The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller. In the absence of power, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM. The watch keeps track of hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with less than 31 days, including leap year correction. The watch operates in one of two formats: a 12-hour mode with an AM/PM indicator or a 24-hour mode. The nonvolatile controller supplies all the necessary support circuitry to convert a CMOS RAM to a nonvolatile memory. The DS1315 can be interfaced with either RAM or ROM without leaving gaps in memory.

The MAX9321B low-skew differential receiver/driver is designed for clock and data distribution. The differential input can be adapted to accept a single-ended input by connecting the on-chip VBB supply to an input as a reference voltage.The MAX9321B features ultra-low propagation delay (172ps) and part-to-part skew (20ps) with 24mA maximum supply current, making this device ideal for clock buffering or repeating. For interfacing to differential PECL and LVPECL signals, these devices operate over a +3.0V to +5.5V supply range, allowing high-performance clock and data distribution in systems with a nominal 3.3V or 5.0V supply. For differential ECL and LVECL operation, this device operates from a -3.0V to -5.5V supply. The MAX9321B is offered in industry-standard 8-pin SO and TSSOP packages.ApplicationsLow-Jitter Data RepeaterPrecision Clock Buffers

Timers & Support Products 8-Bit Binary, Programmable, RC Timer Counter

Real Time Clock ultra-low power RTC RTC IC

Delay Lines/Timing Elements

Clock Buffer 2:10 LVPECL buffer (1.25GHz), 2:1 input mux (QFN32), footprint-compatible with MC100LVEP111

3.3V Zero Delay Clock Buffer, Spread Spectrum Compatible

Low Skew, 1-to-10 Differential-to-2.5V, 3.3V LVPECL / ECL Fanout Buffer

6-output 1.5 V PCIe Gen1-2-3 Zero Delay / Fanout Buffer with Zo=100 ohms

8-output 1.5 V PCIe Gen1-2-3 Zero Delay / Fanout Buffer