IC Phoenix
 
Home ›  MM103 > MC14081BDR2-MC34072VDR2,Quad 2-Input AND Gate
MC14081BDR2-MC34072VDR2 Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
MC34072VDR2ONN/a1592avaiSingle Supply 3V to 44V, Dual Op Amp
MC14081BDR2ONN/a2400avaiQuad 2-Input AND Gate
MC14081BDR2N/a770avaiQuad 2-Input AND Gate


MC14081BDR2 ,Quad 2-Input AND Gate
MC14081BDR2 ,Quad 2-Input AND Gateblock diagram of a center-tapped step-ping motor plus control switches, inductive clampdiodes, resi ..
MC14081BDR2 ,Quad 2-Input AND Gate
MC14081BDT ,B-Suffix Series CMOS Gates23 INPUT 2 INPUTMC14001B SeriesÎÎÎÎÎ
MC14081BDTR2 ,Quad 2-Input AND GateC"MOTOROLASemiconductor Products Inc.AN-876Application NoteUSING POWER MOSFETS INSTEPPING MOTOR CON ..
MC14081BF ,B-Suffix Series CMOS GatesThe B Series logic gates are constructed with P and N channelenhancement mode devices in a single m ..
MC68EN360AI25VL , MC68360 QUad Integrated Communication Controller
MC68EN360AI25VL , MC68360 QUad Integrated Communication Controller
MC68EN360CAI25L , Up to 32-Bit Data Bus (Dynamic Bus Sizing for 8 and 16 Bits), Up to 32 Address Lines (At Least 28 Always Available)
MC68EN360RC33 ,QUad Integrated Communications Controller Users Manual* MOTOROLAMC68360QUad IntegratedCommunications ControllerUser’s ManualMotorola reserves the right t ..
MC68HC000CFN10 ,Microprocessor, sixteen 32-bit data and address registers, 16-Mbyte direct addressing range, memory-mapped input/output (I/O), 14 addressing modes, 10MHzfeatures:• MC68HC001/MC68EC000/MC68SEC000— Statically selectable 8- or 16-bit data bus• MC68HC000/M ..
MC68HC000CFN12 ,Microprocessor, sixteen 32-bit data and address registers, 16-Mbyte direct addressing range, memory-mapped input/output (I/O), 14 addressing modes, 12MHz Order this document by M68000UMAD/ADCommunications and AdvancedConsumer Technologi ..


MC14081BDR2-MC34072VDR2
Quad 2-Input NAND Gate
AN1016/D
Infrared Sensing
and Data Transmission
Fundamentals
Prepared by: Dave Hyder

ON Semiconductor
Field Applications Engineer
Many applications today benefit greatly from electrical
isolation of assemblies, require remote control, or need to
sense a position or presence. Infrared light is an excellent
solution for these situations due to low cost, ease of use,
ready availability of components, and freedom from
licensing requirements or interference concerns that may
be required by RF techniques. Construction of these
systems is not difficult, but many designers are not familiar
with the principles involved. The purpose of this
application note is to present a “primer” on those
techniques and thus speed their implementation.
THE GENERAL PROBLEM

Figure 1 represents a generalized IR system. The
transmitting portion presents by far the simplest hurdle. All
that needs to be accomplished is to drive the light source
such that sufficient power is launched at the intended
frequency to produce adequate reception. This is quite easy
to do, and specific circuits will be presented later.
Figure 1. Simplified IR Sensing/Data Transmission
System

The bulk of the challenge lies in the receiving area, with
several factors to consider. The ambient light environment
is a primary concern. Competing with the feeble IR
transmitted signal are light sources or relatively high
power, such as local incandescent sources, fluorescent
lighting, and sunlight. These contribute to the problem in
two ways. First, they produce an ambient level of
stimulation to the detector that appears as a dc bias which
can cause decreased sensitivity and, worst of all, saturation
in some types of detectors. Second, they provide a noise
level often 60 dB greater than the desired signal, especially
in the form of the 50 or 60 Hz power frequency. Also, recall
that the sensitivity of silicon photo detectors extends well
into the visible range. This sensitivity, albeit reduced,
causes severe interference since the sources in this region
are often of significant power, e.g., incandescent lighting
and sunlight. In addition to the visible component, both
produce large amounts of infrared energy, especially
sunlight.
Some IR applications are not exposed to this
competition, and for them dc excitation of the source may
be adequate. These include some position sensing areas
and slow data links over short distances.
But the bulk of IR needs require a distance greater than
30 cm, speeds greater than 300 baud, and exposure to
interfering elements. For these needs high–frequency
excitation of the source is necessary. This ac drive permits
much easier amplification of the detected signal, filtering
of lower frequency components, and is not difficult to
produce at the driving end. Optical filtering for removal of
the visible spectrum is usually required in addition to the
electrical, but this too is quite simple.
A WORD ABOUT DETECTORS

Figure 2 shows the three basic detection schemes: a
phototransistor, a Darlington phototransistor, and a
photodiode. All three produce hole–electron pairs in
response to photons striking a junction. This is seen as a
current when they are swept across the junction by the bias
voltage, but they differ greatly in other respects.
The most sensitive is the Darlington. The penalties are
temperature drift, very–low tolerance to saturation, and
speeds, limited to about 5 kHz (usually much less). Next is
the single transistor, having similar penalties (but to a lesser
degree), with speeds limited to less than 10 kHz. Typically,
they are limited to less than half that number. These two
detectors normally find their use in enclosed environments,
where ample source intensity is available to provide large
voltage outputs without much additional circuitry (their
prime advantage). Their detection area is almost never
exposed to ambient light.
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED