General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

.1-.2 METAL, STONE (QUARTZ) 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

3.3 cm

Width

1.7 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

Texas Instruments

Country

Singapore

State/Province

Unknown

City

Unknown

Context

Country

North America

State/Province

Unknown

Period

These types of IC chips used in the 1970s. (ref. 2)

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

To integrate active and passive semiconductor components in order to form a complete circuit.

Technical

Two early EPROM (eraseable programmable read-only memory) chips. The 1702 was the first commercially produced EPROM (early 1970s). It was followed by the 2708. Both are in ceramic dip packages with fused quartz windows for erasure with ultraviolet light. (ref. 2)

Area Notes

Unknown

Details

Markings

.1 "B1702A/ AM1702ADC/ 8 102FPP [logo ?]" printed in off-white on case..2 "TMS/ [Texas Instruments logo]/ 2708JL/ P7740" printed in off-white on case top. "02708A/41/ SINGAPORE" printed in black on underside of case.

Missing

None.

Finish

.1 Dark brown ceramic top; Silver metal midsection and pins. Gold plate visible in clear quartz viewing window. .2 Purple-brown ceramic top; Gold metal midsection and pins. Gold plate visible in clear quartz viewing window.

Decoration

N/A