Details

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BUY DS1685EN-5+ https://www.utsource.net/itm/p/12612470.html

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Supply Voltage	VCC	4.5	5.0	5.5	V	Operating voltage range
Standby Current	ISB	-	1.0	2.0	μA	Typical at 25°C, VCC = 5V
Active Current	IOP	10	30	50	mA	Maximum active current at 25°C, VCC = 5V
Operating Temperature	TOPR	-40		85	°C	Full operating temperature range
Output Voltage (High)	VOH	2.4	4.5	5.0	V	Minimum output high level at VCC = 5V, IOL = 4mA
Output Voltage (Low)	VOL	0	0.4	0.5	V	Maximum output low level at VCC = 5V, IOL = 16mA
Input Voltage (High)	VIH	2.0		5.0	V	Minimum input high level at VCC = 5V
Input Voltage (Low)	VIL	0		0.8	V	Maximum input low level at VCC = 5V
Propagation Delay	tPD	20	35	70	ns	Typical propagation delay at VCC = 5V, 25°C
Power-on Reset Time	tPOR	100	200	400	ms	Maximum time to reset after power-on
Watchdog Timer Period	tWD	0.1	1.6	2.5	s	Typical watchdog timer period
Real-Time Clock Accuracy	RTC	-	±20	+	ppm	Typical accuracy over temperature range

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the specified range (4.5V to 5.5V).
   • Connect the VCC pin to a stable 5V power source.
   • Ground the GND pin to the system ground.

2. Standby Mode:

   • To minimize power consumption, use the standby mode by setting the appropriate control bits in the configuration registers.
   • In standby mode, the device consumes approximately 1.0 μA.

3. Active Mode:

   • For active operation, ensure the device is powered and the necessary control signals are applied.
   • The maximum active current is 50 mA.

4. Temperature Considerations:

   • The device operates reliably over the temperature range from -40°C to 85°C.
   • For optimal performance, avoid operating in extreme temperatures.

5. Input/Output Levels:

   • Ensure that input signals meet the specified VIH and VIL levels.
   • Output signals will be within the specified VOH and VOL levels when driving the specified load currents.

6. Propagation Delay:

   • Account for the typical propagation delay of 35 ns when designing timing-critical applications.

7. Power-On Reset:

   • The device will reset automatically after a power-on delay of up to 400 ms.
   • Ensure that the system waits for this period before initiating communication with the device.

8. Watchdog Timer:

   • The watchdog timer can be configured to generate a reset if the system does not service it within the specified period (0.1 to 2.5 seconds).

9. Real-Time Clock:

   • The real-time clock provides accurate timekeeping with a typical accuracy of ±20 ppm over the operating temperature range.
   • Calibrate the clock as needed to maintain precise timekeeping.

10. Configuration Registers:

    • Use the configuration registers to set up the device according to your application requirements.
    • Refer to the datasheet for detailed register descriptions and programming instructions.

11. Communication Protocol:

    • The device supports standard communication protocols (e.g., I2C, SPI). Ensure the communication protocol is correctly configured and implemented.

12. Handling and Storage:

    • Handle the device with care to avoid damage from electrostatic discharge (ESD).
    • Store the device in a dry, cool environment to prevent moisture-related issues.

(For reference only)