74HC574D

The 74HC574 and 74HCT574 are 8-bit D-type flip-flops with 3-state outputs. The devices feature a clock (CP) and an output enable (OE̅) input. The flip-flops store the states present at their respective D inputs that meet the setup and hold time requirements of the low-to-high clock (CP) transition. A HIGH on OE̅ causes the outputs to assume a high-impedance OFF state. Operation of the OE̅ input does not affect the state of the flip-flops. Inputs include clamping diodes, enabling the use of current-limiting resistors to interface inputs to voltages exceeding VCC.

Key features

• Wide supply voltage range: 2.7 V to 6.0 V
• High noise immunity
• CMOS low power consumption
• Latch-up performance exceeds 250 mA
• Input levels: CMOS for 74HC574; TTL for 74HCT574
• Inputs and outputs on opposite sides of package for easy microprocessor interfacing
• Usable as input or output port for microprocessors and microcomputers
• Three-state non-inverting outputs for bus applications
• Common three-state output enable input
• Compliant with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.7 V to 6.0 V)
• ESD protection: HBM ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3500 V; CDM ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 2000 V
• Multiple package options
• Operating temperature range specified for -40 °C to +85 °C and -40 °C to +125 °C