Low-Voltage CMOS Octal Transceiver
With 5 V–Tolerant Inputs and Outputs (3–State, Inverting)

The MC74LCX245 is a high performance, non–inverting octal transceiver operating from a 2.3 to 3.6 V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5 V allows MC74LCX245 inputs to be safely driven from 5 V devices. The MC74LCX245 is suitable for memory address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24 mA at both A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bi–directional transceiver. Transmit (active–HIGH) enables data from A ports to B ports; Receive (active–LOW) enables data from B to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition.

• Designed for 2.3 to 3.6 V VCC Operation
• 5 V Tolerant — Interface Capability With 5 V TTL Logic
• Supports Live Insertion and Withdrawal
• IOFF Specification Guarantees High Impedance When VCC = 0 V
• LVTTL Compatible
• LVCMOS Compatible
• 24 mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (10 µA)
   Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500 mA
• ESD Performance: Human Body Model >2000 V; Machine Model
   >200 V