General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL & CERAMIC MATERIALS OF CONSTRUCTION.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

5.2 cm

Width

1.6 cm

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Electricity & electronics

Sub-Category

N/A

Manufacturer

AKA

National Semiconductor

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

North America

State/Province

Unknown

Period

THIS INTEGRATED CIRCUIT PRODUCED IN 1977.

Canada

PART OF A COLLECTION OF EARLY SOLID STATE DEVICES ASSEMBLED BY THE DONOR AND HIS FATHER DURINGTHEIR CAREERS AS ELECTRONICS TECHNICIANS. (REF. 1)

Function

WHEN GROUPED TOGETHER, SEVERAL BIT-SLICE ICS CAN BE MADE TO FUNCTION LIKE A SINGLE MICROPROCESSOR, BUT FASTER AND GENERATING LESS HEAT. (REF. 3)

Technical

BIT-SLICE PROCESSORS ARE COMPOSED OF BIPOLAR TRANSISTORS, EACH OF WHICH CAN CARRY OUT A PORTION OF A MICROPROCESSOR'S CHORES. GROUPED OR CASCADED TOGETHER, SEVERAL BIT-SLICE ICS CAN FUNCTION LIKE A SINGLE MICROPROCESSOR. A SEPARATE CONTROL CHIP ROUTES ELECTRICAL SIGNALS TO THE BIT-SLICE CHIPS, AND KEEPS TRACK OF THE RESULTS. IN THE MID-1970S THE 2901 WAS THE MOST WIDELY USED BIT-SLICE PROCESSOR. IT WAS TYPICALLY USED IN LARGE & FAST COMPUTERS, OFTEN STRUNG TOGETHER TO FORM 32-BIT OPERATING SYSTEMS. (REF. 3)

Area Notes

Unknown

Details

Markings

"1" printed in black in lower left corner of case top; single black dot marked in upper left corner. "[logo] 7747/ IDM/ 2901ADC" printed in black on gold chip layer. "M-2901(A)/S" printed in black in underside.

Missing

NONE.

Finish

WHITE CERAMIC CASE HAS SILVER 20-PIN MOUNTING. UPPERMOST LAYER OF CHIP IS GOLD.

Decoration

N/A