Infineon Technologies CY7C1911KV18-333BZC

Overview

CY7C1911KV18-333BZC from Cypress Semiconductor is a 2-Mbit × 9 (18-Mbit total) QDR® II SRAM with separate read/write ports, 333 MHz clock operation, DDR interfaces delivering 666 MT/s data rate, and 1.8 V core / 1.4–1.8 V I/O supply. It supports concurrent read/write transactions in high-bandwidth networking buffers and packet memory applications.

For engineers reviewing the CY7C1911KV18-333BZC datasheet, CY7C1911KV18-333BZC pinout, CY7C1911KV18-333BZC application, or CY7C1911KV18-333BZC equivalent, key selection factors include its 2M × 9 organization, echo-clock–assisted timing, DOFF-configurable 1-cycle/1.5-cycle read latency, and 165-ball FBGA package compatibility with high-speed SerDes subsystems.

Technical Context

The CY7C1911KV18 implements QDR II architecture with fully independent synchronous read and write ports sharing a multiplexed 19-bit address bus. Address latching occurs on alternate rising edges of the K clock, enabling four-word burst transfers per access.

It uses dual input clocks (K/K for control, C/C for output timing) and echo clocks (CQ/CQ) to align data capture at the receiver. The device integrates a PLL for precise data placement and supports JTAG 1149.1 boundary scan for system-level testability.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant, 1.0 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR II SRAM applications.

Compared with IDT72T3615L10BG and IS61WV102418BLL-15BLI, CY7C1911KV18-333BZC uniquely delivers 333 MHz DDR concurrency with echo-clock timing support - making it irreplaceable for 10 GbE switch fabric and SerDes-adjacent memory where deterministic latency and source-synchronous capture are mandatory.

Availability

CY7C1911KV18-333BZC is available at Aetrix Electronics and suitable for network packet buffering, switch fabric memory, telecom line card memory, and test equipment pattern memory requiring stable component supply across extended production lifecycles.

Supply support for CY7C1911KV18-333BZC 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, automotive, and industrial systems.

The QDR® II SRAM product line targets high-speed packet processing infrastructure, emphasizing concurrent access, low-latency timing, and robust signal integrity for 10 GbE+ applications.

FAQ

What is the function of the DOFF pin on CY7C1911KV18-333BZC?

The DOFF (Data Output OFF) pin configures read latency: when asserted HIGH, it enables 1.5-cycle latency for improved timing margin in high-frequency systems; when LOW, it selects 1-cycle latency for minimal pipeline delay. This setting directly controls internal register staging in the read data path and is sampled synchronously on the K clock.

Does CY7C1911KV18-333BZC support byte-level write masking?

No - CY7C1911KV18-333BZC provides only one Byte Write Select (BWS0) controlling the full 9-bit word. Unlike ×18 or ×36 variants that support multiple BWS signals, the ×9 configuration uses BWS0 to enable or disable writes to the entire D[8:0] bus; partial-word writes are not supported.

How does the ZQ pin function in impedance calibration?

The ZQ pin connects to an external 240 Ω resistor to ground, enabling on-die calibration of output driver impedance. During calibration, the device measures the reference resistance and adjusts internal termination to match target HSTL-18 levels (typically 25–35 Ω), ensuring consistent signal integrity across voltage and temperature variations.

Can CY7C1911KV18-333BZC operate with a single-ended clock input?

No - the device requires differential K/K and C/C clock inputs. Internal circuitry relies on the differential pair for noise immunity and precise edge detection; applying single-ended signals violates AC timing specifications and may cause metastability or functional failure. External termination (e.g., 100 Ω across K/K) is mandatory.