(Hong Kong)
Product Summary
The SN74HC138N is a 3 line to 8 line decoder. The device is designed to be used in high-performance memory-decoding or datarouting applications requiring very short propagation delay times. In high-performance memory systems, the SN74HC138N can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of the SN74HC138N and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible.
Parametrics
SN74HC138N absolute maximum ratings: (1)Supply voltage range, VCC: -0.5 V to 7 V; (2)Input clamp current, IIK (VI < 0 or VI > VCC): ±20 mA; (3)Output clamp current, IOK (VO < 0 or VO > VCC): ±20 mA; (4)Continuous output current, IO (VO = 0 to VCC): ±25 mA; (5)Continuous current through VCC or GND: ±50 mA; (6)Package thermal impedance, θJA (see Note 2): 73℃/W.
Features
SN74HC138N features: (1)Targeted Specifically for High-Speed Memory Decoders and Data-Transmission Systems; (2)Wide Operating Voltage Range of 2 V to 6 V; (3)Outputs Can Drive Up To 10 LSTTL Loads; (4)Low Power Consumption, 80-μA Max ICC; (5)Typical tpd = 15 ns; (6)±4-mA Output Drive at 5 V; (7)Low Input Current of 1 μA Max; (8)Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception.
Diagrams
| Image | Part No | Mfg | Description |  |
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 SN74HC138N |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers 3-to-8 Line Decoder |
Data Sheet |
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SN74HC138NE4 |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers 3 to 8-Line Decdr/Demltplxer |
Data Sheet |
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SN74HC138NSR |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers 3-to-8 Line Decoder |
Data Sheet |
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SN74HC138NSRG4 |
Texas Instruments |
Encoders, Decoders, Multiplexers & Demultiplexers 3 to 8-Line Decdr/Demltplxer |
Data Sheet |
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