Details

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BUY TC74HC139 https://www.utsource.net/itm/p/12392169.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	5.5	V
Input Low Voltage	VIL	-	0.0	-	0.8	V
Input High Voltage	VIH	-	2.0	-	5.5	V
Output Low Voltage	VOL	IOL = 4 mA	0.0	-	0.4	V
Output High Voltage	VOH	IOH = -0.4 mA	2.4	-	VCC	V
Input Leakage Current	IIL	VIN = VCC	-1	-	1	渭A
Output Leakage Current	IOLeak	VOUT = 0 V	-5	-	5	渭A
Propagation Delay Time	tpd	VCC = 5 V, TA = 25掳C	6	-	-	ns
Power Dissipation	PD	Maximum at TA = 70掳C	-	-	500	mW

Instructions for Using the TC74HC139:

1. Supply Voltage (V_CC):

   • Ensure the supply voltage is within the range of 2.0 V to 5.5 V.
   • Use a stable power supply to avoid voltage fluctuations that could affect performance.

2. Input Voltage Levels:

   • Input low voltage (V_IL) should be between 0.0 V and 0.8 V.
   • Input high voltage (V_IH) should be between 2.0 V and 5.5 V.
   • Ensure input signals are within these ranges to prevent incorrect operation or damage.

3. Output Voltage Levels:

   • Output low voltage (V_OL) should not exceed 0.4 V when sinking 4 mA.
   • Output high voltage (V_OH) should be at least 2.4 V when sourcing -0.4 mA.
   • Verify load conditions to ensure these levels are maintained.

4. Leakage Currents:

   • Input leakage current (I_IL) should be between -1 渭A and 1 渭A.
   • Output leakage current (I_OLeak) should be between -5 渭A and 5 渭A.
   • These values are typical and should be considered in circuit design to avoid unexpected behavior.

5. Propagation Delay Time (t_pd):

   • The propagation delay time is typically 6 ns at V_CC = 5 V and T_A = 25掳C.
   • Consider this delay when designing timing-sensitive circuits.

6. Power Dissipation (P_D):

   • The maximum power dissipation is 500 mW at T_A = 70掳C.
   • Ensure adequate heat dissipation to avoid overheating, especially in high-power applications.

7. Handling and Storage:

   • Handle the device with care to avoid static discharge, which can damage sensitive components.
   • Store in a dry, cool place away from direct sunlight and sources of heat.

8. Application Notes:

   • The TC74HC139 is a 1-of-4 decoder/demultiplexer with active LOW outputs.
   • It can be used in digital systems for address decoding, data routing, and other control functions.
   • Refer to the datasheet for detailed pin configurations and functional descriptions.

(For reference only)