Details

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BUY IDT74FCT138CTSO https://www.utsource.net/itm/p/4553578.html
CMOS 1-OF-8 DECODER WITH ENABLE

Parameter	Description	Value
Part Number	Component Identifier	IDT74FCT138CTSO
Function	3-Line-to-8-Line Decoder/Demultiplexer
Package Type	Package Style	TSSOP (Thin Small Outline Package)
Pin Count	Number of Pins	16
Supply Voltage (Vcc)	Operating Voltage	2.0 V to 5.5 V
Operating Temperature	Temperature Range for Operation	-40掳C to +85掳C
Propagation Delay	Time delay from input change to output response	5.5 ns (typical at Vcc = 5V)
Power Dissipation	Maximum Power Consumption	100 mW
Input Current	Current into Input Pins	卤1 渭A (max)
Output Current	Current Capability from Output Pins	卤15 mA (max)
Storage Temperature	Temperature Range for Storage	-65掳C to +150掳C

Instructions:

1. Power Supply Connection: Connect the supply voltage (Vcc) and ground (GND) pins as specified in the datasheet.
2. Input Configuration: Ensure that all input lines are properly connected and configured according to the logic requirements.
3. Enable Pin Management: Use the enable pins (G1, G2A, G2B) to control the operation of the decoder. The device is enabled when G1 is HIGH and both G2A and G2B are LOW.
4. Output Handling: Outputs are active LOW. When an output is selected, it goes LOW. Unselected outputs remain HIGH.
5. Decoding Logic: The binary inputs A, B, and C select one of the eight possible outputs. Verify the truth table in the datasheet for specific input-output relationships.
6. Handling Unused Inputs: Tie unused input pins to a fixed logic level (either Vcc or GND) to prevent floating states which can lead to unpredictable behavior.
7. Thermal Considerations: Ensure adequate heat dissipation if operating near maximum power dissipation limits.

(For reference only)