Texas Instruments CD74HCT574 Series overview
Texas Instruments CD74HCT574 Series High-Speed CMOS Logic Octal D-Type Flip-Flop, 3-State Positive-Edge Triggered The ’HC374, ’HCT374, ’HC574, and ’HCT5...
Manufactured byTexas Instruments
Part number or familyCD74HCT574 Series
Product groupHigh-Speed CMOS Logic
Product details
Manufactured byTexas Instruments
Product groupHigh-Speed CMOS Logic
DescriptionTexas Instruments CD74HCT574 Series High-Speed CMOS Logic Octal D-Type Flip-Flop, 3-State Positive-Edge Triggered
OverviewThe ’HC374, ’HCT374, ’HC574, and ’HCT574 are octal D-type flip-flops with 3-state outputs and the capability to drive 15 LSTTL loads. The eight edge-triggered flip-flops enter data into their registers on the LOW to HIGH transition of clock (CP). The output enable (OE) controls the 3-state outputs and is independent of the register operation. When OE is HIGH, the outputs are in the high-impedance state. The 374 and 574 are identical in function and differ only in their pinout arrangements.
Key FeaturesBuffered Inputs Common Three-State Output Enable Control Three-State Outputs Bus Line Driving Capability Typical Propagation Delay (Clock to Q) = 15ns at VCC = 5V, CL = 15pF, TA = 25oC Fanout (Over Temperature Range)- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads Wide Operating Temperature Range . . . -55oC to 125oC Balanced Propagation Delay and Transition Times Significant Power Reduction Compared to LSTTL Logic ICs HC Types- 2-V to 6-V Operation- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V HCT Types- 4.5-V to 5.5-V Operation- Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
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High-Speed CMOS Logic
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