SN74AVC16722 - 具有三态输出的 22 位触发器

SN74AVC16722是TI德州仪器公司的一款D类触发器产品，SN74AVC16722是具有三态输出的 22 位触发器，本站介绍了SN74AVC16722的封装应用图解、特点和优点、功能等，并给出了与SN74AVC16722相关的TI元器件型号供参考。

SN74AVC16722 - 具有三态输出的 22 位触发器 - D类触发器 - 触发器/锁存器/寄存器 - 德州仪器

产品描述

A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1 shows typical VOL vs IOL and VOH vs IOH curves to illustrate the output impedance and drive capability of the circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOCTM ) Circuitry Technology and Applications, literature number SCEA009.

This 22-bit flip-flop is operational at 1.2-V to 3.6-V VCC, but is designed specifically for 1.65-V to 3.6-V VCC operation.

The 22 flip-flops of the SN74AVC16722 are edge-triggered D-type flip-flops with clock-enable (CLKEN\) input. On the positive transition of the clock (CLK) input, the device stores data into the flip-flops if CLKEN\ is low. If CLKEN\ is high, no data is stored.

A buffered output-enable (OE\) input places the 22 outputs in either a normal logic state (high or low) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. OE\ does not affect the internal operation of the flip-flops. 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.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The SN74AVC16722 is characterized for operation from -40°C to 85°C.

产品特性

Member of the Texas Instruments WidebusTM Family
EPICTM (Enhanced-Performance Implanted CMOS) Submicron Process
DOCTM (Dynamic Output Control) Circuit Dynamically Changes Output Impedance, Resulting in Noise Reduction Without Speed Degradation
Dynamic Drive Capability Is Equivalent to Standard Outputs With IOH and IOL of ±24 mA at 2.5-V VCC
Overvoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data Communications
Ioff Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class I
Packaged in Thin Shrink Small-Outline Package
DOC, EPIC, and Widebus are trademarks of Texas Instruments.

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