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The Art of Electronics, by Paul Horowitz and Winfield Hill. The third edition was published on April 9, 2015. On p468 it states about the TPL5000

TPL5000/5100 - These impressive nanopower timers from Texas Instruments run from 1.8V to 5.5V, draw a meager 40 nA (yes, nanoamps!) and are 3-bit programmable

TPL5000 Credits: * Design: * Product definition: Matthieu Chevrier & Andras Kramer * Original idea: