HD74LV74A

HD74LV74A Dual D–type Flip Flops with Preset and Clear ADE-205-244 (Z) 1st Edition March 1999 Description The HD74LV74A has independent data, preset, clear, and clock inputs Q and Q outputs in a 14 pin package. The input data is transferred to the output at the rising edge of clock pulse CLK. Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook computers), and the low-power consumption extends the battery life. Features VCC = 2.0 V to 5.5 V operation All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All outputs VO (Max.) = 5.5 V (@VCC = 0 V) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C) Output current ±6 mA (@VCC = 3.0 V to 3.6 V), ±12 mA (@VCC = 4.5 V to 5.5 V) HD74LV74A Function Table Inputs PRE L H L H H H CLR H L L H H H CLK X X X ↑ ↑ ↓ D X X X H L X Outputs Q H L H* H L Q0 1 Q L H H*1 L H Q0 Note: H: High level L: Low level X: Immaterial ↑: Low to high transition ↓: High to low transition Q0:The level of Q immediately before the input conditions shown in the above table are determined. 1.: Q and Q will remain HIGH as long as Preset and Clear are Low, but Q and Q are unpredictable, if Preset and Clear go HIGH simultaneously. Pin Arrangement 1CLR 1 1D 1CLK 2 3 14 VCC 13 2CLR 12 2D 11 2CLK 10 2PRE 9 2Q 8 2Q 1PRE 4 1Q 1Q 5 6 GND 7 (Top view) 2 HD74LV74A Absolute Maximum Ratings Item Supply voltage range Input voltage range* 1 1, 2 Sy...