SN74LVTH322374 - 具有三态输出的 3.3V ABT 32 位边沿触发 D 类触发器

SN74LVTH322374是TI德州仪器公司的一款D类触发器产品，SN74LVTH322374是具有三态输出的 3.3V ABT 32 位边沿触发 D 类触发器，本站介绍了SN74LVTH322374的封装应用图解、特点和优点、功能等，并给出了与SN74LVTH322374相关的TI元器件型号供参考。

SN74LVTH322374 - 具有三态输出的 3.3V ABT 32 位边沿触发 D 类触发器 - D类触发器 - 触发器/锁存器/寄存器 - 德州仪器

产品描述

产品特性

Member of the Texas InstrumentsWidebus+™ Family
Output Ports Have Equivalent 22- Series Resistors, So No External Resistors Are Required
Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
Supports Unregulated Battery Operation Down to 2.7 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
Ioff and Power-Up 3-State Support Hot Insertion
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
Distributed VCC and GND Pins Minimize High-Speed Switching Noise
Flow-Through Architecture Optimizes PCB Layout
Latch-Up Performance Exceeds 500 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)

Widebus+ is a trademark of Texas Instruments.

DESCRIPTION/ORDERING INFORMATION

The SN74LVTH322374 is a 32-bit edge-triggered D-type flip-flop with 3-state outputs designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

This device can be used as four 8-bit flip-flops, two 16-bit flip-flops, or one 32-bit flip-flop. On the positive transition of the clock (CLK), the Q outputs of the flip-flop take on the logic levels set up at the 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 need for interface or pullup components.

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.

The outputs, which are designed to source or sink up to 12 mA, include equivalent 22- series resistors to reduce overshoot and undershoot.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, 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 hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

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