Product Description
The MC14521B consists of a chain of 24 flip-flops with an input circuit that allows three modes of operation. The input will function as a crystal oscillator, an RC oscillator, or as an input buffer for an external oscillator. Each flip-flop divides the frequency of the previous flip-flop by two, consequently this part will count up to 2
24 = 16,777,216. The count advances on the negative going edge of the clock. The outputs of the last seven-stages are available for added flexibility.
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Features |
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- All Stages are Resettable
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- Reset Disables the RC Oscillator for Low Standby Power Drain
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- RC and Crystal Oscillator Outputs Are Capable of Driving External Loads
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- Test Mode to Reduce Test Time
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- VDD' and VSS' Pins Brought Out on Crystal Oscillator Inverter to Allow the Connection of External Resistors for Low-Power Operation
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- Supply Voltage Range = 3.0 Vdc to 18 Vdc
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- Capable of Driving Two Low-power TTL Loads or One Low-power Schottky TTL Load over the Rated Temperature Range.
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- Pb-Free Packages are Available
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