HD74ALVCH162374

HD74ALVCH162374 16-bit Edge triggered D-type Flip Flops with 3-state Outputs ADE-205-180B (Z) Preliminary 3rd. Edition October 1997 Description The HD74ALVCH162374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. It can be used as two 8-bit flip flops or one 16-bit flip flop. On the positive transition of the clock (CLK) input, the Q outputs of the flip flop take on the logic levels set up at the data (D) inputs. The output enable ( OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high impedance state. In the high impedance state, the outputs neither load nor drive the bus lines significantly. The high impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components. OE does not affect internal operations of the flip flops. Old data can be retained or new data can be entered while the outputs are in the high impedance state. Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic level. All outputs, which are designed to sink up to 12 mA, include 26 Ω resistors to reduce overshoot and undershoot. Features VCC = 2.3 V to 3.6 V 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 ±12 mA (@VCC = 3.0 V) Bus hold on data inputs eliminates the need for e...