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Evaluation of CMOS timer integrated circuits for cryogenic use

โœ Scribed by T. Haruyama; R.K. Kirschman

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
817 KB
Volume
31
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

555' and '551'

type CMOS timer integrated circuits have been evaluated for cryogenic use as resistor-capacitor (R-C) oscillators. First, the behaviour of 28 different integrated circuits (ICs) was compared between room and liquid nitrogen temperatures, under a variety of operating conditions. The behaviour of six of these ICs was then measured as a function of temperature over the range 80-320 K. All circuits operated reasonably well down to 80 K, with frequency variations within = ยฑ 2% at = 3 kHz. Tests on seven ICs at liquid helium temperature showed that they were not suitable for use at this temperature.

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