Cypress Semiconductor Corp CY7C15632KV18-500BZC

Overview

CY7C15632KV18-500BZC from Cypress Semiconductor is a 72-Mbit QDR® II+ SRAM with four-word burst architecture, 2.5-cycle read latency, and dual DDR interfaces operating at 500 MHz (1000 MT/s). It features separate read/write ports, echo clocks (CQ/CQ), QVLD data-valid indicator, and operates with core VDD = 1.8 V ± 0.1 V and I/O VDDQ = 1.4–1.8 V. Used in high-bandwidth packet buffering for network switches and routers.

For engineers reviewing the CY7C15632KV18-500BZC datasheet, CY7C15632KV18-500BZC pinout, CY7C15632KV18-500BZC application, or CY7C15632KV18-500BZC equivalent, key selection considerations include its 4 M × 18 organization, HSTL I/O compatibility, PLL-enabled 2.5-cycle latency mode, and FBGA-165 package with ZQ impedance calibration.

Technical Context

The device implements a synchronous pipelined architecture with independent read and write ports sharing a multiplexed 20-bit address bus. All inputs (RPS, WPS, BWS[1:0], A[19:0], D[17:0]) are registered on rising edges of K/K clocks; all outputs (Q[17:0], QVLD, CQ/CQ) are edge-aligned to K/K.

It supports two operational modes: QDR II+ mode (DOFF = HIGH) with 2.5-cycle read latency and 500 MHz operation, and QDR I mode (DOFF = LOW) with 1-cycle latency up to 167 MHz. The integrated PLL enables precise data placement, while echo clocks simplify high-speed data capture without external delay compensation.

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 dual-port SRAM applications.

Compared with IDT72T36150L10BG and IS61WV102418BLL-10BLI, CY7C15632KV18-500BZC delivers 2× density, 43% higher bandwidth, integrated impedance control, and deterministic echo-clock timing - making it uniquely suited for next-generation packet processing and real-time instrumentation.

Availability

CY7C15632KV18-500BZC is available at Aetrix Electronics and suitable for network infrastructure, high-speed test equipment, telecom baseband systems, and AI accelerator designs requiring stable component supply and long-term manufacturability.

Supply support for CY7C15632KV18-500BZC 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.

CY7C15632KV18 belongs to the QDR® II+ SRAM product line, engineered specifically for deterministic, low-latency, high-throughput memory interfacing in packet-forwarding and real-time signal processing systems.

FAQ

What is the function of the DOFF pin?

The DOFF pin disables the internal PLL when pulled LOW, forcing the device into QDR I mode with 1-cycle read latency and maximum 167 MHz operation. When HIGH, the PLL enables full QDR II+ functionality including 2.5-cycle latency and 500 MHz operation. Pull-up resistor (≤10 kΩ to VDDQ) is required for normal use.

How does the ZQ pin affect signal integrity?

ZQ connects to an external resistor to ground to calibrate the output driver impedance of Q[17:0], CQ, and CQ pins to 0.2 × RQ. This ensures consistent 50-Ω matching across voltage and temperature, reducing reflections and jitter. Leaving ZQ unconnected or tied to GND violates specification and degrades timing margins.

Can CY7C15632KV18-500BZC be used with 1.5 V VDDQ?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, including 1.5 V. HSTL Class I input thresholds and variable-drive output buffers are fully compatible at 1.5 V, enabling interoperability with 1.5 V FPGA memory controllers without level shifters.

What is the role of CQ and CQ echo clocks?

CQ and CQ are free-running, phase-aligned copies of K and K clocks, respectively. They provide a local timing reference at the receiver end, eliminating the need for board-level delay matching between clock and data traces. This simplifies PCB layout and improves setup/hold margin in >500 MHz systems.