Cypress Semiconductor Corp CY7C1514V18-200BZC

Overview

CY7C1514V18 from Cypress Semiconductor is a 72-Mbit QDR-II SRAM with 2M × 36 organization, 1.8V core supply, and dual DDR interfaces supporting 250 MHz operation (500 MT/s per port). It implements separate read/write ports with echo clocks (CQ/CQ), DLL-based data alignment, and HSTL I/O for high-speed networking buffers and packet memory in telecom line cards.

For engineers reviewing the CY7C1514V18 datasheet, CY7C1514V18 pinout, CY7C1514V18 application, or CY7C1514V18 equivalent, key selection criteria include x36 bus width, 20-bit address mapping, BWS[3:0] byte write control, VDDQ = 1.4–1.8V compliance, and 165-ball FBGA (15 × 17 mm) mechanical fit.

Technical Context

This device uses synchronous pipelined architecture with independent K/K input clocks for address/data capture and C/C output clocks for data launch, enabling concurrent read/write operations without bus turnaround. The Delay Lock Loop (DLL) aligns Q[35:0] outputs to CQ/CQ edges with sub-cycle timing precision.

All 36-bit data writes are controlled by four active-low Byte Write Selects (BWS[3:0]), each gating one 9-bit byte; reads deliver two sequential 36-bit words per access on rising edges of C and C. Address inputs A[19:0] are multiplexed for both ports, latched on alternating K/K edges.

Key Specifications

Pinout & Package

165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm body, 1.4 mm height, 0.8 mm ball pitch. RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C362000B-20BIN and IS61WV204836BLL-15BLI, CY7C1514V18 delivers 25% higher bandwidth, eliminates external bus turnaround logic via true dual-port architecture, and integrates DLL + echo clocks to relax PCB routing constraints in >200 MHz designs.

Availability

CY7C1514V18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network processor interfacing, telecom baseband processing, and test equipment memory subsystems requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1514V18 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 communications, industrial, and automotive systems.

CY7C1514V18 belongs to the QDR-II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory in packet infrastructure and real-time signal processing applications.

FAQ

What is the minimum VDDQ voltage supported for CY7C1514V18 operation?

The device supports VDDQ from 1.4 V to 1.8 V. Operation below 1.4 V is not guaranteed - HSTL Class I output drive strength and timing parameters are specified only within this range. Using 1.5 V VDDQ is typical for compatibility with 1.5 V FPGA I/O banks while maintaining noise margin.

Can CY7C1514V18 operate with only the K clock (single-clock mode)?

Yes. In single-clock mode, K serves as both input and output clock: data inputs are latched on K's rising edge, and data outputs are driven on the same edge. C/C and CQ/CQ are unused, simplifying clock routing but reducing maximum achievable bandwidth due to lack of deskew capability.

How does the ZQ pin affect output impedance calibration?

ZQ connects to an external resistor (RQ) tied to ground; the device measures RQ and scales all output drivers (Q[35:0], CQ, CQ) to 0.2×RQ. If ZQ is tied to VDDQ, outputs default to minimum impedance (~25 Ω); leaving ZQ floating or grounded violates specification and may cause signal integrity failure.

What happens when DOFF is asserted low?

Asserting DOFF disables the internal Delay Lock Loop, reverting output timing to basic flip-flop propagation paths. This increases tAC (address-to-output) variation by up to ±150 ps and invalidates DLL-dependent timing specs - use only when system-level clock distribution fully compensates for skew.