Answering growing concerns about manufacturing yields for PCBs populated with increasingly smaller components, Littelfuse has introduced a nickel barrier termination option for its complete line of 0402 (EIA 1005) size multilayer varistor (MLV) products.
This feature enhances their solderability by improving the wetting characteristics of the termination and thus resisting sliding and tombstoning during board assembly, says the company. The improved solderability is especially important in the manufacturing of small digital consumer technology products where board space is at a premium. The propriety nickel barrier treatment provides a component with greater flexibility in board layout and processing. Littelfuse says this maintains high quality solder coverage, superior fillet heights and resistance to tombstoning. In addition to its 0402 sizes, the company is now able to offer the nickel barrier option for all of its MLV products.
Circuit board layout issues such as solder pad size and orientation or proximity to larger components (that act like heatsinks) can contribute to poor solder performance, as can choice of time versus temperature profile. Extremely small components (ie, 0402 outline) with silver-based termination options, are more susceptible to these soldering issues than devices with nickel barrier terminations. In the nickel barrier process, a plated nickel layer is placed over the standard silver termination to ensure that the termination is immune to solder leaching. Tin plating is then placed over the nickel layer to improve solder wetting characteristics.
With the new addition to the multilayer varistor families, Littelfuse has added to its leading electrostatic discharge (ESD) suppression portfolio that protects data lines, signal lines, and power buses. The portfolio includes multilayer varistors (MLVs), silicon rail-clamp and TVS diode arrays as well as ultra-low capacitance PulseGuard polymer products to provide design engineers with one of the broadest range of electrostatic discharge (ESD) solutions in the industry.
For additional information regarding the new nickel barrier termination option for Littelfuse multilayer varistors or to learn more about ESD protection see www.littelfuse.com
For more information contact Ashley Sundraj, Arrow Altech Distribution, 011 923 9600, [email protected]
Accelerate development of physical AI deployments Altron Arrow
DSP, Micros & Memory
With Avocado OS now available on the HummingBoard RZ-V2N-
AIoT and SolidSense AIoT V2N from SolidRun, teams can move from prototype to deployed fleet in weeks.
Read more...Universal NFC device Altron Arrow
DSP, Micros & Memory
Delivering high-end performance in a compact 4 x 4 mm package, the multipurpose NFC reader from ST Microelectronics, enables the convenience of contactless interaction and features for various end applications.
Read more...Compact direct Time-of-Flight 3D LiDAR module Altron Arrow
AI & ML DSP, Micros & Memory
The VL53L9 from STMicroelectronics is the first direct Time-of-Flight (dToF) 3D LiDAR all-in-one module in ST’s portfolio, offering a resolution of 2,3K zones, wide field of view, on-chip processing, 100 frames per second, and sensing range from 5 centimeters to 9 meters.
Read more...SoC brings scalable edge AI to life Altron Arrow
AI & ML
The NXP i.MX 937 applications processor is optimised for performance without excessive power draw and bridges the gap between entry-level chips and high-end processors.
Read more...Compact direct Time-of-Flight 3D LiDAR module Altron Arrow
Opto-Electronics Electronics Technology AI & ML
The VL53L9 from STMicroelectronics is the first direct Time-of-Flight (dToF) 3D LiDAR all-in-one module in ST’s portfolio, offering a resolution of 2,3K zones, wide field of view, on-chip processing, 100 frames per second, and sensing range from 5 centimeters to 9 meters.
Read more...Generating negative voltages from a positive supply Altron Arrow
Editor's Choice Passive Components
It is common for IoT devices, industrial sensors, meters, and medical equipment to require both a positive and negative voltage, and this article explains the options available to produce a negative rail from a positive rail supply.
Read more...Addressing latency and signal integrity challenges Altron Arrow
DSP, Micros & Memory
Strengthening Microchip Technology’s data centre solutions portfolio, its XpressConnect retimers support high-bandwidth architectures, while helping reduce integration complexity.
Read more...Precision timing in compact package Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Designed for use in harsh environments, the EX-423 incorporates a four-point mounted quartz crystal structure that improves shock resistance and reduces g-sensitivity.
Read more...EMC limits and levels Altron Arrow
Editor's Choice Circuit & System Protection
As soon as electronics and electrical systems started interfering with each other, the world had to come to some consensus. Considering physics is universal and does not care about what country electrical/electronic products are used in, it should be the same everywhere, right? It is nearly there, but not quite.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version