CD4045B

The CD4045B is a timing circuit consisting of 21 counter stages, two output-shaping flip-flops, two inverter output drivers, and input inverters for use in a crystal oscillator.The CD4045B configuration provides 21 flip-flop counting stages, and two flip-flops for shaping the output waveform for a 3.125% duty cycle.

Features of the CD4045B are:(1)very low operating dissipation ; (2)output drivers with sink or source capability; (3)medium speed; (4)100% tested for quiescent current at 20 V; (5)5 V , 10 V and 15 V parametric ratings.

The absolute maximum ratings of the CD4045B can be summarized as:(1): DC supply-voltage range(VDD) is -0.5 V to +20 V(voltages referenced to Vss terminal); (2): input voltage range, all inputs is -0.5 V to VDD+0.5 V; (3): DC input current, any one input is ±10 mA; (4): operating temperature range(Ta) is -55 to +125; (5): storage temperature range(Tstg) is -65 to +150.