In electronic circuit design, such a circuit may be needed:
The microcontroller outputs a 5V or 3.3V signal, but the signal on the bus is 12V or 24V or even higher. The logic signal that the one-chip computer I/O exports can react to the communication bus, and when the level on the bus has changed, can also respond to the I/O mouth of the one-chip computer, and only use one I/O mouth of the one-chip computer, but not Need to input and output each occupy an I / O, do not need to use a comparator.
For bidirectional level conversion circuits, there are also mature chips on the market, such as maxim's max13042, but these chips are limited to two-way communication between standard logic levels, and the communication voltage is relatively low.
For example, the max13042 is a 1.62V bidirectional communication with 3.6V. In practical applications, there may be a need for bidirectional voltage conversion of 5V and 12V levels. The following two circuits can achieve this function:
Circuit Description:
(1) The bias voltage must be lower than the I/O port output voltage. Only the bias voltage is lower than the I/O driving voltage. When the I/O output is high, the three-stage transistor is in the off state.
(2) This circuit is suitable for low speed circuits.
Antenk box header connector,Those products are used in more or less every known application within computer-, industrial-, telecommunication and specific automotive markets. This product technology allows cost effective connections between printed circuit boards based on removable or permanent connections based on a longterm proofed way of assembly. box header connectors are available with the traditionally used pitch of 2.54mm and the pitch of 2.00mm,1.27mm.
Antenk Box header/Ejector header Description and Application:
Box header/ ejector header connector, With DIP straight/vertical, SMT,Right angle, 2.54pitch, 2.0pitch, 1.27pitch,
The commonly used Pin ways have 6P,8P,10P,14P,16P,20P, 24P,26P,30P,34P, 40P,50P,64P.
Box header/ ejector header and IDC Flat Cable connectors are two of the most commonly used connectors. Box headers can be found in nearly all electronic equipments.
This is a IDC product which allows cost effective connections between circuit boards based on permanent connection (using transition connector) or removable connection
(Using for IDC flat cable connectors).
Box header
Ejector header
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