74LS251N: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Description	Min	Typ	Max	Unit
VCC	Supply Voltage	4.75	-	5.25	V
IOH	Output High-Level Current	-	-	-400	μA
IOL	Output Low-Level Current	-	-	8	mA
VOL	Output Low-Level Voltage	-	0.4	-	V
VOH	Output High-Level Voltage	2.4	-	-	V
VIH	Input High-Level Voltage	2.0	-	-	V
VIL	Input Low-Level Voltage	-	-	0.8	V
IIH	Input High-Level Current	-	1	20	μA
IIL	Input Low-Level Current	-20	-1	-	μA
tpd	Propagation Delay Time	9	-	36	ns
tpw	Pulse Width (Minimum)	10	-	-	ns
Power Dissipation	Total	-	-	100	mW

Power Supply:
- Ensure that the supply voltage (VCC) is within the range of 4.75V to 5.25V.
Input and Output Levels:
- For inputs, maintain VIH above 2.0V for a high logic level and VIL below 0.8V for a low logic level.
- Outputs will be at least 2.4V for a high state (VOH) and no more than 0.4V for a low state (VOL).
Current Handling:
- The output can sink up to 8mA (IOL) and source up to 400μA (IOH).
- Inputs should not exceed 20μA (IIH) when high and -20μA (IIL) when low.
Timing Considerations:
- The propagation delay time (tpd) can vary from 9ns to 36ns depending on conditions.
- Ensure pulse widths are at least 10ns to avoid timing issues.
Power Dissipation:
- Keep the total power dissipation under 100mW to prevent overheating and damage.
Handling Static Electricity:
- Use proper anti-static precautions when handling the IC to prevent damage.
Mounting and Layout:
- Place decoupling capacitors close to the VCC and GND pins to reduce noise and improve stability.
Operating Temperature Range:
- The device is typically rated for an operating temperature range of -55°C to +125°C. Ensure environmental conditions do not exceed these limits.

This table and set of instructions provide essential information for effectively using the 74LS251N multiplexer/demultiplexer in your circuits.

(For reference only)