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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

The 74HC138N is a 3-to-8 line Decoder or Demultiplexer with inverting and decodes three binary weighted address inputs to eight mutually exclusive outputs. The device features three enable inputs. Every output will be high unless E1 and E2 are low and E3 is high. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four 138 ICs and one inverter. The 138 can be used as an eight output demultiplexer by using one of the active low enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
CMOS input level
Demultiplexing capability
Multiple input enable for easy expansion
Active low mutually exclusive outputs
Ideal for memory chip select decoding
ESD protection HBM JESD22-A114F exceeds 2000V
ESD sensitive device, take proper precaution while handling the device.

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74HC138N Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	16 Pin
Case/Package	DIP
Supply Voltage (DC)	2.00V (min)
Number of Outputs	8 Output
Number of Circuits	1 Circuit
Number of Positions	16 Position
Number of Inputs	3 Input
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-40 ℃
Supply Voltage	2.6 VDC
Supply Voltage (Max)	6 V
Supply Voltage (Min)	2 V
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Operating Temperature	-40℃ ~ 125℃
Product Lifecycle Status	Unknown
Packaging	Bulk
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17

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