The 74HCT564N are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HCT564N are octal D-type flip-flops featuring separate D-type inputs for each flip-flop and inverting3-state outputs for bus oriented applications. A clock (CP) and an output enable (OE) input are common to all flip-flops. The 8 flip-flops will store the state of their individual D-inputs that meet the set-up and hold times requirements on the LOW-to-HIGH CP transition. When OE is LOW, the contents of the 8 flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high impedance OFF-state. Operation of the OE input does not affect the state of the flip-flops. The “564” is functionally identical to the “574” but has inverting outputs. The “564” is functionally identical to the “534”, but has a different pinning.
3-state inverting outputs for bus oriented applications
8-bit positive-edge triggered register
Common 3-state output enable input
Independent register and 3-state buffer operation
Output capability: bus driver
ICC category: MSI
20 pin DIP. Manufactured by Phillips.