The DS1337 serial real-time clock is a low-power clock/calendar with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I²C bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator.The device is fully accessible through the serial interface while VCC is between 1.8V and 5.5V. I²C operation is not guaranteed below 1.8V. Timekeeping operation is maintained with VCC as low as 1.3V.ApplicationsConsumer Electronics (Set-Top Box, VCR/Digital Recording)Handhelds (GPS, POS Terminal, MP3 Player)Medical (Glucometer, Medicine Dispenser)Office Equipment (Fax/Printer, Copier)Other (Utility Meter, Vending Machine, Thermostat, Modem)Telecommunications (Router, Switcher, Server)

The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in Figure 8. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for day of month and leap year are made automatically.ApplicationsBattery-Backed SystemsConsumer ElectronicsOffice EquipmentRemote SystemsTelecom Switches

The AD9520-31 provides a multioutput clock distribution function with subpicosecond jitter performance, along with an on-chip PLL and VCO. The on-chip VCO tunes from 1.72 GHz to 2.25 GHz. An external 3.3 V/5 V VCO/VCXO of up to 2.4 GHz can also be used.The AD9520 serial interface supports both SPI and I2C® ports. An in-package EEPROM can be programmed through the serial interface and store user-defined register settings for power-up and chip reset.The AD9520 features 12 LVPECL outputs in four groups. Any of the 1.6 GHz LVPECL outputs can be reconfigured as two 250 MHz CMOS outputs.Each group of outputs has a divider that allows both the divide ratio (from 1 to 32) and the phase (coarse delay) to be set.The AD9520 is available in a 64-lead LFCSP and can be operated from a single 3.3 V supply. The external VCO can have an operating voltage up to 5.5 V. A separate output driver power supply can be from 2.375 V to 3.465 V.The AD9520 is specified for operation over the standard industrial range of −40°C to +85°C.1The AD9520 is used throughout this data sheet to refer to all the members of the AD9520 family. However, when AD9520-3 is used, it is referring to that specific member of the AD9520 family.Applications Low jitter, low phase noise clock distribution Clock generation and translation for SONET, 10Ge, 10G FC, and other 10 Gbps protocols Forward error correction (G.710) Clocking high speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs High performance wireless transceivers ATE and high performance instrumentation Broadband infrastructures

The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391/DS1394 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/calendars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. One programmable time-of-day alarm is provided. A temperature-compensated voltage reference monitors the status of VCC and automatically disables the bus interface and switches to the backup supply if a power failure is detected. On the DS1390, a single open drain output provides a CPU interrupt or a square wave at one of four selectable frequencies. The DS1391 replaces the SQW/active-low INT pin with an active-low RST output/debounced input.The DS1390, DS1391, and DS1394 are programmed serially through an SPI-compatible, bidirectional bus. The DS1392 and DS1393 communicate over a 3-wire serial bus, and the extra pin is used for either a separate interrupt pin or an active-low RST output/debounced input.All five devices are available in a 10-pin µSOP package, and are rated over the industrial temperature range.ApplicationsEmbedded Time StampingGPS/Telematics DevicesHandheld DevicesMedical Devices

The DS3234 is a low-cost, extremely accurate SPI™ bus real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The DS3234 incorporates a precision, temperature-compensated voltage reference and comparator circuit to monitor VCC. When VCC drops below the power-fail voltage (VPF), the device asserts the active-low RST output and also disables read and write access to the part when VCC drops below both VPF and VBAT. The active-low RST pin is monitored as a pushbutton input for generating a µP reset. The device switches to the backup supply input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3234 is available in commercial and industrial temperature ranges, and is offered in an industry-standard 300-mil, 20-pin SO package.The DS3234 also integrates 256 bytes of battery-backed SRAM. In the event of main power loss, the contents of the memory are maintained by the power source connected to the VBAT pin. The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially by an SPI bidirectional bus.ApplicationsGPSServersTelematicsUtility Power Meters

The DS1100L is a 3.3V version of the DS1100. It is characterized for operation over the range 3.0V to 3.6V. The DS1100L series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry-standard µMAX® and SO packaging. The DS1100L 5-tap silicon delay line reproduces the input-logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1100L is designed to reproduce both leading and trailing edges with equal precision. Each tap is capable of driving up to 10 74LS loads.Maxim can customize standard products to meet special needs.

The DS1100L is a 3.3V version of the DS1100. It is characterized for operation over the range 3.0V to 3.6V. The DS1100L series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry-standard µMAX® and SO packaging. The DS1100L 5-tap silicon delay line reproduces the input-logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1100L is designed to reproduce both leading and trailing edges with equal precision. Each tap is capable of driving up to 10 74LS loads.Maxim can customize standard products to meet special needs.

The DS1100L is a 3.3V version of the DS1100. It is characterized for operation over the range 3.0V to 3.6V. The DS1100L series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry-standard µMAX® and SO packaging. The DS1100L 5-tap silicon delay line reproduces the input-logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1100L is designed to reproduce both leading and trailing edges with equal precision. Each tap is capable of driving up to 10 74LS loads.Maxim can customize standard products to meet special needs.

The DS1100L is a 3.3V version of the DS1100. It is characterized for operation over the range 3.0V to 3.6V. The DS1100L series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry-standard µMAX® and SO packaging. The DS1100L 5-tap silicon delay line reproduces the input-logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1100L is designed to reproduce both leading and trailing edges with equal precision. Each tap is capable of driving up to 10 74LS loads.Maxim can customize standard products to meet special needs.

The DS1100 series delay lines have five equally spaced taps providing delays from 4ns to 500ns. These devices are offered in surface-mount packages to save PCB area. Low cost and superior reliability over hybrid technology is achieved by the combination of a 100% silicon delay line and industry-standard µMAX® and SO packaging. The DS1100 5-tap silicon delay line reproduces the input-logic state at the output after a fixed delay as specified by the extension of the part number after the dash. The DS1100 is designed to reproduce both leading and trailing edges with equal precision. Each tap can drive up to 10 74LS loads.Maxim can customize standard products to meet special needs.