Details

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BUY GD74HCT138 https://www.utsource.net/itm/p/12599595.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC		4.75		5.25	V
Output Low Voltage	VOL	IO = 16mA, TA=25掳C	0.3		0.4	V
Output High Voltage	VOH	IO = -4mA, TA=25掳C	2.4		2.7	V
Input Leakage Current	IIL	VI = 0V or VCC	-1		1	渭A
Propagation Delay Time	tpd	VCC=5V, TA=25掳C	6		9	ns
Power Dissipation	PD	Continuous			100	mW

Instructions for GD74HCT138

1. Power Supply Connection:

   • Connect the VCC pin to a stable 5V power supply and GND to ground. Ensure proper decoupling capacitors are used near the power pins to stabilize the supply voltage.

2. Input Signals:

   • Apply input signals (G1, G2A, G2B, A, B, C) as per your logic requirements. The enable inputs (G1, G2A, G2B) control the active state of the decoder outputs.

3. Output Handling:

   • The GD74HCT138 has three active-low outputs. Ensure that any connected devices can handle the output current specifications provided in the table.
   • When an output is not selected, it will be in a high-impedance state.

4. Propagation Delay Consideration:

   • Account for the propagation delay in timing-sensitive applications. This delay can affect the overall performance of circuits using this decoder.

5. Operating Temperature:

   • Ensure the device operates within its specified temperature range to maintain reliability and performance.

6. Storage and Handling:

   • Store in a dry environment and handle with care to avoid damage from electrostatic discharge (ESD).

7. Application Examples:

   • Commonly used in digital systems for address decoding, data routing, and control signal generation.

This table and instructions provide essential information for effectively integrating the GD74HCT138 into digital circuit designs.

(For reference only)