HCC4047B Datasheet, PDF (10/15 Pages) STMicroelectronics – LOW-POWELOW-POWER MONOSTABLE/ASTABLE MULTIVIBRATOR

HCC/HCF4047B
the system (unless this capacitance can be
measured and taken into account). R must be much
larger than the COS/MOS ”ON” resistance in series
with it, which typically is hundreds of ohms. In addi-
tion, with very large values of R, some short-term in-
stability with respect to time may be noted.
The recommended values for these components to
maintain agreement with previously calculated for-
mulas without trimming should be :
TEST CIRCUITS
Quiescent Device Current.
C ≥ 100pF, up to any practical value, for astable
modes ;
C ≥ 1000pF, up to any practical value, for mono-
stable modes.
10KΩ ≤ R ≤ 1MΩ.
Input Voltage.
Input Current.
10/15