Details

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BUY SN74HCT139N https://www.utsource.net/itm/p/11646196.html
IC DUAL 2TO4 DECOD/DEMUX 16-DIP

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	6.0	V
Input Low Voltage	VIL	-	0.0	-	0.8	V
Input High Voltage	VIH	-	2.0	-	VCC	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 Current (Low)	IIL	VIL = 0 V	-1.0	-	-0.1	μA
Input Current (High)	IIH	VIH = VCC	-20	-	20	μA
Output Current (Sink)	IOL	VOL = 0.4 V	-8	-	-4	mA
Output Current (Source)	IOH	VOH = VCC - 0.4 V	4	-	8	mA
Propagation Delay Time	tpd	VCC = 5 V, TA = 25°C	-	10	22	ns
Power Dissipation	PD	Maximum at TA = 25°C	-	-	100	mW

Instructions for Using SN74HCT139N

1. Supply Voltage:

   • Ensure the supply voltage (V_CC) is within the range of 2.0 V to 6.0 V.
   • Connect the V_CC pin to the positive power supply and GND pin to ground.

2. Input Signals:

   • Apply input signals within the specified voltage ranges:
     • Low input (V_IL): 0.0 V to 0.8 V
     • High input (V_IH): 2.0 V to V_CC
   • Ensure input currents do not exceed the specified limits:
     • Low input current (I_IL): -1.0 μA to -0.1 μA
     • High input current (I_IH): -20 μA to 20 μA

3. Output Signals:

   • The output low voltage (V_OL) should be 0.0 V to 0.4 V when sinking up to 4 mA.
   • The output high voltage (V_OH) should be 2.4 V to V_CC when sourcing up to 0.4 mA.
   • Ensure output currents do not exceed the specified limits:
     • Sink current (I_OL): -8 mA to -4 mA
     • Source current (I_OH): 4 mA to 8 mA

4. Propagation Delay:

   • The propagation delay time (t_pd) is typically 10 ns with a maximum of 22 ns at V_CC = 5 V and T_A = 25°C.

5. Power Dissipation:

   • The maximum power dissipation (P_D) is 100 mW at T_A = 25°C. Ensure proper heat dissipation if operating near this limit.

6. Handling:

   • Handle the device with care to avoid static damage. Use proper ESD protection measures.
   • Follow standard PCB layout guidelines to ensure reliable operation and minimize noise.

7. Storage:

   • Store the device in a dry environment to prevent moisture damage.
   • Keep the device in its original packaging until ready for use.

(For reference only)