器件名称:
M74HC390RM13TR
功能描述:
Dual decade counter
文件大小:
371.55KB 共17页
简 介:
Description The M74HC390 is an high speed CMOS dual decade counter fabricated with silicon gate C2MOS technology. This dual decade counter contains two independent ripple carry counters. Each counter is composed of a divide by two and divide by five counter. The divide by two and divide by five counters can be cascaded to form dual decade, dual biquinary, or various combination up to a single divide by 100 counter. Order codes Part number M74HC390B1R M74HC390RM13TR P July 2006 7 8 9 10 11 Electrical characteristics . . Test circuit . . . . . . . . . . . . . . Waveforms . . . . . . . . . . . . . . Package mechanical data . . Revision history . . . . . . . . . 2/17 1.2 Pin description Table 1. Pin description Pin N° 1, 15 2, 14 3, 5, 6, 7 4, 12 Symbol 1 CLOCK A Clock input 2 CLOCK B 1 CLEAR 2 CLEAR Asynchrono 1QA to 1QD Flip flop ou 1 CLOCK A Clock input 2 CLOCK B 13, 11, 10, 9 2QA to 2QD Flip flop ou 8 16 GND Vcc Ground (0V Positive su 4/17 1. Output QA is connected to input CLOCK 2. Output QD is connected to input CLOCK Table 3. Truth table Inputs CLOCK A X CLOCK B X X X Note: 6/17 This logic diagram has not be used IGND PD Tstg TL DC VCC or ground current Power dissipation Storage temperature Lead temperature (10 sec) 1. 500mW at 65 °C; derate to 300mW by 10 6.1 Recommended operatin Table 5. Recommended operating Symbol VCC VI VO Top Supply voltage Input voltage Output voltage Operating temperature Para tr, tf Input rise and fall tim……
