M41T11 STMicroelectronics, M41T11 Datasheet
M41T11
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M41T11 Summary of contents
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... SPECIAL SOFTWARE PROGRAMMABLE OUTPUT PACKAGING INCLUDES a 28-LEAD SOIC and ® SNAPHAT TOP (to be ordered separately; 3.3V to 5.0V supply voltage only) November 2002 Figure 1. 8-pin SOIC Package 8 1 SO8 (M) Figure 2. 28-pin SOIC Package SNAPHAT (SH Battery & Crystal 28 1 SOH28 (MH) M41T11 ® SRAM 1/24 ...
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... M41T11 TABLE OF CONTENTS SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Logic Diagram (Figure 3 Signal Names (Table 1 8-pin SOIC Connections (Figure 4 28-pin SOIC Connections (Figure 5 Block Diagram (Figure 6 MAXIMUM RATING Absolute Maximum Ratings (Table 2 AND AC PARAMETERS Operating and AC Measurement Conditions (Table 3 Testing Input/Output Waveform (Figure 7 Capacitance (Table 4 Characteristics (Table 5 ...
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... CLOCK OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Register Map (Table 10 Clock Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Output Driver Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Preferred Initial Power-on Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Crystal Accuracy Across Temperature (Figure 16 Clock Calibration (Figure 17 PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 SNAPHAT Battery Table (Table 12 PACKAGE MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 REVISION HISTORY M41T11 3/24 ...
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... The energy needed to sustain the RAM and clock operations can be supplied from a small lithium coin cell. Typical data retention time is in excess of 5 years with a 50mA/h 3V lithium cell. The M41T11 is sup- plied in 8 lead Plastic Small Outline package or 28 ® lead SNAPHAT package ...
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... V SS SWITCH V BAT CIRCUITRY SCL SERIAL BUS INTERFACE SDA Figure 5. 28-pin SOIC Connections V CC FT/OUT SCL SDA V SS DIVIDER CONTROL LOGIC ADDRESS REGISTER FT/OUT M41T11 SCL SDA AI03606 1 Hz SECONDS MINUTES CENTURY/HOURS DAY DATE MONTH YEAR CONTROL RAM ( AI02566 M41T11 5/24 ...
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... M41T11 MAXIMUM RATING Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicat the Operating sections of this specification is Table 2 ...
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... 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 M41T11 M41T11 Unit (1) V 2.0 to 5.5 – °C 100 0.2V to 0.8V ...
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... M41T11 Table 5. DC Characteristics Symbol Parameter I Input Leakage Current LI I Output Leakage Current LO I Supply Current CC1 I Supply Current (Standby) CC2 V Input Low Voltage IL V Input High Voltage IH V Output Low Voltage OL (2) Battery Supply Voltage V BAT I Battery Supply Current BAT Note: 1 ...
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... OPERATION The M41T11 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 64 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. Day Register 5 ...
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... M41T11 Figure 8. Serial Bus Data Transfer Sequence CLOCK DATA START CONDITION Figure 9. Acknowledgement Sequence START SCLK FROM MASTER DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER Figure 10. Bus Timing Requirements Sequence SDA tBUF SCL P S Note STOP and S = START 10/24 DATA LINE STABLE ...
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... Time the bus must be free before a new transmission can start BUF Note: 1. Valid for Ambient Operating Temperature Transmitter must internally provide a hold time to bridge the undefined region (300ns max.) of the falling edge of SCL. (1) Parameter = –40 to 85° 2.0 to 5.5V (except where noted M41T11 Min Max Unit 0 100 kHz 4.7 µs 4 µ ...
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... M41T11 READ Mode In this mode, the master reads the M41T11 slave after setting the slave address (see Figure 11). Following the write Mode Control Bit (R and the Acknowledge Bit, the word address A 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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... BUS ACTIVITY: SLAVE ADDRESS Figure 14. WRITE Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS WORD S ADDRESS (An) SLAVE ADDRESS P DATA n DATA n+1 WORD DATA n ADDRESS (An) M41T11 DATA n DATA n+1 AI00899 DATA n+X P AI00895 DATA n+1 DATA n+X P AI00591 13/24 ...
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... Note: 1. Valid for Ambient Operating Temperature All voltages referenced 3.3V application, if initial battery voltage is the battery) in order to avoid inadvertent switchover/deselection for V 4. Switch-over and deselect point. 14/24 M41T11 will automatically deselect, write protect- ing itself when V DON'T CARE (1) Parameter before Power Down IH ...
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... D3 D2 Seconds Minutes 10 Hours Hours Date Date Month Years S Calibration X = Don’t care CEB = Century Enable Bit CB = Century Bit Function/Range BCD Format D1 D0 Seconds Minutes Century/Hours Day Day Date Month Year Control M41T11 00-59 00-59 0-1/00-23 01-07 01-31 01-12 00-99 15/24 ...
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... M41T11 Clock Calibration The M41T11 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 M41T11 improves to better than +1/– ...
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... Figure 16. Crystal Accuracy Across Temperature Frequency (ppm –20 –40 –60 –80 –100 –120 –140 –160 –40 –30 –20 Figure 17. Clock Calibration NORMAL POSITIVE CALIBRATION NEGATIVE CALIBRATION F = -0.038 ppm ( – Temperature 10 AI00999 AI00594B M41T11 17/24 ...
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... M41T11 PART NUMBERING Table 11. Ordering Information Scheme Example: Device Type M41T Supply Voltage ( 2.0 to 5.5V CC Package M = SO8 (150 mils width) ( SOH28 Temperature Range 6 = –40 to 85°C Shipping Method for SOIC blank = Tubes TR = Tape & Reel Note: 1. The SOIC package (SOH28) requires the battery package (SNAPHAT “ ...
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... inches Typ Min 0.053 0.004 0.013 0.007 0.189 0.150 0.050 – 0.228 0.010 0.016 0° 8 M41T11 Max 0.069 0.010 0.020 0.010 0.197 0.157 – 0.244 0.020 0.035 8° 0.004 19/24 ...
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... M41T11 Figure 19. SOH28 – 28-lead Plastic Small Outline, Battery SNAPHAT Package Outline SOH-A Note: Drawing is not to scale. Table 14. SOH28 – 28-lead Plastic Small Outline, Battery SNAPHAT Package Mechanical Data Symb Typ 1. 20/ Min Max 3.05 0.05 0.36 2.34 2.69 0.36 0.51 ...
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... Min Max 9.78 6.73 7.24 6.48 6.99 0.38 0.46 0.56 21.21 21.84 14.22 14.99 15.55 15.95 3.20 3.61 2.03 2.29 M41T11 SHTK-A inches Typ Min Max 0.385 0.265 0.285 0.255 0.275 0.015 0.018 0.022 0.835 0.860 0.560 0.590 0.612 0.628 0.126 ...
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... M41T11 Figure 21. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline Note: Drawing is not to scale. Table 16. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mechanical Data Symb Typ 22/ Min Max 10.54 8.00 8.51 7.24 8.00 ...
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... Fix table footnotes (Table 5, 6) 05/01/02 3.4 Modify reflow time and temperature footnote (Table 2) 07/03/02 3.5 Modify “Clock Operation” text, Crystal Electrical Characteristics table footnote (Table 6) 11/07/02 3.6 Correct figure name (Figure 1) Revision Details Max changed (Table 6) S (Table 9) M41T11 23/24 ...
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