Cypress Semiconductor Corp CY7C1525KV18-300BZXC

Overview

CY7C1525KV18-300BZXC from Cypress Semiconductor is a 72-Mbit QDR® II SRAM with 8M × 9 organization, 300 MHz maximum operating frequency, 1.8 V core supply, and 1.4–1.8 V I/O supply. It implements dual independent DDR read/write ports with 2-word burst, echo clocks (CQ/CQ), and DOFF-controlled 1-cycle or 1.5-cycle read latency-used in high-bandwidth packet buffering for network line cards.

For engineers reviewing the CY7C1525KV18-300BZXC datasheet, CY7C1525KV18-300BZXC pinout, CY7C1525KV18-300BZXC application, or CY7C1525KV18-300BZXC equivalent, key selection criteria include synchronous self-timed write timing, HSTL-18-compatible variable-drive outputs, JTAG 1149.1 test access, and FBGA-165 package thermal/mechanical compatibility with high-speed PCB stackups.

Technical Context

The device uses separate K/K input clocks for address/data capture on rising edges only, and independent C/C output clocks to minimize skew between data and capture clock paths. Its PLL ensures precise data placement relative to echo clocks (CQ/CQ), enabling reliable latch timing at 700 MT/s DDR rates.

Read and write ports share a multiplexed address bus but operate fully concurrently via RPS/WPS controls; depth expansion is supported through port-select signals (RPS/WPS) and byte write enables (BWS0). All operations are synchronous, with internal pipelining delivering deterministic 1- or 1.5-cycle read latency depending on DOFF state.

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 lead-free finish (BZXC suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102418BLL-10BLI, CY7C1525KV18-300BZXC delivers 5.4 GB/s bandwidth via true dual-port DDR, eliminates board-level clock forwarding complexity with CQ/CQ, and supports deterministic sub-ns timing closure in FPGA-based systems-making it uniquely suited for next-generation packet-processing architectures.

Availability

CY7C1525KV18-300BZXC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing memory, and FPGA co-processor cache applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1525KV18-300BZXC 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 mixed-signal ICs for networking, automotive, and industrial applications, with emphasis on signal integrity and system-level integration.

CY7C1525KV18 belongs to the QDR® II SRAM product line, engineered specifically for deterministic, high-bandwidth memory access in packet-forwarding engines, baseband processors, and FPGA-accelerated compute platforms.

FAQ

What is the function of the DOFF pin on CY7C1525KV18-300BZXC?

The DOFF (Data Output OFFset) pin selects read latency mode: when asserted HIGH, it enables 1.5-cycle pipelined read latency for maximum throughput; when LOW, it configures 1-cycle latency compatible with QDR I timing. This setting directly affects the number of clock cycles between address assertion and valid Q-bus output, and must be held stable during operation.

How does the CY7C1525KV18-300BZXC handle write operations without external write-enable strobes?

It uses synchronous self-timed writes controlled by WPS (Write Port Select) and BWS0 (Byte Write Select). WPS sampled on the rising edge of K initiates the write; internal circuitry automatically sequences address decode, data latching, and array write-eliminating need for external write-strobe timing control or wait-state generation.

Can CY7C1525KV18-300BZXC operate with only one clock domain (K = C)?

Yes-single-clock mode is supported per datasheet Section 9. When K and C are tied together, the device uses that common clock for both input latching and output registration. However, echo clocks (CQ/CQ) and optimal skew compensation require separate C/C; single-clock mode trades timing margin for simplified clock tree design.

What is the purpose of the ZQ pin on CY7C1525KV18-300BZXC?

ZQ is a dedicated reference pin for impedance calibration of HSTL-18 output drivers. Connected to a 240 Ω ±1% resistor to VSS, it enables on-die termination calibration to maintain consistent output drive strength across voltage/temperature variations-critical for signal integrity at 700 MT/s DDR rates.