Texas Instruments TI-71 Digital Alarm Clock

Date of introduction:  June 1974 Display technology:  LED
New price:   Display size:  4
Size:  5.7" x 4.0" x 1.6"
 144 x 101 x 40 mm3
Weight:  9.0 ounces, 255 grams Serial No:  A71-1026194
Batteries:    Date of manufacture:  wk 09 year 1975
AC-Adapter:  110 V Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS3834, SN75492, RCA CA3082
Memories:   Displays:  TIL370
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 1.6M Bytes)

This TI-71 Electronic Digital Alarm Clock with its bright LED-display was introduced by Texas Instruments together with its sibling TI-70 already in 1974. While the TI-71 sports an alarm function, is the TI-70 a bare digital clock.

Both the TI-70 and TI-71 rely on the TMS3834 Digital Alarm Clock Chip and make use of an identical printed circuit board (PCB) with different options to distinguish between:

TI-70 (no Alarm) or TI-71 (Alarm)
50 Hz or 60 Hz operation
12-hour or 24-hour display format Hz
PM indicator or Flashing Colon

Don't miss the last watch sold by Texas Instruments.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.