Dictionary H

HIC

See "humidity indicator card" and "integrated circuit, hybrid".

References:

hierarchical description

A description containing two or more nested levels of primitives.

References:

JESD12-1B, 8/93
JESD99B, 5/07

hierarchical layout

The layout of a design that exists in multiple hierarchical levels.

References:

JESD12-1B, 8/93
JESD99B, 5/07

high-impedance-state output current (IOZ)

The current into the output terminal with input conditions applied that, according to the product specification, will establish a high-impedance state at the output.

References:

JESD99B, 5/07

high-level input current (IIH)

The current into an input terminal when a specified high-level voltage is applied to that input.

References:

JESD99B, 5/07

high-level input voltage, "A" limit (VIHA); high-level input voltage, maximum (VIHmax)

The most positive (least negative) value of high-level input voltage for which operation of the logic element within specification limits is to be expected.

References:

JESD99B, 5/07

high-level input voltage, "B" limit (VIHB); high-level input voltage, minimum (VIHmin)

The least positive (most negative) value of high-level input voltage for which operation of the logic element within specification limits is to be expected.

References:

JESD99B, 5/07

high-level output current (IOH)

The current into the output terminal with input conditions applied that, according to the product specification, will establish a high level at the output.

References:

JESD99B, 5/07

high-level output voltage (VOH)

The voltage level at an output terminal with input conditions applied that, according to the product specification, will establish a high level at the output.

References:

JESD99B, 5/07

high-side driver

A source driver whose primary connection within the integrated circuit is through an active device to a positive supply voltage.

References:

JESD99B, 5/07

high-speed carry

In parallel addition, any procedure for speeding up the processing of carries. (Ref. IEC 824.)

EXAMPLE Standing-on-nines carry.

References:

JESD100-B, 12/99

histogram

A graph obtained by dividing the range of the data set into equal intervals and plotting the number of data points in each interval against the interval number.

References:

EIA-557-A#, 7/95

hold (input) signal

A signal that causes a central processing unit to stop its activity and to relinquish control over the bus until the signal is removed. (Ref. IEC 824.)

References:

JESD100-B, 12/99

hold time, (input) (th)

The time interval during which a signal is retained at a specified input terminal after an active transition occurs at another specified input terminal.

NOTE 1 The input hold time is the actual time interval between two signal events and is determined by the system in which the digital circuit operates. A minimum value is specified that is the shortest interval for which correct operation of the digital circuit is to be expected.

NOTE 2 The input hold time may have a negative value, in which case the minimum limit defines the longest interval (between the release of the signal and the active transition) for which correct operation of the digital circuit is to be expected.

References:

JESD99B, 5/07
JESD100B.01, 12/02

hold time, output

Synonym for "valid time, output data-".

References:

JESD100-B, 12/99

hole (1) (in a package)

A depression in the surface, the bottom of which is not visible.

(2) (in a semiconductor material): A mobile vacancy in the electronic valence structure that acts like a positive electron charge with a positive mass.

References:

JESD27, 8/93

IEEE Std 100

homogeneous material

A material of uniform composition throughout that cannot be mechanically separated into different materials.

NOTE 1    Examples of “homogeneous materials” are certain types of plastics, ceramics, glass, metals, alloys, paper, board, resins, and coatings.

NOTE 2    Methods of mechanical separation include cutting, crushing, grinding, and abrasive processes.

References:

JIG-101 Ed 2.0, 4/09
J-STD-609, 5/07

host system

A programming system as described in the purpose and scope of JESD32.

References:

JESD32, 6/96

humidity indicator card (HIC)

A card on which a moisture-sensitive chemical is printed such that it will undergo a significant, perceptible change in color (hue), typically from blue (dry) to pink (wet) when the indicated relative humidity is exceeded.

NOTE The HIC is packed inside the moisture-sensitive bag, along with the desiccant, to aid in determining the level of moisture to which the moisture-sensitive devices have been subjected.

References:

J-STD-033B#, 10/05

hybrid integrated circuit

See "integrated circuit, hybrid".

References:

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