Cypress Semiconductor Corp CY7C25632KV18-500BZC

Overview

CY7C25632KV18 from Cypress Semiconductor is a 72-Mbit QDR® II+ SRAM with 4M × 18 organization, 550 MHz clock frequency, 2.5-cycle read latency, and on-die termination (ODT) supporting D[17:0], BWS[1:0], and K/K inputs. It features separate read/write ports, DDR interfaces on both ports (1100 MHz data rate), and operates at 1.8 V core / 1.4–1.8 V I/O for high-bandwidth networking buffer applications.

For engineers reviewing the CY7C25632KV18 datasheet, CY7C25632KV18 pinout, CY7C25632KV18 application, or CY7C25632KV18 equivalent, key selection criteria include concurrent read/write capability, echo clock (CQ/CQ) timing support, QVLD data validity signaling, HSTL I/O compatibility, and FBGA-165 package integration in high-speed packet buffering systems.

Technical Context

The CY7C25632KV18 implements a synchronous pipelined architecture with independent read and write ports sharing a multiplexed 20-bit address bus. Address latching occurs on alternating rising edges of K and K clocks, enabling full concurrency without bus turnaround.

It uses a PLL for precise data placement and supports two latency modes: 2.5-cycle read latency when DOFF = HIGH, and 1-cycle latency when DOFF = LOW. Echo clocks CQ and CQ are free-running and edge-aligned to K/K, simplifying high-speed data capture in SerDes-adjacent memory subsystems.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, with 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10PF and IS61WV102418BLL-10BLI, the CY7C25632KV18 uniquely delivers 72-Mbit density with integrated ODT, echo clocks, and programmable latency-enabling higher throughput and simpler PCB layout in next-generation networking hardware.

Availability

CY7C25632KV18 is available at Aetrix Electronics and suitable for high-speed network packet buffering, telecom line card data buffers, and multi-core processor cache coherence directory applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C25632KV18 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

The QDR® II+ SRAM product line was designed specifically for ultra-low-latency, high-throughput memory subsystems in networking ASICs, FPGA-based accelerators, and test equipment-emphasizing concurrent access, signal integrity, and system-level timing simplicity.

FAQ

What is the function of the DOFF pin on CY7C25632KV18?

The DOFF (Delay OFF) pin configures read latency mode: when asserted HIGH, it enables 2.5-cycle read latency for maximum bandwidth in streaming applications; when LOW, it reverts to 1-cycle latency for minimal access delay in control-path lookups. This pin is sampled at power-up and remains static during operation unless reset.

How does On-Die Termination (ODT) work on this SRAM?

ODT applies programmable termination resistance to D[17:0], BWS[1:0], and K/K inputs using an internal resistor network calibrated against the ZQ pin's external reference resistor. ODT range (low/high) is selected by the ODT pin voltage, eliminating need for 50 Ω external resistors and improving signal integrity on high-speed buses.

Can CY7C25632KV18 be used with a 1.5 V I/O supply?

Yes - the device supports I/O VDDQ from 1.4 V to 1.8 V, including 1.5 V. Its HSTL Class I inputs and variable-drive outputs are fully compliant at 1.5 V, enabling interoperability with legacy 1.5 V FPGAs and ASICs without level-shifting circuitry.

What is the role of CQ and CQ echo clocks?

CQ and CQ are free-running, edge-aligned copies of the K and K input clocks, respectively. They provide source-synchronous timing references for capturing Q[17:0] output data in receiving logic (e.g., FPGA IDELAY/ISERDES), relaxing PCB trace length matching requirements and enabling reliable 550 MHz DDR operation.