Cypress Semiconductor Corp CY7C1414KV18-300BZC

Overview

CY7C1414KV18 from Cypress Semiconductor is a 1M × 36, 36-Mbit QDR® II SRAM with two-word burst architecture, 333 MHz clock operation (666 MHz DDR data rate), 1.8 V core supply, and 1.4–1.8 V I/O supply. It features separate read/write ports, echo clocks (CQ/CQ), and PLL-based timing control for high-speed networking buffers in packet-switched routers.

For engineers reviewing the CY7C1414KV18 datasheet, CY7C1414KV18 pinout, CY7C1414KV18 application, or CY7C1414KV18 equivalent, key selection criteria include its 19-bit address bus, 36-bit bidirectional DDR data interface, DOFF-configurable 1.5-cycle/1-cycle read latency, and 165-ball FBGA package compatibility with high-density memory subsystems.

Technical Context

The CY7C1414KV18 implements a synchronous pipelined QDR II architecture with fully independent read and write ports sharing a multiplexed 19-bit address bus. Read and write operations are latched on alternate rising edges of K/K clocks, enabling concurrent access without bus turnaround.

It uses dual output clocks (C/C) with corresponding echo clocks (CQ/CQ) to deskew data capture timing across PCB traces, and integrates a phase-locked loop (PLL) to align internal timing for precise 666 MHz DDR data placement. The device supports byte-write masking via four BWS signals and operates with 1.5-cycle read latency when DOFF = HIGH.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C33618B-333BIN and IS45S32800J-333BLI, the CY7C1414KV18 provides unique advantages in timing determinism (via CQ/CQ and PLL), configurability (DOFF), and signal integrity (ZQ, variable drive), making it optimal for demanding telecom and test equipment designs.

Availability

CY7C1414KV18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network processor interfaces, telecom baseband processing, and ATE pattern memory requiring stable component supply and long-term industrial availability.

Supply support for CY7C1414KV18 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

The QDR® II SRAM product line was designed specifically for ultra-low-latency, high-throughput memory subsystems in networking and telecom infrastructure, emphasizing deterministic timing, concurrent access, and signal integrity at multi-Gbps data rates.

FAQ

What is the function of the DOFF pin on CY7C1414KV18?

The DOFF (Data Output OFFset) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle QDR II latency for optimized timing margin in high-speed systems; when LOW, it reverts to 1-cycle QDR I latency for backward compatibility. This setting is sampled synchronously on the K clock edge and affects all subsequent read operations until changed.

How does the CY7C1414KV18 handle byte-write operations?

Byte-write is controlled by four active-low BWS[3:0] signals, each selecting one 9-bit byte within the 36-bit D[35:0] bus: BWS0 → D[8:0], BWS1 → D[17:9], BWS2 → D[26:18], BWS3 → D[35:27]. During a write, only bytes with asserted BWS signals are updated; unselected bytes retain prior contents, enabling partial-word updates without read-modify-write cycles.

Can CY7C1414KV18 operate with a single clock domain instead of differential clocks?

Yes - the device supports single-clock mode where K and C are tied together (and K and C tied together), allowing use of only two clocks instead of four. In this mode, Q outputs are clocked by K/K, and CQ/CQ become echoes of K/K. All timing parameters remain valid, but echo-clock deskew benefits are reduced compared to full differential operation.

What is the role of the ZQ pin in CY7C1414KV18?

ZQ is an impedance calibration reference pin connected to an external 240 Ω resistor to ground. It enables on-die termination (ODT) calibration for HSTL I/O drivers, ensuring consistent output impedance across voltage and temperature variations. This maintains signal integrity at 666 MHz and reduces PCB routing constraints for stub-free topologies.