DESCRIPTION
The LVT646 is a high-performance BiCMOS product designed for VCC operation at 3.3V.
   
FEATURES
• Combines 74LVT245 and 74LVT574 type functions in one device
• Independent registers for A and B buses
• Multiplexed real–time and stored data
• Output capability: +64mA/–32mA
• TTL input and output switching levels
• Input and output interface capability to systems at 5V supply
• Bus-hold data inputs eliminate the need for external pull-up
    resistors to hold unused inputs
• Live insertion/extraction permitted
• No bus current loading when output is tied to 5V bus
• Latch-up protection exceeds 500mA per JEDEC Std 17
• Power-up 3-State
• Power-up reset
• ESD protection exceeds 2000V per MIL STD 883 Method 3015
    and 200V per Machine Model