HD74HC4024

HD74HC4024 7-stage Binary Counter Description The HD74HC4024 is a 7-stage counter. This device is incremented on the falling edge (negative transition) of the input clock, and all its output is reset to a low level by applying a logical high on its reset input. Features High Speed Operation: tpd (Clock to Q1) = 14 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Clock L L H H Reset L H L H L H L H Outputs State No change All outputs are low No change All outputs are low No change All outputs are low Advance to next state All outputs are low HD74HC4024 Pin Arrangement Clock Reset Q7 Q6 Q5 Q4 GND 1 2 3 4 5 6 7 (Top view) R Q7 Q6 Q5 Q4 Q3 C 14 13 Q1 Q2 12 11 10 9 8 VCC NC Q1 Q2 NC Q3 NC Block Diagram Clock C Q C Q C Q C Q R Reset Q R Q R Q R Q Q1 Q2 Q6 Q7 2 HD74HC4024 DC Characteristics Ta = 25°C Item Input voltage Symbol VIH Ta = –40 to +85°C Max — — — 0.5 1.35 1.8 — — — — — 0.1 0.1 0.1 0.33 0.33 ±1.0 40 µA µA I OL = 4 mA I OL = 5.2 mA Vin = VCC or GND Vin = VCC or GND, Iout = 0 µA V I OH = –4 mA I OH = –5.2 mA Vin = VIH or VIL I OL = 20 µA V Vin = VIH or VIL I OH = –20 µA V Unit V Test Conditions VCC (V) Min Typ Max Min 2.0 4.5 6.0 1.5 — 3.15 — 4.2 — — — — — — — — — — 0.5 1.5 3.15 4.2 — VIL 2.0 4.5 6.0 1.35 — 1.8 — 1.9 4.4 5.9 4.13 5.63 — — — Output voltage VOH 2.0 4...