Renesas 70V3389S5BF8

Overview

70V3389S5BF8 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 - used in real-time digital signal processing systems requiring low-latency inter-processor communication.

For engineers reviewing the 70V3389S5BF8 datasheet, 70V3389S5BF8 pinout, 70V3389S5BF8 application, or 70V3389S5BF8 equivalent, this page delivers verified timing parameters, validated dual-port counter control behavior, confirmed TQFP-128 and BGA package mappings, and precise voltage domain separation between core (3.3 V) and I/O (3.3 V/2.5 V) supplies.

Technical Context

The 70V3389S5BF8 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 external logic.

Key Specifications

Pinout & Package

70V3389S5BF8 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 CY7C1362BV33-100AXC and AS7C331024B-10BIN, the 70V3389S5BF8 uniquely delivers pipelined 133 MHz operation with integrated address counters and per-port I/O voltage flexibility - making it the only option supporting deterministic low-jitter burst transfers in tightly synchronized multi-processor systems.

Availability

70V3389S5BF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, medical imaging, and defense electronics requiring stable component supply across extended product lifecycles.

Supply support for 70V3389S5BF8 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 70V3389S5BF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V3389S5BF8?

The 70V3389S5BF8 supports a 133 MHz clock rate with a guaranteed 7.5 ns clock cycle time (tCYC2) across the industrial temperature range (–40°C to +85°C). This is validated under worst-case voltage (3.15 V VDD) and temperature conditions, and applies to both ports simultaneously in pipelined read mode.

Does the 70V3389S5BF8 support independent voltage domains for its two ports?

Yes - the 70V3389S5BF8 supports independent I/O voltage selection per port via OPTL and OPTR pins. Setting OPTL to VIH configures the left port for 3.3 V operation (VDDQL = 3.3 V); setting it to VIL configures for 2.5 V (VDDQL = 2.5 V). The same applies independently to the right port via OPTR. Core VDD remains fixed at 3.3 V.

How does the address counter function in the 70V3389S5BF8?

The 70V3389S5BF8 integrates independent 16-bit address counters on both ports. When CNTENL = LOW, the left port counter advances on each CLKL rising edge, generating sequential addresses regardless of CE or R/W state. CNTRSTL = HIGH resets the counter to address 0. ADSL overrides the counter with an external address when asserted LOW. Identical behavior applies to the right port via CNTENR/CNTRSTR/ADSR.

What is the power consumption of the 70V3389S5BF8 in full standby mode?

In full standby mode (ISB3), where both ports are disabled with CMOS-level inputs (CE0X and CE1X > VDDQ – 0.2 V), the 70V3389S5BF8 draws 6 mA typical and up to 15 mA maximum at 25°C. At industrial temperature extremes (–40°C to +85°C), maximum ISB3 rises to 30 mA - verified in the DC Electrical Characteristics table (Table 9).

Can the 70V3389S5BF8 be used for depth expansion without external logic?

Yes - the 70V3389S5BF8 includes dual chip enables (CE0L/CE1L and CE0R/CE1R) that enable direct depth expansion. For example, two devices can be stacked using shared address/data/control lines, with CE0L of Device 1 tied LOW and CE1L of Device 2 tied LOW to select each device independently - no additional decoding logic required.