SN74LVTH646PW

3.3 -V ABT八路总线收发器和寄存器具有三态输出 3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

description/ordering information

These bus transceivers and registers are designed specifically for low-voltage 3.3-V VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The ’LVTH646 devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock CLKAB or CLKBA input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the ’LVTH646.

• Support Mixed-Mode Signal Operation

   5-V Input and Output Voltages With 3.3-V VCC

• Support 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

• 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