Details

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Parameter	Description	Symbol	Min	Typ	Max	Unit
Supply Voltage (Vcc)	Operating supply voltage	Vcc	4.75		5.25	V
Output High-Level Voltage	Output voltage when high	VOH	2.4		Vcc-0.1	V
Output Low-Level Voltage	Output voltage when low	VOL	0		0.4	V
Input High-Level Voltage	Minimum input voltage to be recognized as high	VIH	2.0		Vcc-0.8	V
Input Low-Level Voltage	Maximum input voltage to be recognized as low	VIL	0		0.8	V
Clock Frequency	Maximum clock frequency for operation	fMAX			1.5	MHz
Propagation Delay Time	Time delay from input change to output change	tpd		30	60	ns
Power Dissipation	Total power dissipation	PD			500	mW

Instructions for MC6821

1. Power Supply: Ensure the supply voltage is within the specified range of 4.75V to 5.25V to avoid damage or unreliable operation.
2. Clock Operation: The device can operate with a clock frequency up to 1.5 MHz. Ensure that the clock signal is stable and within this range.
3. Input Levels: For reliable operation, input signals should have voltages within the defined ranges for high (VIH) and low (VIL) levels.
4. Output Levels: Outputs will switch between the specified VOH and VOL levels. Verify that these levels are compatible with connected devices.
5. Propagation Delay: Account for propagation delays in timing-sensitive applications. The typical delay is around 30ns to 60ns.
6. Power Management: Monitor the power dissipation to ensure it does not exceed 500mW to prevent overheating.

For detailed application notes and more specific guidelines, refer to the official datasheet provided by the manufacturer.

(For reference only)