总线收发器 OCTAL BUS TRANSCEIVE
The 74LVC245A is a high performance, non-inverting octal transceiver operating from a 1.2 to 5.5V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A V specification of 5.5V allows 74LVC245A inputs to be safely driven from 5V devices. The 74LVC245A 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/Rbar 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.
Features
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- Designed for 1.2 to 3.6 V VCC Operation
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- 5 V Tolerant − Interface Capability with 5 V TTL Logic
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- Supports Live Insertion and Withdrawal
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- IOFF Specification Guarantees High Impedance When VCC = 0 V
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- 24 mA Output Sink and Source Capability
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- Near Zero Static Supply Current in All Three Logic States 10 µA Substantially Reduces System Power Requirements
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- Latch−up Performance Exceeds 250 mA
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- ESD Performance: Human Body Model >2000 V; Machine Model >200 V
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- These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant