TI SN74HCT574NSR

These octal edge-triggered D-type flip-flops feature 3-state outputs designed for bus driving applications. The HCT574 device is particularly suited for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops accept input data on the low-to-high transition of the clock (CLK) input. The buffered output enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic level) or a high-impedance state. In the high-impedance state, the outputs neither significantly load nor drive the bus lines. The high-impedance state combined with enhanced drive capability allows bus lines to be driven without interface or pull-up components. OE does not affect the internal operation of the flip-flops. While the outputs are in the high-impedance state, old data can be retained or new data can be entered.

• Operating voltage range: 4.5V to 5.5V
• High-current three-state non-inverting outputs for direct bus driving or up to 15 LSTTL loads
• Low power consumption, I_CC max 80μA
• t_pd typical = 22ns
• Output drive ±6mA at 5V
• Low input current, max 1μA
• TTL-compatible inputs
• Bus-structured pinout