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Artifact Details

Title

Calculator integrated circuit

Catalog Number

102757880

Type

Physical Object

Description

Object is a 28-pin dual inline packaged integrated circuit. The TMC0521 Scanning Read Only Memory SCOM contains 1k*13 instruction memory and 16*16 digits constants.
Additional functions of the TMC0521 include scanning of the display digit driver outputs and the keyboard.

Date

circa 1973

Manufacturer

Texas Instruments Incorporated (TI)

Identifying Numbers

Model number	TMS0521 NL	Printed on the top
Other number	0521 44	Printed on the bottom
Other number	B7344	Printed on the top

Dimensions

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

Credit

Gift of Michael J. Cochran

Lot Number

X7799.2016