The MC14566B industrial time base generator is constructed with MOS Pchannel and Nchannel enhancement mode devices in a single monolithic structure. This device consists of a divideby10 ripple counter and a divideby5 or divideby6 ripple counter to permit stable time generation from a 50 or 60 Hz line. By cascading this device as divideby60 counters, seconds and minutes can be counted and are available in BCD format at the circuit outputs. An internal monostable multivibrator is included whose output can be used as a reset or clock pulse providing additional frequency flexibility. Also a pin has been included to allow divideby5 counting for generating 1.0 Hz from European 50 Hz line. Pin 11 = VDD will cause 5.