Cypress Semiconductor Corp CY7C09289V-6AXC

Overview

CY7C09289V-6AXC from Cypress Semiconductor is a 3.3V, 64K × 16-bit synchronous dual-port static RAM with true dual-ported architecture enabling simultaneous read/write access to the same memory location, 100 MHz pipelined operation, 6.5 ns clock-to-data access (tCD2), and 100-pin TQFP package for industrial temperature range (–40°C to +85°C). It serves as shared memory buffer in high-speed DSP co-processing systems.

For engineers reviewing the CY7C09289V-6AXC datasheet, CY7C09289V-6AXC pinout, CY7C09289V-6AXC application, or CY7C09289V-6AXC equivalent, key selection criteria include pipelined vs. flow-through timing mode selection via FT/PIPE pin, dual-chip-enable depth expansion capability, and byte-select control for 16-bit bus matching in real-time embedded inter-processor communication.

Technical Context

This device implements fully synchronous dual-port SRAM logic with independent left/right address, data, and control registers-each port features dedicated burst counter, ADS-triggered address load, and CNTEN-controlled auto-increment. The internal write pulse is self-timed and independent of clock edge transitions, minimizing cycle time variability.

Pipelined output mode registers data on both ports for deterministic 10 ns minimum cycle time (tCYC2 = 10 ns at -6 speed grade), while flow-through mode bypasses output registers for zero-cycle latency (tCD1 = 15 ns). Mode selection is static per port via FT/PIPE pin, and both ports support TTL- or CMOS-level standby current states (ISB1/ISB3).

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Plastic Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm pitch, RoHS-compliant Pb-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous dual-port SRAM applications.

Compared with IDT70V27L15PF and CY7C028V-25AXC, CY7C09289V-6AXC uniquely delivers 100 MHz pipelined operation, integrated burst counters, and 3.3V/10 μA standby - making it the only option for new high-speed, low-power, deterministic shared-memory architectures.

Availability

CY7C09289V-6AXC is available at Aetrix Electronics and suitable for telecom line cards, DSP co-processor subsystems, and industrial motion controllers requiring stable component supply across extended product lifecycles.

Supply support for CY7C09289V-6AXC 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance memory and programmable solutions for industrial, automotive, and communications markets.

CY7C09289V belongs to the CY7C09x69V/79V/89V synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.

FAQ

What is the difference between pipelined and flow-through modes?

Pipelined mode registers output data on the clock edge, delivering 6.5 ns clock-to-data (tCD2) and enabling 100 MHz operation but adding one-cycle latency. Flow-through mode bypasses the output register, yielding zero-cycle latency (tCD1 = 15 ns) at reduced speed (53 MHz max). Mode is selected statically per port via the FT/PIPE pin.

Can CY7C09289V-6AXC be used for depth expansion beyond 64K × 16?

Yes - dual chip enables (CE0/CE1) allow stacking multiple devices using shared address/data buses and decoded CE lines. For example, two CY7C09289V-6AXC units can implement 128K × 16 with no external address multiplexing logic, leveraging native CE timing and automatic power-down per chip.

Does this device support simultaneous write operations to the same memory location?

No - writing simultaneously to the same address via both ports results in undefined final data value, as stated in the datasheet Note 11. System design must implement external arbitration or address partitioning to prevent concurrent writes to identical locations.

How does the burst counter function with ADS and CNTEN signals?

ADS loads the external address into the burst counter on its falling edge. When CNTEN is asserted, the counter increments on each rising clock edge - enabling sequential access without external address generation. CNTRST resets the counter to zero. This sequence supports circular buffer and DMA-like behavior with minimal host intervention.