Glossary Terms and Definitions Beginning with the Letter E

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E See Volt
E1 Wide-area, digital transmission scheme, used predominantly in Europe, that carries data at a rate of 2.048Mbps. E1 lines can be leased for private use from common carriers.
E2 A line that carries four multiplexed E1 signals with a data rate of 8.448Mbps.
E3 Wide-area, digital transmission scheme used predominantly in Europe that carries data at a rate of 34.368Mbps. E3 lines can be leased for private use from common carriers.
EAM Electro-Absorption Modulators: Chip-level modulation devices often integrated into hybrid transponder devices, alongside lasers.
ECB Electrically controlled birefringence
ECL Emitter-coupled logic
ECM Electret capacitor microphone
EconoReset The simplest form of microprocessor supervisory circuit, it monitors the power supply for the microprocessor and provides only a power-on reset function.
EconOscillator Low-cost, surface-mount, CMOS oscillator family from Maxim. EconOscillators replace crystal-based oscillators. They need no external crystals or timing components.

See: EconOscillator product index for additional descriptions, features, etc.

EconOscillator is a trademark of Maxim Integrated
EDFA Erbium-doped fiber-optical amplifier
EDGE Enhanced Data Rates for GSM Evolution: An enhanced modulation technique designed to increase network capacity and data rates in GSM networks. EDGE should provide data rates up to 384Kbps.
EEPROM Electrically erasable programmable read-only memory
Effective Number Of Bits See ENOB
Effective Series Inductance See ESL
Effective Series Resistance See ESR
EFT Electrical fast transient
EIA Electronic Industries Alliance: Among other things, the EIA sponsors electrical and electronic standards.
EIA-422 See RS-422/RS-485
EIA-485 See RS-422/RS-485
EIA-JEDEC Electronic Industries Association/Joint Electron Device Engineering Council
EIA232 See RS-232
Electric Vehicle Service Equipment See EVSE
Electro-Absorption Modulator See EAM
Electromagnetic Interference See EMI
Electromotive Force See Volt
Electronic Digital Rheostat See Dallastat
Electronic Industries Alliance See EIA
Electrostatic Discharge See ESD
Embedded System A system in which the computer (generally a microcontroller or microprocessor) is included as an integral part of the system.

Often, the computer is relatively invisible to the user, without obvious applications, files, or operating systems. Examples of products with invisible embedded systems are the controller that runs a microwave oven or the engine control system of a modern automobile.

EMC Electromagnetic Compatibility: The ability of electronic equipment to be a "good electromagnetic neighbor": It neither causes, nor is susceptible to, electromagnetic interference (within the limits of applicable standards).
EMF See Volt
EMI Electromagnetic Interference: Unwanted noise from electromagnetic radiation.

See: EMI Reduction Solutions page.

End Point Behavior of the device at the limit of temperature or voltage.
ENDEC Encoder/Decoder
Energy Harvesting Energy harvesting (also known as power harvesting or energy scavenging) is the process in which energy is captured from a system's environment and converted into usable electric power. Energy harvesting allows electronics to operate where there's no conventional power source, eliminating the need to run wires or make frequent visits to replace batteries.

An energy harvesting system generally includes circuitry to charge an energy storage cell, and manage the power, providing regulation and protection.

Energy source examples include light (captured by photovoltaic cells), vibration or pressure (captured by a piezoelectric element), temperature differentials (captured by a thermo-electric generator) radio energy (captured by an antenna); and even biochemically produced energy (such as cells that extract energy from blood sugar).

More: Application note 5259, "Energy Harvesting Systems Power the Powerless"

Energy Scavenging See Energy Harvesting
Enhanced Data Rates For GSM Evolution See EDGE
ENOB Effective Number of Bits: An indication of the quality of an analog-to-digital converter (ADC). The measurement is related to the test frequency and the signal-to-noise ratio.
EP See Exposed Pad
EPON Ethernet (-based) passive optical network
EPROM Erasable programmable read-only memory
Equivalent Series Inductance See ESL
Equivalent Series Resistance See ESR
ERC Extinction ratio control
Error Vector Magnitude See EVM
ESBGA Enhanced Super Ball-Grid Array (trademark of Amkor/Anam)
ESD Electrostatic Discharge: Release of stored static electricity. Most commonly: The potentially damaging discharge of many thousands of volts that occurs when an electronic device is touched by a charged body.

See the following application notes that describe how ESD is generated, how it damages electronic systems, human body and machine models for testing, IEC compliance levels, and design approaches.

ESD Protected See ESD Protection
ESD Protection Devices added to input and output pins on an IC to protect the internal circuitry from the damaging effect of electrostatic discharge.

See: ESD Overview.

ESF Extended Superframe: A DS1 framing format in which 24 DS0 times lots, plus a coded framing bit are organized into a frame which is repeated 24 times to form a superframe.
ESL Effective/Equivalent Series Inductance is the parasitic inductance in a capacitor or resistor.
ESP Extended stack pointer
ESR Effective Series Resistance (or Equivalent Series Resistance or ESR) is the resistive component of a capacitor's equivalent circuit.

A capacitor can be modeled as an ideal capacitor in series with a resistor and an inductor. The resistor's value is the ESR.

Ethernet A family of network protocols based on asynchronous frames. The Ethernet framing structure provides a flexible payload container with basic addressing and error detection mechanisms.
Euroconnector See SCART
EV 1. Electric Vehicle.

2. Evaluation, as in "EV Kit."

EV Kit See Evaluation Kit
Eval Kit See Evaluation Kit
Evaluation Kit Evaluation Kit (EV Kit, Development Kit): A printed circuit board with an integrated circuit and support components to produce a working circuit for evaluation and development. Most Evaluation Kits are fully assembled and tested.

EVKIT: Part number suffix used for Maxim Evaluation Kits.

Dallas Semiconductor, now owned by Maxim, used the term "development kit."

See the list of Maxim Evaluation Kits and EVKit software.

Evaluation System See EVSYS
EVKIT See Evaluation Kit
EVM Error Vector Magnitude: A measure of the difference between the (ideal) waveform and the measured waveform. The difference is called the error vector, usually referred to with regard to M-ary I/Q modulation schemes like QPSK, and shown on an I/Q "constellation" plot of the demodulated symbols. Also see: "Phase Noise and TD-SCDMA UE Receiver," www.maximintegrated.com/an1824
EVSE EVSE is an abbreviation for Electric Vehicle Service Equipment, referring to a charging station.

See: Application Note 5348: G3-PLC Technology Finally Makes Charging an Electric Vehicle Smart

EVSYS Evaluation System: Evaluation kits that also include an interface board for connecting to a personal computer and Windows-based EVKit software.

EVSYS: Suffix used for Maxim Evaluation System part numbers.

Exposed Pad Offered in some packages to improve thermal dissipation or lower the impedance of the ground connection. Normally not electrically isolated, it typically needs to be connected to a ground or power plane, depending on the device.
Exposed Paddle See Exposed Pad
Extended Superframe See ESF