GENERAL DESCRIPTION. The DS serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable. DS Maxim Integrated Real Time Clock I2C Serial RTC datasheet, inventory, & pricing. DS Real Time Clock are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for DS Real Time Clock.

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The DS serial real-time clock is a low-power. Leap-Year Compensation Valid Up to Address and data are transferred serially through an. Available in a Surface-Mount Package with an. I C Serial Interface. The date at the end of the month is. Defaults to 32kHz on Power-Up. Medical Glucometer, Medicine Dispenser. Telecommunications Router, Switch, Server.

Pin Configurations appear at ratasheet of data sheet. I 2 C is a trademark of Philips Corp. Purchase of I 2 C components from. Maxim Integrated Products, Inc. Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device. For information about device errata, go to: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

These are stress ratings only. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability. Notes 5, 7, 8, 9.

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Bus Free Time Between a. Setup Time for a Repeated. Data Setup Time Note SCL Signals Note Capacitive Load for Each Bus. C are guaranteed by design and are not production tested.

Using recommended crystal on X1 and X2. The device is fully accessible when 1. Time and date are maintained when 1. After this period, the first clock pulse is generated. The maximum t HD: A fast-mode device can be used in a standard-mode system, but the requirement t SU: If such a device does stretch the LOW. C B –total capacitance of one bus line in pF. Connections for a Standard For more information about crystal selection. Considerations with Dallas Real-Time Clocks.


In this configuration, the X1 pin is. When enabled, INTA is asserted low when the. This pin is an. DC power is provided to the device on these pins. The SDA pin is open-drain output and requires an external pullup. SCL is used to synchronize data movement dattasheet the serial.

Programmable square-wave or interrupt. It is an datasgeet output and requires an external pullup.

DS1337, DS1337C I²C Serial Real-Time Clock

These pins are not connected internally, but must be. The Block Diagram shows the main elements of the DS As shown, communications to and from the DS The DS operates as a slave device on daatasheet serial bus. Access is obtained by. The device is fully accessible when V CC. The DS uses an external The oscillator circuit does not require any external resistors or.

DS Data Sheet | Maxim Integrated OEMSecrets

Table 1 specifies several crystal parameters for the external crystal. Figure 1 shows a. The startup time is usually less than 1 second when using a crystal.

The accuracy of the clock is dependent upon the accuracy of the crystal and the accuracy of the match between. External circuit noise coupled into the. Figure 2 shows a typical PC board layout for isolating the. Refer to Application Note Crystal Considerations with Dallas Real-Time. Clocks for detailed information. The DSC integrates a standard 32,Hz crystal in the package.

Refer to Application Note 58 for information dataasheet crystal accuracy vs. Table 2 shows the address map for the DS registers. During a multibyte access, when the address pointer. This eliminates the need. The time and calendar information is obtained by reading the appropriate register bytes. The RTC registers are. The time and calendar are set or initialized by writing the appropriate register bytes. The day-of-week register increments at midnight.


Values that correspond to the day of week are user-defined but. Illogical time and date entries. When reading or writing the time and date registers, secondary user buffers are used to prevent errors when the. When reading the time and date registers, the user buffers are synchronized to the. The countdown chain is reset whenever the seconds register is written. Write transfers occur on the acknowledge. To avoid rollover issues, once the countdown chain is reset, the remaining datashest and date.

The 1Hz square-wave output, if enable, transitions high ms after datashert. The DS can be run in either hour or hour mode. Bit 6 of the hours register is defined as the or.

When high, the hour mode is selected. In the hour mode, bit 5 is the second hour bit 20? The century bit bit 7 of. Alarm 1 can be set by writing to registers 07h? When all of the mask bits for each alarm are logic 0, an alarm only occurs when the values in the timekeeping. The alarms can also be. Table 3 shows the possible settings.

Configurations not listed in the table result in illogical operation. The match is tested on the once-per-second. Alarm once per second. Alarm when seconds match. Alarm when minutes and seconds match. Alarm when hours, minutes, and seconds match. Alarm when date, hours, minutes, and seconds. Alarm when day, hours, minutes, and seconds match. Alarm once per minute 00 seconds of every minute. Alarm when minutes match. Alarm when hours and minutes match.