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SN74AHCT374PWR,具有三态输出的八路边沿触发式D型触发器

2023/12/8 16:04:31

229

SN74AHCT374PWR

具有三态输出的八路边沿触发式 D 型触发器




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· Inputs Are TTL-Voltage Compatible

· Latch-Up Performance Exceeds 250 mA Per JESD 17

· ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

 


 

 

description/ordering information

 

The ’AHCT374 devices are octal edge-triggered D-type flip-flops that feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. This device is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

 

On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels of the data (D) inputs.

 

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

 

 

description/ordering information (continued)

 

OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

 

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.