具有三态输出的 16 位 D 类边沿触发触发器
The SN54ACT16374 and are 16-bit edge-triggered D-type flip-flops with 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.
These devices can be used as two 8-bit flip-flops or one 16-bit flip-flop. On the positive transition of the clock CLK input, the Q outputs of the flip-flop take on the logic levels set up at the data D inputs.
An output-enable input OE can be used to place the 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 provides the capability to drive bus lines in a bus-organized system without need for interface or pullup components. OE does not affect the 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.
The 74ACT16374 is packaged in s shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit board area.
The SN54ACT16374 is characterized for operation over the full military temperature range of -55°C to 125°C. The 74ACT16374 is characterized for operation from -40°C to 85°C.
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- Members of the Texas Instruments Widebus™ Family
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- Inputs Are TTL-Voltage Compatible
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- 3-State Bus-Driving True Outputs
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- Flow-Through Architecture Optimizes PCB Layout
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- Distributed Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise
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- EPIC™ Enhanced-Performance Implanted CMOS 1-µm Process
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- 500-mA Typical Latch-Up Immunity at 125°C
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- Package Options Include Plastic 300-mil Shrink Small-Outline DL Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat WD Packages Using 25-mil Center-to-Center Pin Spacings
EPIC and Widebus are trademarks of Texas Instruments Incorporated.