General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL (INCLUDING GOLD) AND 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

2.1 cm

Width

N/A

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

Motorola

Country

Malaysia

State/Province

Unknown

City

Unknown

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF IC MADE & PRESUMABLY USED IN 1970S- EARLY 1980S, AND POSSIBLY LATER.

Canada

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

Function

ENABLES DATA TO BE STORED AND RETRIEVED DIRECTLY TO SPECIFIC LOCATIONS AS LONG AS INTERNAL CAPACITORS ARE CHARGED AND DISCHARGED REGULARLY.

Technical

EXAMPLE OF EARLY DYNAMIC RAM CHIP, THE MOST COMMON FORM OF RAM. IN THIS TYPE, EACH CELL HAS A CHARGE OR LACK OF CHARGE HELD IN SOMETHING SIMILAR TO AN ELECTRICAL CAPACITOR. A TRANSISTOR ACTS AS A GATE IN DETERMINING WHETHER THE VALUE IN THE CAPACITOR CAN BE READ OR WRITTEN. IT IS TYPICALLY THE QUICKEST RAM IS THE MOST COST EFFECTIVE. AND HAS THE HIGHEST DENSITY SINCE IT REQUIRES ONLY ONE TRANSISTOR PER MEMORY CELL. IT MUST BE REFRESHED APPROX. EVERY 10 M/S BECAUSE THE INTERNAL CAPACITORS SELF-DISCHARGE QUICKLY. DYNAMIC RAMS (DRAMS) TYPICALLY HAVE A SLOWER ACCESS SPEED THAN OTHER TYPES OF RAM. (REF. 3)

Area Notes

Unknown

Details

Markings

"MCM6616L3/ [Motorola logo]/ 7817" printed on gold plate on case top. "MALAYSIA/ EP AB" printed on underside of case.

Missing

NONE.

Finish

GOLD METAL PLATE & PINS; PURPLE-BROWN CERAMIC CASE.

Decoration

N/A