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74138 is a 3 to 8 line decoder or multiplexer IC. this IC is most suited for high-speed bipolar memory chip select address decoding. The device is made of Schottky diode which makes is a high-speed device and compatible with TTL IC.
Specification:
Voltage supply: 4.5-5.5V
Typical voltage supply: 5V
Maximum clock frequency: 30MHz
High-level output current: -800�A
Low-level output current: 16mA
High-level input voltage: 2V
Low-level input voltage: 0.8V
Current rating: 5.2mA
Propagation delay: 18ns
High speed
Low power consumption
TTL compatible
High noise immunity
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