EDSTRG28PLCCCX datasheet(57/78 Pages) TI

57 / 78 page

SCOPE

3–3

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

scope

This guideline establishes the requirements for methods and materials used to protect electronic parts, devices,

and assemblies (items) that are susceptible to damage or degradation from electrostatic discharge (ESD). The

electrostatic charges referred to in this specification are generated and stored on surfaces of ordinary plastics,

most common textile garments, ungrounded person’s bodies, and many other commonly unnoticed static

generators. The passage of these charges through an electrostatic-sensitive part can result in catastrophic

failure or performance degradation of the part.

The part types for which these requirements are applicable include, but are not limited to the following:

D All metal-oxide semiconductor (MOS) devices; e.g., CMOS, PMOS, etc.

D Junction field-effect transistors (JFET)

D Bipolar digital and linear circuits

D Op-amps, monolithic microcircuits with MOS compensating networks, on-board MOS capacitors, or other

MOS elements

D Hybrid microcircuits and assemblies containing any of the types of devices listed

D Printed circuit boards and other types of assembly containing static-sensitive devices

D Thin-film passive devices

definitions

D Electrostatic discharge (ESD): A transfer of electrostatic charges between bodies at different electrostatic

potentials caused by direct contact or electrostatic field induction.

D Conductive material: Material having a surface resistivity of 105 Ω/square maximum.

D Static dissipative material: Material having a surface resistivity between 105 and 109 Ω/square.

D Antistatic material: Material having a surface resistivity between 109 and 1014 Ω/square.

D Surface resistivity: An inverse measure of the conductivity of a material and is the resistance of unit length

and unit width of a surface. Note: Surface resistivity of a material is numerically equal to the surface

resistance between two electrodes forming opposite sides of a square. The size of the square is immaterial.

Surface resistivity applies to both surface- and volume-conductive materials and has the dimension of

Ω/square.

D Volume resistivity: Also referred to as bulk resistivity, it is normally determined by measuring the resistance

(R) of a square of material (surface resistivity) and multiplying this value by the thickness (T).

D Ionizer: A blower that generates positive and negative ions, either by electrostatic means or from a

radioactive energy source in an airstream and distributes a layer of low-velocity ionized air over a work area

to neutralize static charges.

D Close proximity: For the purpose of this guideline, six inches or less.

device sensitivity per test circuit of Method 3015, MIL-STD-883C

D Devices are categorized according to their susceptibility to damage resulting from electrostatic discharges

(ESD).

EDSTRG28PLCCCX датащи(PDF) 57 Page - Texas Instruments