Infineon Technologies CY7C25632KV18-500BZXC

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 delivers 1100 MT/s DDR data rates on independent read/write ports and operates at core VDD = 1.8 V ± 0.1 V with I/O VDDQ = 1.4–1.8 V, targeting high-bandwidth packet buffering in network switches and routers.

For engineers reviewing the CY7C25632KV18 datasheet, CY7C25632KV18 pinout, CY7C25632KV18 application, or CY7C25632KV18 equivalent, this device supports concurrent read/write transactions, echo-clock–synchronized data capture via CQ/CQ, QVLD-driven valid-data indication, and depth expansion using RPS/WPS port selects - all critical for deterministic low-latency memory subsystems.

Technical Context

The CY7C25632KV18 implements a synchronous pipelined architecture with physically separate read and write data paths, eliminating bus turnaround overhead. Its four-word burst transfers 72 bits per cycle (18-bit × 4), latching addresses on alternating rising edges of complementary K/K clocks while using only rising edges for internal timing.

It integrates an on-chip PLL for precise data placement, HSTL-class I/O buffers with variable drive strength, and programmable ODT with dual-range selection (RQ/3.33 or RQ/1.66) controlled by the ODT pin. The ZQ pin enables output impedance calibration to match system trace impedance, and QVLD provides edge-aligned validity signaling synchronized to CQ/CQ.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed burst SRAM applications.

Compared with IDT72T36120L10PF and IS61WV102418B, the CY7C25632KV18 delivers 2.3× higher bandwidth, eliminates 36 external terminators via ODT, and removes clock distribution complexity with integrated echo clocks - making it optimal for new 5G infrastructure and high-end ATE designs demanding deterministic sub-100 ns latency.

Availability

CY7C25632KV18 is available at Aetrix Electronics and suitable for network switching, telecom baseband processing, high-speed test instrumentation, and FPGA-based protocol acceleration requiring stable component supply and long-term lifecycle assurance.

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) designs high-performance memory and programmable solutions for networking, automotive, and industrial applications, with emphasis on signal integrity and timing predictability.

The QDR® II+ SRAM product line targets deterministic, high-bandwidth memory interfaces in ASIC/FPGA-based systems where concurrent read/write, low latency, and simplified PCB routing are mandatory - especially in packet-processing and real-time test equipment.

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 and timing margin; when LOW, it reverts to 1-cycle latency like QDR I devices. This pin is sampled at power-up and remains static during operation - it is not a runtime control signal.

How does the ZQ pin affect output driver impedance?

The ZQ pin connects to an external precision resistor (typically 240 Ω) to ground, enabling automatic calibration of CQ, CQ, and Q[17:0] output drivers to 0.2 × RQ (e.g., 48 Ω). This ensures consistent signal integrity across voltage/temperature variations and eliminates manual drive-strength tuning in high-speed layouts.

Can CY7C25632KV18 be used with a single-ended clock source?

No - the device requires true differential K/K clock inputs. Driving K with a clock signal and tying K to a fixed voltage violates timing specifications and disables proper DDR operation. A dedicated differential clock generator or FPGA clock buffer with LVDS/HSTL output must be used.

What happens to Q[17:0] when RPS is deasserted?

When RPS is deasserted (HIGH), the read port is deselected and Q[17:0] drivers enter high-impedance (tri-state) mode on the next rising edge of K. Pending read bursts complete before tri-state activation, ensuring no partial or corrupted data is driven onto the bus during port disable transitions.