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10 / 15 page September 1993 10 Philips Semiconductors Product specification Programmable ripple counter with oscillator; 3-state 74HC/HCT6323A AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Note to the 74HCT AC Characteristics 1. tPZH only applicable in the divide-by-1 mode and X1 must be HIGH. SYMBOL PARAMETER Tamb (°C) UNIT TEST CONDITION 25 −40 to 85 −40 to 125 VCC (V) VI OTHER MIN TYP MAX MIN MAX MIN MAX tPHL/tPLH propagation delay X1 to OUT divide-by-1 − 24 40 − 50 − 60 ns 4.5 Fig.7 S1 = GND S2 = GND tPHL/tPLH propagation delay X1 to OUT divide-by-2 − 29 50 − 62 − 75 ns 4.5 Fig.7 S1 = GND S2 = VCC tPHL/tPLH propagation delay X1 to OUT divide-by-4 − 35 60 − 75 − 90 ns 4.5 Fig.7 S1 = VCC S2 = GND tPHL/tPLH propagation delay X1 to OUT divide-by-8 − 40 70 − 87 − 105 ns 4.5 Fig.7 S1 = VCC S2 = VCC tPLZ/tPHZ 3-state output disable time MR to OUT − 21 35 − 43 − 52 ns 4.5 Fig.8 tPZ 3-state output enable time MR to OUT − 16 30 − 37 − 45 ns 4.5 Fig.8 tPZH 3-state output enable time MR to OUT − 22 38 − 47 − 57 ns 4.5 Fig.8 see note 1 tTHL/tTLH output transition time − 512 − 15 − 19 ns 4.5 Fig.7 tW clock pulse width X1, HIGH or LOW 10 6 − 12 − 15 − ns 4.5 Fig.7 tW master reset pulse width MR; LOW 16 8 − 20 − 24 − ns 4.5 Fig.9 trem removal time MR to X1 24 12 − 30 − 36 − ns 4.5 Fig.9 fmax maximum clock pulse frequency 50 85 − 40 − 33 − MHz 4.5 Fig.7 |
Số phần tương tự - 74HCT6323AD |
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Mô tả tương tự - 74HCT6323AD |
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