General description
The 74LVT640 is a high-performance BiCMOS product designed for VCC operation at 3.3 V.
This device is an octal transceiver featuring inverting 3-state bus compatible outputs in both send and receive directions. The control function implementation minimizes external timing requirements. The device features an output enable (OE) input for easy cascading and a direction (DIR) input for direction control.
   
Features and benefits
• 3-state buffers
• Octal bidirectional bus interface
• Input and output interface capability to systems at 5 V supply
• TTL input and output switching levels
• Output capability: +64 mA and -32 mA
• Bus-hold data inputs eliminate the need for external pull-up resistors for unused inputs
• Live insertion/extraction permitted
• Power-up 3-state
• No bus current loading when output is tied to 5 V bus
• Latch-up protection:
    – JESD78: exceeds 500 mA
• ESD protection:
    – MIL STD 883 method 3015: exceeds 2000 V
    – MM JESD22-A115-A exceeds 200 V