Pocket size integrated circuit logic analyzer

Claim 2

Unitary, self-contained, hand portable logic circuit checking equipment for testing an energized integrated circuit device while the device is mounted on a circuit board and thus incorporated into a digital logic electronic circuit, comprising a multiple contact head having a plurality of electrical contacts of number and arrangement to make simultaneous electrical connection with the lead pins of the integrated circuit device being tested; a body having distinct individual illuminable indicia, including a first indicia and a plurality of identical indicia, one set for each of said electrical contacts in excess of two contacts, each of said identical indicia representing the logic state of the corresponding pin of said integrated circuit device being tested; illuminating means for said indicia; and electronic circuitry interconnecting said illuminating means and said contacts and including a power circuit interconnecting the two said contacts which are adapted to make electrical connection with the power supply and ground lead pins of said device and the illuminating means associated with said first indicia; and signal circuits interconnecting said contacts other than said two contacts and the illuminating means for said indicia other than said first indicia, said signal circuit each interconnecting one contact and the illuminating means associated with the corresponding indicia set and including solid state electronics means responsive to the logic significant potential appearing at the corresponding pin and electrically connected to that contact to energize and cause operation of said illuminating means in response to the logic state of the corresponding pin of said integrated circuit device by means of power available in said power circuit and the potential at said pins whereby said first indicia is illuminated when the device is energized so that said plurality of identical indicia are illuminated in a pattern to indicate the digital logic status of said device at said lead pins other than the lead pins carrying power and ground.

Claim 3

The equipment of claim 1 wherein there are 14 said contacts arranged in an equipment head for mating registration with a 14 lead integrated circuit flat package device.

Claim 4

The equipment of claim 1 wherein there are 14 contacts arranged for mating with a 14 pin dual in-line digital logic integrated circuit device.

Claim 5

The equipment of claim 1 wherein there are 24 contacts arranged for mating with a 24 pin digital logic integrated circuit device.

Claim 6

The equipment of claim 1 wherein there are 16 contacts arranged for mating with a 16 pin digital logic integrated circuit device.

Claim 7

The equipment of claim 1 wherein said head is replaceable whereby the equipment may be used with devices of the same configuration but with different pins for power and ground.

Claim 8

A unitary, selfcontained, portable, hand held circuit logic analyzer for testing an integrated circuit device in its position of utilization without disturbing its physical and electrical relationship with its environment, comprising; a head shaped to fit said integrated circuit device and containing a pluRality of n + 2 electrical contacts of location and dimension to mate with the input and output lead pins of said device, said device having n logic pins, a power pin and a ground pin; an indicator face portion including n + 2 visual indicator positions; and a body portion interconnecting said head and said face portion and housing electrical circuit means for causing display of the digital logic status of said device at said indicator positions as detected by said electrical contacts from said pins; said indicator positions including distinguishing indicia to permit correlation of each said indicator position with one said electrical contact and one said pin and further including illuminating means containing lamp means associated with n + 1 of said positions to display signals indicating the digital logic status at n of said pins and indicating whether or not power is available at said power pin; said circuit means including n identical driving circuits connected to a common power terminal and to a common ground terminal and interconnecting n corresponding electrical contacts and illuminating means, each driving circuit including a lamp driver responsive to the logic state potential detected by said contact and to an operating current available at said power terminal to turn on, turn off and operate said lamp means responsive to said potential to create said signals, said circuit means also connecting said ground terminal to one said electrical contact located so as to register with the ground pin of said device and interconnecting said power terminal, the one said lamp means in excess of n and the one said electrical contact located to register with the power pin of said device, whereby said analyzer may be used to test an operating integrated circuit device and when applied to such integrated circuit device will indicate whether or not the device is under power and will indicate the logic status at each logic input and output to permit determination of whether said device is proper or defective.

Claim 9

A unitary, selfcontained, portable, hand held circuit logic analyzer for testing an integrated circuit device in its position of utilization without disturbing its physical and electrical relationship with its environment, comprising; a head shaped to fit said integrated circuit device and containing a pluRality of n + 2 electrical contacts of location and dimension to mate with the input and output lead pins of said device, said device having n logic pins, a power pin and a ground pin; an indicator face portion including n + 2 visual indicator positions; and a body portion interconnecting said head and said face portion and housing electrical circuit means for causing display of the digital logic status of said device at said indicator positions as detected by said electrical contacts from said pins; said indicator positions including distinguishing indicia to permit correlation of each said indicator position with one said electrical contact and one said pin and further including illuminating means containing lamp means associated with n + 1 of said positions to display signals indicating the digital logic status at n of said pins and indicating whether or not power is available at said power pin; said circuit means including n identical driving circuits connected to a common power terminal and to a common ground terminal and interconnecting n corresponding electrical contacts and illuminating means, each driving circuit including a lamp driver responsive to the logic state potential detected by said contact and to an operating current available at said power terminal to turn on, turn off and operate said lamp means responsive to said potential to create said signals, said circuit means also connecting said ground terminal to one said electrical contact located so as to register with the ground pin of said device and interconnecting said power terminal, the one said lamp means in excess of n and the one said electrical contact located to register with the power pin of said device, whereby said analyzer may be used to test an operating integrated circuit device and when applied to such integrated circuit device will indicate whether or not the device is under power and will indicate the logic status at each logic input and output to permit determination of whether said device is proper or defective.

Claim 10

The analyzer of claim 7 wherein there are 14 said electrical contacts and said head and contacts will mate with a 14 pin SUHL type integrated circuit package.

Claim 11

The analyzer of claim 7 wherein said body portion consists in part of flexible lead wires between said head and the remainder of said body portion.