Cypress Semiconductor Corp CY7C15632KV18-500BZXC

Overview

CY7C15632KV18-500BZXC from Cypress Semiconductor is a 72-Mbit QDR® II+ SRAM with four-word burst architecture, 2.5-cycle read latency, 500 MHz clock operation, and separate read/write DDR ports delivering 1000 MT/s data rate. It operates at 1.8 V core (±0.1 V) and supports 1.4–1.8 V I/O supply, housed in a 165-ball FBGA (13 × 15 × 1.4 mm), and targets high-bandwidth packet buffering in network switches and routers.

For engineers reviewing the CY7C15632KV18-500BZXC datasheet, CY7C15632KV18-500BZXC pinout, CY7C15632KV18-500BZXC application, or CY7C15632KV18-500BZXC equivalent, key selection criteria include its 2.5-cycle read latency mode (DOFF = HIGH), echo clock (CQ/CQ) timing support, HSTL I/O compatibility, and depth expansion via RPS/WPS port selects.

Technical Context

The device implements a synchronous pipelined architecture with independent read and write ports sharing a multiplexed 20-bit address bus. All synchronous inputs (RPS, WPS, BWS[1:0], A[19:0], D[17:0]) are registered on rising edges of K and K clocks, enabling concurrent transactions without bus turnaround.

It integrates a PLL for precise data placement and uses echo clocks (CQ/CQ) aligned to K/K for simplified high-speed data capture. The QVLD signal indicates valid output data edge-aligned to CQ/CQ, and ZQ enables programmable output impedance matching to system bus termination.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L5PF and IS61WV102418BLL-10BLI, CY7C15632KV18-500BZXC delivers double density, selectable latency modes, and system-level timing aids (CQ/CQ, QVLD, ZQ), making it uniquely suited for next-generation networking and test instrumentation requiring deterministic 1000 MT/s throughput.

Availability

CY7C15632KV18-500BZXC is available at Aetrix Electronics and suitable for network switch fabric design, high-speed ATE memory subsystems, telecom baseband processing, and defense radar signal buffering requiring stable component supply across multi-year production cycles.

Supply support for CY7C15632KV18-500BZXC 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 global manufacturing and quality certification.

This device belongs to Cypress's QDR® II+ SRAM product line, engineered specifically for deterministic, high-throughput memory interfaces in packet-switched infrastructure where concurrent read/write and sub-3-cycle latency are critical.

FAQ

What is the function of the DOFF pin?

The DOFF pin controls PLL operation: when pulled HIGH, the device operates in QDR II+ mode with 2.5-cycle read latency and full 500 MHz capability; when pulled LOW, the PLL is disabled and the device reverts to QDR I timing with 1-cycle latency and maximum 167 MHz operation. This dual-mode flexibility allows backward compatibility while enabling peak performance.

How does the ZQ pin affect system design?

ZQ connects to an external resistor to ground (typically 240 Ω) to calibrate the output driver impedance of Q[17:0], CQ, and CQ pins to 0.2×RQ (e.g., 48 Ω). This eliminates need for discrete series termination resistors, reduces PCB component count, and improves signal integrity across temperature and voltage variations in high-speed HSTL interfaces.

Can CY7C15632KV18-500BZXC support depth expansion?

Yes - depth expansion is implemented using RPS (read port select) and WPS (write port select) signals. Multiple devices can be stacked with shared address/data buses and individual RPS/WPS lines asserted per device, enabling seamless memory capacity scaling without external logic or address decoding overhead.

What timing role do CQ and CQ serve?

CQ and CQ are free-running echo clocks synchronized to K and K, respectively. They provide source-synchronous timing references for capturing Q[17:0] data in receiving logic (e.g., FPGA input registers), eliminating setup/hold uncertainty caused by clock skew and PCB trace mismatch in high-speed DDR interfaces.