搜霸天下

搜霸天下

Monday, March 19, 2012

5 Kinds of Ship Numbers Systems

Ship numbers are unique ship identification numbers issued to the ships by an authority. Here I would like to introduce 5 kinds of Ship Numbers Systems to  you.

1. Global shipping number system - It is mainly based on the information of the ship’s type, its building place and time of its construction. This ship numbering system developed somewhere in 1998. This system is based on specific information like place and time of manufacture of the ship. The basic idea of the GSN system is to assign a unique 8 digit number to every ship. However, the main source of this database remains the information of ships already available.

2. Pennant number - Another type of number allotted to ships for their easy identification. Used mainly in some parts of Europe and the modern Royal navy, this system uses the information about the ship depending on its type.

3. Listing by the Hull number - A system of ship numbers famous mostlyin US navy; this is a rather old system which dates back to 1880s.However, a newer version of this system was introduced somewhere in 1920when the information of ships in US navy was combined using their hullnumber mentioned for every ship and a unique alphabetical code assignedto the ship.

4. IMO number system - Its one of the most commonly used and popular system of ship identification is the IMO number system. This is the numbering system issued by the International Maritime Organization. This IMO number is one of the most important of the ship numbers.

5. MMSI numbering system - Use of a Maritime Mobile Service Identity (MMSI) number. This is a nine digit number which is transmitted over the radio channels to be picked up by earth ship stations all over the world.
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Tuesday, May 3, 2011

Features and Suggested Applications about Ic components BAV99WT1 and BAV99RWT1

The BAV99WT1 is a smaller package, equivalent to the BAV99LT1.

Features

? Pb-Free Packages are Available
Suggested Applications

? ESD Protection

? Polarity Reversal Protection

? Data Line Protection

? Inductive Load Protection

? Steering Logic

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Thursday, April 28, 2011

Electronic components AD548 Features and IC trading market Site recommended

Features follows:

Enhanced Replacement for LF441 and TL061
DC Performance:

200  A max Quiescent Current

10 pA max Bias Current, Warmed Up (AD548C)

250  V max Offset Voltage (AD548C)

2  V/ C max Drift (AD548C)

2  V p-p Noise, 0.1 Hz to 10 Hz
AC Performance:

1.8 V/ s Slew Rate

1 MHz Unity Gain Bandwidth

Available in Plastic and Hermetic Metal Can Packages
and in Chip Form

Available in Tape and Reel in Accordance with
EIA-481A Standard

MIL-STD-883B Parts Available

Dual Version Available: AD648

Surface-Mount (SOIC) Package Available

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Electronic components AD548 PRODUCT DESCRIPTION and IC trading market Site recommended

PRODUCT DESCRIPTION follows:
The electronic component AD548 is a low power, precision monolithic operational amplifier. It offers both low  bias current (10 pA max, warmed up) and low quiescent current (200 μA max) and is  fabricated with ion-implanted FET and laser wafer trimming technologies.

Input bias current is guaranteed over the AD548’s entire common-mode voltage range.
The economical J grade has a maximum guaranteed input offset voltage of less than 2 mV and  an input offset voltage drift of less than 20 μV/°C. This level of dc precision is  achieved utilizing Analog’s laser wafer drift trimming process. The combination of low quiescent current and low offset voltage drift minimizes changes in input offset  voltage due to self-heating effects.

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Wednesday, April 27, 2011

Mechanical Data and Features about electronic component AZ23C2V7-AZ23C51

Mechanical Data

1.Case: SOT-23

2.Case Material: Molded Plastic, “Green” Molding Compound.
UL Flammability Classification Rating 94V-0

3.Moisture Sensitivity: Level 1 per J-STD-020D

4.Terminals: Matte Tin Finish annealed over Alloy 42 leadframe
(Lead Free Plating). Solderable per MIL-STD-202, Method 208

5.Polarity: See Diagram

6.Marking Information: See Page 3

7.Ordering Information: See Page 3

8.Approximate Weight: 0.008 grams

Features

1.Dual Zeners in Common Anode Configuration

2.300 mW Power Dissipation Rating

3.Ideally Suited for Automated Insertion

4.VZ For Both Diodes in One Case is ≤ 5%

5.Common Cathode Style Available See DZ Series

6.Lead, Halogen and Antimony Free, RoHS Compliant (Note 2)
“Green” Device (Note 3)

7.Qualified to AEC-Q101 Standards for High Reliability

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Tuesday, April 26, 2011

Applications and Features about electronic component B57621 from Hqew.net

Applications

1.Temperature measurement and
compensation in
– hybrid circuits
– data systems
– telecom systems
– automotive electronics

Features

1.Silver palladium termination (AgPd)

2.Cost-effective

3.Suitable for wave and reflow soldering

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Monday, April 25, 2011

DESCRIPTION about Electronic components BSS123

Electronic components BSS123 DESCRIPTION belows:

The electronic component BSS123 N-Channel Logic Level Enhancement Mode Field Effect  Transistor,General Description follows:

These N-Channel enhancement mode field effect transistors are produced using Fairchild’s  proprietary,high cell density, DMOS technology. These products have been designed to  minimize on-state resistance while provide rugged, reliable, and fast switching performance.These products are particularly suited for low voltage, low current  applications such as small servo motor control, power MOSFET gate drivers, and other switching applications.

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