M41T00 STMicroelectronics, M41T00 Datasheet
M41T00
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M41T00 Summary of contents
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... LOW OPERATING CURRENT OF 300µA BATTERY OR SUPER-CAP BACK-UP BATTERY BACK-UP NOT RECOMMENDED FOR 3.0V APPLICATIONS (CAPACITOR BACK-UP ONLY) OPERATING TEMPERATURE OF –40 TO 85°C AUTOMATIC LEAP YEAR COMPENSATION SPECIAL SOFTWARE PROGRAMMABLE OUTPUT November 2002 SERIAL ACCESS TIMEKEEPER Figure 1. 8-pin SOIC Package 8 SO8 (M) M41T00 ® 1 1/20 ...
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... M41T00 TABLE OF CONTENTS SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Logic Diagram (Figure 2 SOIC Connections (Figure 3 Signal Names (Table 1 Block Diagram (Figure 4 MAXIMUM RATING Absolute Maximum Ratings (Table 2 AND AC PARAMETERS Operating and AC Measurement Conditions (Table 3 Testing Input/Output Waveform (Figure 5 Capacitance (Table 4 Characteristics (Table 5 Crystal Electrical Characteristics (Table 6.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OPERATION ...
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... Typical data retention time is in excess of 5 years with a 50mA/h 3V lithium cell (see Data Retention Mode, page 13 for AC/DC Characteristics). The M41T00 is supplied in 8 lead Plastic Small Outline package. Table 1. Signal Names OSCI OCSO ...
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... M41T00 Figure 4. Block Diagram OSCI OSCILLATOR 32.768 kHz OSCO FT/OUT V CC VOLTAGE SENSE and V SS SWITCH V BAT CIRCUITRY SCL SERIAL BUS INTERFACE SDA 4/ DIVIDER CENTURY/HOURS CONTROL LOGIC ADDRESS REGISTER SECONDS MINUTES DAY DATE MONTH YEAR CONTROL AI00603 ...
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... CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode. not implied. Exposure to Absolute Maximum Rat- ing conditions for extended periods may affect de- vice reliability. STMicroelectronics SURE Program and other rel- evant quality documents. Parameter Off, Oscillator Off) CC M41T00 Refer also to the Value Unit – °C –55 to 125 ° ...
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... Outputs deselected. 6/20 ment Conditions listed in the relevant tables. De- signers should check that the operating conditions in their projects match the measurement condi- tions when using the quoted parameters 0.7V CC 0.3V CC AI02568 (1,2) Parameter M41T00 Unit 2.0 to 5.5 V – °C 100 0.2V to 0.8V V ...
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... DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at kou- hou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type. 2. Load capacitors are integrated within the M41T00. Circuit board layout considerations for the 32.768kHz crystal of minimum trace lengths and isolation from RF generating signals should be taken into account. ...
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... M41T00 OPERATION The M41T00 clock operates as a slave device on the serial bus. Access is obtained by implementing a start condition followed by the correct slave ad- dress (D0h). The 8 bytes contained in the device can then be accessed sequentially in the following order: 1. Seconds Register 2. Minutes Register 3. Century/Hours Register 4 ...
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... SDA tBUF SCL P S Note STOP and S = START DATA LINE STABLE DATA VALID CHANGE OF DATA ALLOWED 1 2 MSB tHD:STA tR tF tHIGH tSU:DAT tLOW tHD:DAT M41T00 STOP CONDITION AI00587 CLOCK PULSE FOR ACKNOWLEDGEMENT 8 9 LSB AI00601 tHD:STA tSU:STA tSU:STO SR P AI00589 9/20 ...
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... M41T00 Table 7. AC Characteristics Symbol f SCL Clock Frequency SCL t Clock Low Period LOW t Clock High Period HIGH t SDA and SCL Rise Time R t SDA and SCL Fall Time F START Condition Hold Time t HD:STA (after this period the first clock pulse is generated) ...
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... READ Mode In this mode, the master reads the M41T00 slave after setting the slave address (see Figure 9). Fol- lowing the WRITE Mode Control Bit (R and the Acknowledge Bit, the word address An is writ- ten to the on-chip address pointer. Next the START condition and slave address are repeated, followed by the READ Mode Control Bit (R ...
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... M41T00 Figure 10. READ Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS DATA n+X Figure 11. Alternate READ Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS Figure 12. WRITE Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: ...
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... Data Retention Mode With valid V applied, the M41T00 can be ac- CC cessed as described above with READ or WRITE Cycles. Should the supply voltage decay, the Figure 13. Power Down/Up Mode AC Waveforms tPD SDA SCL Table 8. Power Down/Up AC Characteristics Symbol t SCL and SDA (2) SCL and SDA at V ...
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... M41T00 CLOCK OPERATION The eight byte clock register (see Table 10) is used to both set the clock and to read the date and time from the clock binary coded decimal for- mat. Seconds, Minutes, and Hours are contained within the first three registers. Bits D6 and D7 of ...
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... Clock Calibration The M41T00 is driven by a quartz controlled oscil- lator with a nominal frequency of 32,768Hz. The devices are tested not to exceed 35ppm (parts per million) oscillator frequency error at 25°C, which equates to about ±1.53 minutes per month. With the calibration bits properly set, the accuracy of each M41T00 improves to better than +2/– ...
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... M41T00 Figure 14. Crystal Accuracy Across Temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 Figure 15. Clock Calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION 16/ -0.038 ppm ( – Temperature 10 AI00999 AI00594B ...
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... M = SO8 (150 mils width) Temperature Range 6 = –40 to 85°C Shipping Method for SOIC blank = Tubes TR = Tape & Reel For a list of available options (e.g., Speed, Package) or for further information on any aspect of this device, please contact the ST Sales Office nearest to you. M41T 00 M M41T00 6 TR 17/20 ...
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... M41T00 PACKAGE MECHANICAL INFORMATION Figure 16. SO8 – 8-lead Plastic Small Package Outline Note: Drawing is not to scale. Table 12. SO8 – 8-lead Plastic Small Outline Package Mechanical Data Symb Typ 1. 18/20 A ddd Min Max 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5 ...
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... Modify reflow time and temperature footnote (Table 2) 06/05/02 3.5 Corrected operating voltage (Table 11) 07/03/02 3.6 Modify “Clock Operation” text, Crystal Electrical Characteristics table footnote (Table 6) 11/07/02 3.7 Correct figure name (Figure 1) Revision Details Max changed (Table 6) S (Table 9) SO M41T00 19/20 ...
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