SN74BCT574

Pinout




Specifications

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input voltage range, V_I(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . 0.5 V to 7 V
Voltage range applied to any output in the disabled or power-off state, V_O . . . . . . . .  0.5 V to 5.5 V
Voltage range applied to any output in the high state, V_O . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to V_CC 
Input clamp current, I_IK  (V_I  < 0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   30 mA 
Current into any output in the low state, I_O : SN54BCT574  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  96 mA
                                                                        SN74BCT574  . . . . . . . . . . . . . . . . . . . . . . . . . . .  128 mA
Operating free-air temperature range: SN54BCT574 . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C
                                                             SN74BCT574  . . . . . . . . . . . . . . . . . . . . . . . . . . .   0°C to 70°C
Storage temperature range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.


Description

These SN74BCT574 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.


The eight flip-flops of the  BCT574 are edge-triggered D-type flip-flops. On the positive transition of the clock (CLK) input, the Q outputs will be set to the logic levels that were set up at the data (D) inputs.


A SN74BCT574 buffered output-enable (OE) input can be used  to place the eight outputs in either a normal logic CLK state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components.


The SN74BCT574 output enable (OE) does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.


The SN54BCT574 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74BCT574 is characterized for operation from  0°C to 70°C.