The 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.
● Buffered 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 = 25°C
● Fanout (Over Temperature Range)
● Standard Outputs...10 LSTTL Loads
● Bus Driver Outputs...15 LSTTL Loads
● Wide Operating Temperature Range...55°C to 125°C
● Balanced Propagation Delay and Transition Times
● Significant Power Reduction Compared to LSTTL Logic ICs
● HC Types
● 2V to 6V Operation
● High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
● HCT Types
● 4.5V to 5.5V Operation
● Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
● CMOS Input Compatibility, Il 1µA at VOL, VOH
●Data sheet acquired from Harris Semiconductor
