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CD4521B,pdf(TYPES)

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CD4521B consists of an oscillator secTIon and 24 ripple-carry binary counter stages. The oscillator configuraTIon (using IN1) allows design of either RC or crystal oscillator circuits. IN1 should be TIed either HIGH or LOW when not in use. A HIGH on the RESET causes the counter to go to the all-0’s state and disables the oscillator. The count is advanced on the negaTIve transition of IN1 (and IN2). A time-saving test mode is described in the Functional Test Sequence Table and in Fig. 6. The CD4521B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).
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