Renesas 70V3389S5BFI

Overview

70V3389S5BFI 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 cycle time (133 MHz), and selectable 3.3 V or 2.5 V I/O interface per port - used in real-time digital signal processing, FPGA co-processor buffering, and high-throughput packet switching systems.

For engineers reviewing the 70V3389S5BFI datasheet, 70V3389S5BFI pinout, 70V3389S5BFI application, or 70V3389S5BFI equivalent, key selection criteria include pipelined read latency, independent port voltage configuration (via OPTL/OPTR), counter-enable address auto-increment, dual chip enable for depth expansion, and industrial temperature support (−40°C to +85°C).

Technical Context

The 70V3389S5BFI implements fully synchronous operation on both left and right ports, with all control, address, and data inputs registered on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write timing from clock edge transitions, enabling consistent 4.2 ns (max) clock-to-data-out in pipelined mode.

Each port features independent address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and counter reset (CNTRSTL/CNTRSTR) logic, allowing external address generation or internal sequential addressing without bus contention. Byte enables (UBL/LBL and UBR/LBR) provide 9-bit granularity for multiplexed bus compatibility.

Key Specifications

Pinout & Package

70V3389S5BFI is packaged in a 128-pin Thin Quad Plastic Flatpack (TQFP), body size ≈ 14 mm × 20 mm × 1.4 mm, with 0.5 mm 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 CY7C1362BV33-5BC and AS7C362000B-5BIN, the 70V3389S5BFI uniquely delivers pipelined synchronous operation, per-port voltage configurability, and integrated address counter - enabling tighter timing closure, reduced BOM count, and simplified burst-mode firmware in industrial and telecom designs.

Availability

70V3389S5BFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, FPGA acceleration, and broadcast equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 70V3389S5BFI 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, specializes in high-performance timing, memory interface, and RF solutions for communications and computing markets.

The 70V3389S5BFI belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic latency, concurrent multi-processor access, and robust operation in mission-critical embedded systems.

FAQ

What is the maximum operating frequency of the 70V3389S5BFI?

The 70V3389S5BFI supports a 133 MHz maximum operating frequency, derived from its 7.5 ns pipelined clock cycle time (tCYC2). This specification applies across the full industrial temperature range (−40°C to +85°C) and is validated under worst-case voltage (VDD = 3.15 V) and process corner conditions. The device maintains this speed with either 3.3 V or 2.5 V I/O supplies, provided OPTL/OPTR and corresponding VDDQL/VDDQR are correctly configured.

How does the address counter function in the 70V3389S5BFI?

The 70V3389S5BFI implements an internal 16-bit address counter per port, controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTENX = VIL on the rising edge of CLKX, the counter advances to the next address regardless of ADSX state. CNTRSTX asynchronously resets the counter to zero. This feature eliminates external address sequencing logic in burst-mode applications such as DMA transfers or video line buffering, and is fully independent of CE0X/CE1X enable states.

Can the left and right ports of the 70V3389S5BFI operate at different I/O voltages?

Yes, the 70V3389S5BFI 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 operation and requires VDDQL = 3.3 V; setting OPTR = VIL (0 V) configures the right port for 2.5 V operation and requires VDDQR = 2.5 V. This capability enables direct interfacing with heterogeneous devices - for example, a 3.3 V FPGA on the left port and a 2.5 V ASIC on the right port - without external level shifters.

What is the purpose of the dual chip enable (CE0/CE1) signals on the 70V3389S5BFI?

The dual chip enable signals (CE0L/CE1L and CE0R/CE1R) on the 70V3389S5BFI provide flexible port activation and power management. A port is enabled only when CE0X = VIL and CE1X = VIH; any other combination disables the port and places its internal circuitry into low-power standby. This design allows seamless depth expansion - for example, two devices can be stacked using shared address/data buses while selecting each via unique CE0X/CE1X combinations - eliminating the need for external decode logic.

Does the 70V3389S5BFI support asynchronous output enable?

Yes, the 70V3389S5BFI features asynchronous output enable signals (OEL and OER) that operate independently of the clock domains. When OEX = VIH, the corresponding port's I/O pins enter high-impedance state immediately, regardless of CLKX phase or internal pipeline stage. This capability simplifies integration with legacy asynchronous buses and enables dynamic bus sharing without introducing clock-domain crossing delays or metastability risks.