Timer Ic

Low-Sine Wave Distortion, 0.5%,
Typica l D Excellent Temperature Stability,
20 ppm/°C,
Typ.D Wide Sweep Range, 2000: 1, Typical D Low-Supply Sensitivity,0.01%V, Typ.
Linear Amplitude Modulation 
TTL Compatible FSK Controls Wide Supply Range, 10V to 26V D Adjustable D uty Cycle, 1% TO 99%

The M48T08/18/08Y is a non-volatile pin and func-tion equivalent to any JEDEC standard 8K x 8SRAM. It also easily fits into many ROM, EPROM,and EEPROM sockets, providing the non-volatilityof PROMs without any requirement for specialWRITE timing or limitations on the number ofWRITEs that can be performed

I2C real-time clock (RTC) featuring an inbuilt temperature-compensated crystal oscillator (TCXO) and crystal, the DS3231 is a low-cost device that is remarkably precise. The gadget has a battery input and can continue to retain accurate time even if its primary power source is interrupted. The addition of the crystal resonator improves the instrument's long-term precision and lowers the number of pieces required to produce it. The DS3231 comes in a 16-pin, 300-mil SO box and is supplied in commercial and industrial temperature ranges. The RTC keeps track of information regarding seconds, minutes, hours, days, dates, months, and years. For months with fewer than 31 days, the dates at the end of the month is automatically changed to account for leap years. With an AM/PM indication, the clock may run on either a 12- or 24-hour basis.There are two programmable time-of-day alarms as well as a programmable square-wave output.

I2C bidirectional bus is used to serially transport address and data. A precise temperature-compensated voltage reference and comparator circuit keeps track of VCC's condition to detect power outages, offer a reset output, and, if necessary, switch automatically to the backup source. In addition, the RST pin is watched as a push button input for external reset generation.

Low-power serial real-time clock (RTC) with 56 bytes of NVRAM is the M41T11. The clock/calendar function uses a built-in 32.768 kHz oscillator (driven by an external crystal) and the first 8 bytes of RAM, which are programmed in binary-coded decimal (BCD) format. A two-line, bidirectional bus is used to serially send addresses and data. After every write or read of a data byte, the built-in address register is automatically increased. A power sensor circuit incorporated into the M41T11 clock detects power outages and automatically switches to the battery source when one occurs. A tiny lithium coin battery can provide the necessary power to run the clock and RAM.