描述 Description

Low–Voltage CMOS Octal Transceiver
With 5V-Tolerant Inputs and Outputs (3-State, Non-Inverting)The MC74LCX245 is a high performance, non–inverting octal transceiver operating from a 2.7 to 3.6V 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 5.5V allows MC74LCX245 inputs to be safely driven from 5V devices. The MC74LCX245 is suitable for memory address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24mA 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 2.7 to 3.6V VCC Operation
? 5V Tolerant — Interface Capability With 5V TTL Logic
? Supports Live Insertion and Withdrawal
? IOFF Specification Guarantees High Impedance When VCC = 0V
? LVTTL Compatible
? LVCMOS Compatible
? 24mA Balanced Output Sink and Source Capability
? Near Zero Static Supply Current in All Three Logic States (10μA)
?? Substantially Reduces System Power Requirements
? Latchup Performance Exceeds 500mA
? ESD Performance: Human Body Model 2000V; Machine Model 200V