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MaxLoader User’s Guide
118
will be applied to the device for the first vector. Then, each output will be
applied to the device for the first vector. This process will continue for each
vector and any errors will be reported.
TQF Thin Quad Flat Pack. Similar to QFP but with a lower profile and physically
smaller in length and width.
TSOP Thin Small Outline Package. A surface-mount package with fine-pitch leads
(usually 0.025 inch pitch) on two sides. This package is very low profile and
commonly available in a reverse (mirror image) pin out used to simplify
circuit board layout; usually 32 to 44 pins.
UV Erasable The characteristic of an EPROM that allows it to be erased with exposure to
short –wave ultra-violet light. This high-energy light can discharge the
floating-gate transistor cells that store bits in an EPROM. The most common
source of such light is a mercury vapor tube much like an ordinary
fluorescent tube, but without the phosphor that turns the UV light emitted by
the mercury into visible light. The light from ordinary fluorescent lamps or
sunlight generally takes years to erase an EPROM. All UV erasable parts
have a quartz windowed ceramic package that allows exposure with UV light.
Verify Reading a programmable device and comparing its contents to the desired
pattern for that device. This is a go/no-go test – it does not report what the
discrepancies are. See also: compare.
Word width The number of output pins that a memory device has. The most common size
for EPROMs is byte wide (8 bits) and “word” wide, or 16 bits. It can also
refer to the aggregate width of several memory devices used in a set.