CY7C25682KV18-450BZC

Memory IC Overview

The CY7C25682KV18-450BZC is a 72-Mbit DDR II+ Synchronous Pipelined SRAM organized as 4M x 18. It supports a maximum operating frequency of 450 MHz with a typical read latency of 2.5 cycles when the DOFF pin is asserted HIGH. The device utilizes a double data rate interface, transferring data at 900 MHz. It features On-Die Termination (ODT) for DQ, BWS, and clock inputs to reduce board area and simplify routing. The core voltage is 1.8 V ± 0.1 V, while I/O voltage ranges from 1.4 V to VDD.

Memory IC Feature Summary

• DDR II+ architecture with two-word burst capability for high bandwidth
• Integrated On-Die Termination (ODT) for input signals
• Echo clocks (CQ/CQ) and Valid Data Indicator (QVLD) for simplified capture
• Synchronous internally self-timed writes with byte write select support

Memory IC Applications

• High-performance networking equipment
• Telecommunications infrastructure
• Data communication systems requiring low latency

Memory IC Procurement Notes

Verify that the specific suffix '450BZC' corresponds to the 450 MHz speed grade and lead-free FBGA packaging as defined in the official Cypress/Infineon ordering guide. Confirm that the ODT range selection via the ZQ resistor matches system impedance requirements during power-up initialization. Ensure DOFF pin configuration aligns with the desired 2.5-cycle or 1-cycle latency mode.

Memory IC Selection Notes

Select this component for applications requiring pipelined synchronous memory with DDR interface capabilities. The 4M x 18 organization suits designs needing width expansion or specific data bus widths. Consider the 450 MHz speed grade if system timing allows for lower power consumption compared to higher-speed variants. Verify compatibility with HSTL I/O standards and available echo clock routing resources.

Memory IC Part Context

This part belongs to the CY7C25682KV18 family of 72-Mbit DDR II+ SRAMs manufactured by Cypress Semiconductor (now Infineon). It shares architectural similarities with the CY7C25702KV18 but differs in data width organization. The series is designed for high-speed parallel memory interfaces in embedded systems.

Memory IC Replacement Considerations

CY7C25682KV18-500BZC offers a higher 500 MHz speed grade within the same package and functional specification.

Memory IC FAQ

How is the On-Die Termination (ODT) range selected?

ODT range is selected during power-up initialization via the ODT pin. A LOW selects a low range following RQ/3.33, while a HIGH selects a high range following RQ/1.66.

What is the function of the QVLD pin?

QVLD is a valid output indicator that asserts half a cycle before valid data arrives, helping to simplify data capture in high-speed systems.