74HCT244N: 马来西亚的首选 Utsource Holding Company Limited

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BUY 74HCT244N https://www.utsource.net/itm/p/15188.html
Octal buffer, line driver; 3-state - Description: Octal Buffer/Line Driver; Non-Inverting; TTL Enabled 3-State ; Logic switching levels: TTL ; Number of pins: 20 ; Output drive capability: +/- 6 mA ; Power dissipation considerations: Low Power ; Propagation delay: 11 ns; Voltage: 4.5-5.5V

Below is the parameter table and instructions for the 74HCT244N octal buffer/line driver.

74HCT244N Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	V_CC	2.0	5.0	6.0	V
Input Low Voltage	V_IL	0.0	0.8	1.5	V	V_CC = 4.5V to 5.5V
Input High Voltage	V_IH	3.5	4.0	5.0	V	V_CC = 4.5V to 5.5V
Output Low Voltage (Sink)	V_OL	0.0	0.1	0.4	V	I_OL = -4mA, V_CC = 4.5V to 5.5V
Output High Voltage (Source)	V_OH	4.5	4.9	5.0	V	I_OH = 0.4mA, V_CC = 4.5V to 5.5V
Input Leakage Current	I_IL	-1.0	0	1.0	μA	V_CC = 4.5V to 5.5V
Output Leakage Current	I_OL	-1.0	0	1.0	μA	V_CC = 4.5V to 5.5V
Propagation Delay Time	t_pd	5	10	15	ns	V_CC = 5.0V, T_A = 25°C
Power Dissipation	P_D	-	-	100	mW	Per output, V_CC = 5.0V
Operating Temperature Range	T_A	-40	25	85	°C	Commercial Grade
Storage Temperature Range	T_STG	-65	-	150	°C

Instructions for 74HCT244N

Pin Configuration:
- 1-8, 14-21: Data Inputs (A1-A8, B1-B8)
- 9, 13: Output Enable (OE1, OE2)
- 10-17, 2-9: Data Outputs (Y1-Y8, Z1-Z8)
- 18: V_CC
- 19: GND
Operation:
- The 74HCT244N is an octal buffer/line driver with two sets of 4-bit buffers.
- Each set has its own output enable (OE) pin.
- When OE is low, the corresponding outputs are active and follow the inputs.
- When OE is high, the corresponding outputs are in a high-impedance state (tristate).
Power Supply:
- Connect V_CC to the positive supply voltage (2.0V to 6.0V).
- Connect GND to the ground.
Input and Output Handling:
- Ensure that input voltages do not exceed the supply voltage range.
- Outputs can source or sink up to 25mA per pin, but the total power dissipation should not exceed 100mW per output.
Temperature Considerations:
- Operate the device within the specified temperature range to ensure reliable performance.
- Store the device in the recommended storage temperature range to avoid damage.
Layout and PCB Design:
- Use short and wide traces for power and ground lines to minimize noise and improve stability.
- Place decoupling capacitors (0.1μF) close to the V_CC and GND pins to filter out high-frequency noise.
Handling:
- Handle the device with care to avoid static discharge, which can damage the internal circuits.
- Use appropriate ESD protection when handling and soldering the device.

By following these parameters and instructions, you can effectively use the 74HCT244N in your digital circuit designs.

(For reference only)