The "S4" suffix in 70V3389S4BF8 denotes the 4.2 ns pipelined access time variant, which is commercially rated; however, the BF8 package variant corresponds to the industrial-grade 70V3389S5BF8 per IDT's ordering matrix - confirming full industrial qualification.

How does the dual chip enable (CE0/CE1) scheme simplify depth expansion with the 70V3389S4BF8?

The 70V3389S4BF8 uses two independent chip enables per port (CE0L/CE1L and CE0R/CE1R) to implement depth expansion without external logic. Enabling a port requires CE0X = L and CE1X = H; disabling requires CE0X = H or CE1X = L. Cascading multiple devices allows seamless address-space extension - e.g., two 64K × 18 devices yield 128K × 18 - with no additional decode gates or timing penalties.