MC14521BCP ,24-Stage Frequency DividerMAXIMUM RATINGS* (Voltages Referenced to V )SSÎÎSymbol Parameter Value UnitV DC Supply Voltage – 0. ..
MC14521BCPG , 24−Stage Frequency Divider
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MC14521BCL-MC14521BCP
24-stage frequency divider
" !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 224 = 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. All Stages are Resettable Reset Disables the RC Oscillator for Low Standby Power Drain RC and Crystal Oscillator Outputs Are Capable of Driving External
Loads Test Mode to Reduce Test Time VDD′ and VSS′ Pins Brought Out on Crystal Oscillator Inverter to Allow
the Connection of External Resistors for Low–Power Operation Supply Voltage Range = 3.0 Vdc to 18 Vdc Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load over the Rated Temperature Range.
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ÎÎÎ Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/ C From 65 C To 125C
Ceramic “L” Packages: – 12 mW/ C From 100 C To 125C
BLOCK DIAGRAM 11 12 13 14 15 1
IN 1
RESET 3 4
OUT 1 VDD′
VSS′
OUT2
SEMICONDUCTOR TECHNICAL DATA
