Threaded Nut Coupling Connector. An input/output electronic interconnect device similar to a BNC connector but with threaded couplings.
See Time Delay - Air.
A switch that is operated by a projecting cylindrical or rectangular angle.
The front end portion of a terminal that terminates to screw, stud, or blade style terminal blocks.
Bare copper wires, twisted together, then coated with pure tin, plus insulation.
The physical or logical configuration of a network or system. The most common topologies are the bus, ring, and star. The term has built-in ambiguities because logical bus topologies can be configured as stars, then the topology is logical bus, physical star.
A coil or transformer wound on a doughnut shaped core.
Terminal Position Assurance. A secondary lock on the housing to ensure the terminal is fully seated in the housing and will not back out.
The circuit or signal paths on a printed circuit board.
When more than one color-coding stripe is required, the first (widest) stripe is the base stripe; the other, usually narrower, stripes are termed tracer stripes.
A machine that feeds connector pins from a vibrator onto a track where they align before being inserted one row at a time. The row may be one connector or a few connectors stacked side by side. The speed of track machines ranges from 800-2000 cycles per hour and the actual rate of production depends on the stacking.
The formation of contaminants on the surface of insulating materials due to arcing. Tracking can be either a conducting or non-conducting path left after the arcing stops.
A device that can transmit and receive signals.
A device for transforming mechanical energy to electrical energy, or for transforming electrical energy to mechanical energy, such as in microphones and loudspeakers, but not motors or generators.
A Premium line product that holds a transducer (piezoelectric) device.
The internal impedance of a conductor is commonly referred to as Surface Impedance (Zs). If the conductor is a protective shield component (for noise immunity) of a given cable construction, the surface impedance is commonly referred to as the Transfer Impedance (Zt) and defined as the ratio of the axial voltage drop along the cable length or surface to the total current enclosed.
It is also a measure of the shielding effectiveness of shield performance, preventing the penetration of external noise into the cable.
Device used to increase or decrease AC voltage.
The solid-state junction transistor is an active circuit element or device, current-controlled, which can significantly amplify electronic signals; as opposed to the bulky unreliable vacuum tubes of the past, voltage-controlled in contrast.
The transistor is typically made using n- , and/or p-types of a doped element (Group IVA elements of the Periodic Table such as silicon and germanium) bonded together so as to create junctions (termed depletion layers) or interfacial zones between the different types that give them their electrical properties of amplification and control.
See also Carrier, Majority, Carrier, Minority, Semiconductor Material, Diode.
A device for holding transistors.
Transistor-to-Transistor Logic Signal (TTL)
A digital electronic signal used in electronic circuits.
LSTTL means low power-high speed TTL.
A connector that accepts cable at one end and is terminated and then soldered directly to the PCB. The connector cannot be disconnected.
Transfer of electric energy from one location to another through conductors or by radiation or induction fields. The transfer always is accompanied by energy loss, which is inversely proportional to the efficiency of the medium through which transmission occurs.
Two or more transmission lines. If the structure is flat, it is sometimes called flat transmission cable to differentiate it from a round structure such as a jacketed group of coaxial cables.
See also Transmission Line.
The ratio of the transmitted power, transmitted through an interconnect or component, to the incident original power. The sum of the transmission and the reflection coefficients, respectively, always adds to equal 1.
See also Reflection Coefficient.
An arrangement of two or more conductors separated or spaced uniformly apart by/or within a dielectric material of uniform dielectric constant. The arrangement of a constant, uniform cross-section constitutes a conductive path or a waveguide used to transfer signal electromagnetic energy and confine it to the line to prevent loss of energy from one point to another.
A decrease or loss in power during the transmission of energy from one point to another.
The net or effective power transmitted through an interconnect or component.
See also Transmission Coefficient.
In fiber optics, a device that changes an electronic signal into light energy.
The distance a membrane switch button can be depressed.
A short friction-fit peg on an SL header used to hold the connector through solder processing. A tri-peg may or may not protrude beyond the thickness of the PCB.
A semiconductor memory circuit that has output that can be made to conform to one of three possible logic states: 0, 1, or undefined.
A thyristor that can be triggered into conduction in either direction. Terminals are called "main terminal 2," "main terminal 1", and "gate." Formally known as "bidirectional triode thyristor."
A double-shielded transmission line or cable of high noise immunity, such as a coaxial design with an outer secondary or auxiliary shield enclosing the main coaxial cable. For noise-immunity effectiveness, this design terminates the secondary shield to a different ground (earth or frame ground) compared with that of the inner primary shield which is terminated to board- or signal-ground.
Noise generated in a shielded cable due to variations in capacitance between shielding and conductor as the cable is flexed, caused by the creation of static electricity via 'frictional' interaction between materials of construction during flexing of the cable.
A variation of the Premium line
KK double cantilever terminal with two additional contacts in the vertical plane from the main contact interface, for a total of three contact points.
A connector that does not require any holes to be drilled through the PCB to mount the connector's PC tails, and whose materials can survive the high temperatures of the surface mount process.
See also SMT.
See Feeder Cable.
Two-conductor rubber insulated and jacketed tinsel cord. Light duty, attached to an appliance of 50 W or less. 125 in rating.
Thin Small Outline Package
See SIMM.
Same as TS, all thermoplastic-insulation and jacket.
Polyvinyl chloride insulation and sheath.
See Transistor-to-Transistor Logic Signal.
Teletype or teletypewriter
Piece of cylindrical insulating material that slips over the point of electrical connection.
An accessory attached to the rear of a connector, usually metallic, used to extend the shell far enough to support a sealing gland or to give mechanical support for a cable or wire harness.
Terminal manufactured from tubing rather than from flat stock.
A U-shaped female contact with tines that resembles a tuning fork.
The ratio of the number of turns in a transformer's primary winding to the number of turns in the secondary winding.
A terminal block design that combines top-to-bottom feed-through with bottom-side circuit isolation.
A device attached to a crimping tool that has multiple positions that can be rotated to position a specific conduction barrel between the indentors.
Thermoplastic vinyl jacketed building wire. Moisture resistant 60° C.
A pair of insulated conductors twisted and/or sheathed or held together mechanically and not identifiable from each other in a common covering.
A transmission line that has two parallel conductors separated by insulating material. Line impedance is determined by the diameter and spacing of the conductors and the insulating material and is usually 300 ohms for television receiving antennas. Also called twinline.
A pressure type connector that joins two branch circuit-size conductors.
Two insulated wires, usually 22 AWG or 24 AWG, wrapped around each other. May be shielded or unshielded. If unshielded, may be either voice grade or data grade. Twisted-pair is easier to install than coaxial cable, which is one of the reasons it is so popular these days.
A parallel connector in which the contact between the conductors is obtained by forming a spiral twist in the connector and conductors after they are assembled.
In one position, moving contacts complete one circuit, in the other position, contacts complete another separate circuit.
An interconnect device in which one mating piece is permanently mounted to the PCB (generally by soldering), and the other is attached to equipment. Developed for high density or high pin count connectors. Particularly suited for use with PCBs subject to strong shock or vibration.
A contact made of two or more separate parts formed into a single part by swedging, brazing, or other means.