HD74LVC574A - Hitachi Semiconductor

HD74LVC574A Octal D-type Flip Flops with 3-state Outputs

The HD74LVC574A has eight edge trigger D type flip flops with three state outputs in a 20 pin package. Data at the D inputs meeting set up requirements, are transferred to the Q outputs on positive going transitions of the clock input. When the clock input goes low, data at the D inputs will be retained at the outputs until clock input returns high again. Wh.

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• VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) All outputs VOUT (Max.) = 5.5 V (@VCC = 0 V or output off state) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) High output current ±24 mA (@VCC = 3.0 V to 5.5 V) HD74LVC574A Function Table Inputs OC L L L H H: L: X: Z: ↑: Q0 : CK ↑ ↑ L X D H L X X Output Q H L Q0 Z High level Low level Immaterial High impedance Low to high transition Level of Q before the indicated steady input conditions were established. Pin Arrangement OC 1 1D 2 2D 3.