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X1243V8 データシート(PDF) 1 Page - Intersil Corporation |
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X1243V8 データシート(HTML) 1 Page - Intersil Corporation |
1 / 17 page 1 ® FN8249.0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. PRELIMINARY X1243 16K (2K x 8), 2-Wire RTC Real Time Clock/Calendar/Alarm with EEPROM Features • 2 alarms—interrupt output - Settable on the second, 10s of seconds, minute, 10s of minutes, hour, day, month, or day of the week - Repeat alarm for time base generation • 2-wire interface interoperable with I2C - 400kHz data transfer rate • Secondary power supply input with internal switch-over circuitry • 2Kbytes of EEPROM - 64-byte page write mode - 3-bit Block Lock™ protection • Low power CMOS - <1µA operating current - <3mA active current during program - <400µA active current during data read • Single byte write capability • Typical nonvolatile write cycle time: 5ms • High reliability • Small package options - 8-lead SOIC package, 8-lead TSSOP package Description The X1243 is a Real Time Clock with clock/calendar circuits and two alarms. The dual port clock and alarm registers allow the clock to operate, without loss of accuracy, even during read and write operations. The clock/calendar provides functionality that is con-trollable and readable through a set of registers. The clock, using a low cost 32.768kHz crystal input, accu-rately tracks the time in seconds, minutes, hours, date, day, month and years. It has leap year correction and automatic adjustment for months with less than 31 days. An alarm match of the RTC sets an interrupt ag and activates an interrupt pin. An alternative alarm function provides a pulsed interrupt for long time constant time- bases. The device offers a backup power input pin. This V BACK pin allows the device to be backed up by a non-rechargeable battery. The RTC is fully operational from 1.8 to 5.5 volts. The X1243 provides a 2Kbyte EEPROM array, giving a safe, secure memory for critical user and conguration data. This memory is unaffected by complete failure of the main and backup supplies. Block Diagram X1 X2 Oscillator Frequency Timer Logic Divider Calendar 8 32.768kHz Control Registers 1Hz Time Keeping Registers Alarm Regs Compare IRQ Control Decode Logic Alarm (EEPROM) (EEPROM) SCL SDA Serial Interface Decoder Interrupt Enable 16k (2k x 8) EEPROM Array Register Status (SRAM) Alarm Alarm (SRAM) Data Sheet April 28, 2005 NOT REC OMM END ED F OR NEW DES IGN S NO R ECO MME NDE D RE PLA CEM ENT cont act o ur T echn ical Sup port Cen ter a t 1-88 8-IN TER SIL or w ww. inter sil.c om/ tsc |
同様の部品番号 - X1243V8 |
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同様の説明 - X1243V8 |
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