Details

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BUY DS1284QN https://www.utsource.net/itm/p/708757.html
Real-Time Clock

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	5.5	V
Standby Current	ICC	VCC = 3V, 25°C	-	1.0	-	μA
Standby Current	ICC	VCC = 5V, 25°C	-	1.5	-	μA
Active Current	ICC	VCC = 3V, 25°C, Reading/Writing	-	2.0	-	mA
Active Current	ICC	VCC = 5V, 25°C, Reading/Writing	-	3.0	-	mA
Output High Voltage	VOH	VCC = 3V, IO = -1mA	2.4	-	-	V
Output High Voltage	VOH	VCC = 5V, IO = -1mA	4.4	-	-	V
Output Low Voltage	VOL	VCC = 3V, IO = 1mA	-	-	0.4	V
Output Low Voltage	VOL	VCC = 5V, IO = 1mA	-	-	0.5	V
Input High Voltage	VIH	-	2.0	-	-	V
Input Low Voltage	VIL	-	-	-	0.8	V
Maximum Clock Frequency	fCLK	-	-	-	400	kHz
Data Retention Time	tRET	-	10	-	-	years
Operating Temperature Range	Toper	-	-40	-	85	°C
Storage Temperature Range	Tstg	-	-65	-	150	°C

Instructions for DS1284QN

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the range of 2.0V to 5.5V.
   • The device operates at low current consumption, making it suitable for battery-powered applications.

2. Current Consumption:

   • Standby current is minimal, typically 1.0 μA at 3V and 1.5 μA at 5V.
   • Active current during read/write operations is 2.0 mA at 3V and 3.0 mA at 5V.

3. Output Levels:

   • Ensure that the output high voltage (VOH) and output low voltage (VOL) meet the specified levels for reliable operation.
   • For VCC = 3V, VOH should be at least 2.4V and VOL should not exceed 0.4V.
   • For VCC = 5V, VOH should be at least 4.4V and VOL should not exceed 0.5V.

4. Input Levels:

   • The input high voltage (VIH) should be at least 2.0V.
   • The input low voltage (VIL) should not exceed 0.8V.

5. Clock Frequency:

   • The maximum clock frequency (fCLK) is 400 kHz.

6. Data Retention:

   • The device retains data for up to 10 years under normal operating conditions.

7. Temperature Ranges:

   • The operating temperature range is from -40°C to 85°C.
   • The storage temperature range is from -65°C to 150°C.

8. Handling and Storage:

   • Store the device in a dry, cool place to avoid damage.
   • Handle with care to prevent electrostatic discharge (ESD) damage.

9. Application Notes:

   • Refer to the datasheet for detailed application notes and circuit diagrams to ensure proper integration into your design.

(For reference only)