Artifact Details

Title

Calculator integrated circuit

Catalog Number

102757878

Type

Physical Object

Date

circa 1972

Manufacturer

Texas Instruments Incorporated (TI)

Identifying Numbers

Model number TMC 0501 Printed on top
Other number 0501 45 Printed on bottom
Other number E 7345 Printed on top

Dimensions

overall: 1/4 in x 5/8 in x 1 3/8 in

Description

Object is a 28-pin dual inline packaged integrated circuit. The TMC0501 Arithmetic chip contains a decimal ALU (Arithmetic and Logic Unit) with a accuracy of 13 digits. Each result is represented in 16 digits, 13 digits for the mantissa, 2 digits for the exponent and one digit for the signs and overflow bits. There are in total 5 registers of 16 digits for storage purposes.
Additional functions of the TMC0501 include the segment outputs of the display and the keyboard scanning input. Both the scanning of the display digits and the keyboard is done by the SCOM companion chip.

Credit

Gift of Michael J. Cochran

Lot Number

X7799.2016