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34. The production of PCB should pay attention to what?

In Electronic Infomation Category: 3 | on October 19,2011

The production of PCB should pay attention to the following matters: (1) a reasonable partition the circuit board, such as the strong, weak signal, digital, analog signals. As far as possible interference sources (such as motors, relays) and 34 datasheet and the sensitive components (such as SCM) away from. (2) and 34 price and high-power single-chip device to separate down to the ground, to reduce mutual interference. High-power devices on the edge of the board as possible. Separation of digital and 34 suppliers and analog. (3) to give the single-chip power supply of filter circuit or regulator, generally beads, 100 Q resistance can also be used instead. (4) note that the crystal wiring. Crystal to the microcontroller pins as close as possible, land line to isolate the clock area, crystal shell ground and fixed. (5) wiring t...

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34 datasheet34 suppliers34 Price

34. IEEE 1394 what cable specifications?

In Electronic Infomation Category: 3 | on September 27,2011

IEEE 1394 cable was designed, which contains 6 copper wire Yin: Two-Unit is responsible for power supply, the other four share two twisted pairs, twisted pair signal Figure 14 - 5 six-core cable profile shown in Figure 14-5. Among them, the power supply line voltage is maintained at between 8 ~ 40V DC current can be up to 1.5 A, the role is to: (1) power failure or failure to maintain the continuity of the physical layer device - This serial communication is especially important. (2) is connected to the bus-powered. do as wires and 34 datasheet and signal lines within the same cable, so the users to install them particularly convenient, but also extremely simple device designed to remove the complexity of the cable and 34 price and socket joints. The real current contact is carried out within the cable conn...

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34 datasheet34 suppliers34 Price

34. How to configure the decoupling capacitors?

In Electronic Infomation Category: 3 | on September 06,2011

Decoupling capacitor configuration may play a role in immunity, its configuration to the following points: (1) If a meter in a number of block logic board, power supply and 34 datasheet and ground are usually The introduction is too near, and 34 price and then a capacitor (10 ~ 100 pF) and 34 suppliers and a ceramic capacitor (O.01 ~ Ol r / F), between boards to prevent mutual interference. (2) - as should the PCB of each IC power input is access to a high-frequency characteristics of a good bypass capacitor (0.01 ~ Ol tl_F), the switching current through the line limited to printed circuit board within a very small range. Bypass capacitor leads are short and bear against the need to bypass the integrated devices power and ground terminal. (3) microcomputer reset terminal will be in strong interference peak voltage disturbance, a...

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