CY7C016A-15AXC

Memory IC Overview

The CY7C016A-15AXC is a 16K x 9 asynchronous dual-port static RAM manufactured by Infineon Technologies. It features true dual-ported memory cells allowing simultaneous independent access to the same location via on-chip arbitration logic. The device operates at a maximum access time of 15 ns with a typical operating current of 180 mA and standby current of 0.05 mA. It supports automatic power-down controlled by Chip Enable pins and includes semaphore flags for software handshaking. The component is housed in an 80-pin Pb-Free Thin Quad Flat Pack (TQFP) package.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent read/write access to shared memory locations
• On-chip arbitration logic with BUSY flags to resolve contention between ports
• Integrated semaphore latches and interrupt flags for port-to-port communication and resource allocation
• Automatic power-down mode activated independently by Chip Enable signals

Memory IC Applications

• Interprocessor and multi-processor system designs requiring shared data buffers
• Communications status buffering applications
• Dual-port video and graphics memory systems

Memory IC Procurement Notes

Verify the specific suffix AXC confirms the Pb-free packaging requirement for your assembly process. Confirm the -15 speed grade matches your timing constraints. Check for end-of-life status as this component originates from Cypress Semiconductor, now part of Infineon. Ensure the 80-pin TQFP footprint aligns with your PCB design guidelines.

Memory IC Selection Notes

Select this component when a 16K x 9 word width is required for dual-port applications. The -15 speed grade provides a 15 ns access time suitable for moderate-speed interfaces. Consider the 80-pin TQFP package if space allows; alternative packages like PLCC are not available for this specific organization. Evaluate the need for semaphore functionality if complex handshaking is required between processors.

Memory IC Part Context

This part belongs to the CY7C016A/CY7C017A family of low-power CMOS dual-port SRAMs. It shares architectural similarities with the CY7C006A and CY7C007A but offers a 9-bit data bus width instead of 8 bits. The family utilizes 0.35-micron CMOS technology to balance speed and power consumption for commercial temperature range applications.

Memory IC Replacement Considerations

CY7C016A-15AC: Identical electrical specifications and functionality, differing only in non-Pb-free packaging.

Memory IC FAQ

How does the device handle simultaneous writes to the same memory address?

The device uses on-chip arbitration logic. If both ports attempt to write to the same location simultaneously, the BUSY flag asserts to indicate contention, and one port gains priority based on the M/S pin configuration or timing.

What is the function of the SEM pin?

The Semaphore (SEM) pin acts as a chip select for the internal semaphore latches when held LOW while CE is HIGH. It allows ports to reserve shared resources by writing tokens to these dedicated latch locations.