Description
●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.
●Features
●• 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= 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
