M41T56M6E STMicroelectronics, M41T56M6E Datasheet
M41T56M6E
Specifications of M41T56M6E
M41T56M6
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M41T56M6E Summary of contents
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Serial Access TIMEKEEPER FEATURES SUMMARY 5V ±10% SUPPLY VOLTAGE COUNTERS FOR SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEARS, AND CENTURY YEAR 2000 COMPLIANT SOFTWARE CLOCK CALIBRATION AUTOMATIC POWER-FAIL DETECT AND SWITCH CIRCUITRY ...
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M41T56 TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Figure 16.AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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M41T56 SUMMARY DESCRIPTION ® The M41T56 TIMEKEEPER bit static CMOS RAM organized as 64 words by 8 bits. A built-in 32,768Hz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and ...
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Figure 4. 8-pin SOIC Connections M41T56 OSCI 1 8 OSCO BAT AI02306B Figure 6. Block Diagram OSCI OSCILLATOR 32.768 kHz OSCO FT/OUT VOLTAGE V CC SENSE and V SS SWITCH V ...
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M41T56 OPERATION The M41T56 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 ...
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Figure 7. Serial Bus Data Transfer Sequence CLOCK DATA START CONDITION Figure 8. Acknowledge Sequence START SCLK FROM MASTER DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER DATA LINE STABLE DATA VALID CHANGE OF DATA ALLOWED 1 2 MSB M41T56 ...
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M41T56 Figure 9. Bus Timing Requirements Sequence SDA tBUF SCL P S Table 2. 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 ...
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READ Mode In this mode, the master reads the M41T56 slave after setting the slave address (see Figure Figure 11., page 9). Following the WRITE Mode Control Bit (R and the Acknowledge Bit, the word address A is ...
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M41T56 Figure 12. Alternative READ Mode Sequence BUS ACTIVITY: MASTER SDA LINE S BUS ACTIVITY: SLAVE ADDRESS WRITE Mode In this mode the master transmitter transmits to the M41T56 slave receiver. Bus protocol is shown in Figure 13., page 10. ...
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CLOCK OPERATION The eight byte clock register (see Table 3) is used to both set the clock and to read the date and time from the clock binary coded decimal format. Seconds, Minutes, and Hours are contained within ...
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M41T56 Clock Calibration The M41T56 is driven by a quartz-controlled oscil- lator with a nominal frequency of 32,768Hz. The devices are tested not to exceed 35 ppm (parts per million) oscillator frequency error at 25°C, which equates to about ±1.53 ...
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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 – ...
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... FT Bit will be set to a '0' and the OUT Bit will be set to a '1.' All other Register bits will initially power- random state. 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 SNAPHAT Off, Oscillator Off) CC SOIC ...
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DC AND AC PARAMETERS This section summarizes the operating and mea- surement conditions, as well as the DC and AC characteristics of the device. The parameters in the following DC and AC Characteristic tables are derived from tests performed under ...
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... Load Capacitance L Note: 1. These values are externally supplied if using the SO8 package. STMicroelectronics recommends the KDS DT-38: 1TA/ 1TC252E127, Tuning Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS can be contacted at kouhou@kdsj.co.jp or http://www.kdsj.co.jp for further information on this crystal type. ...
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Figure 17. Power Down/Up Mode AC Waveforms PFD V SO tPD SDA SCL I BAT Table 9. Power Down/Up Mode AC Characteristics Symbol t SCL and SDA (min ...
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M41T56 PACKAGE MECHANICAL INFORMATION Figure 18. SO8 – 8-pin Plastic Small Package Outline SO-a Note: Drawing is not to scale. Table 11. SO8 – 8-pin Plastic Small Outline, Package Mechanical Data Symb Typ A A1 ...
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Figure 19. SOH28 – 28-lead Plastic Small Outline, 4-socket battery SNAPHAT, Package Outline SOH-A Note: Drawing is not to scale. Table 12. SOH28 – 28-lead Plastic Small Outline, 4-socket battery SNAPHAT, Mech. Data Symb Typ ...
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M41T56 Figure 20. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Outline Note: Drawing is not to scale. Table 13. SH – 4-pin SNAPHAT Housing for 48mAh Battery & Crystal, Package Mech. Data Symb Typ A A1 ...
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Figure 21. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Outline Note: Drawing is not to scale. Table 14. SH – 4-pin SNAPHAT Housing for 120mAh Battery & Crystal, Package Mech. Data Symb Typ ...
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M41T56 PART NUMBERING Table 15. Ordering Information Scheme Example: Device Type M41T Supply Voltage and Write Protect Voltage 4.5 to 5.5V CC Package M = SO8 ( SOH28 Temperature Range 6 = –40 to ...
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REVISION HISTORY Table 17. Document Revision History Date Rev. # March 1999 1.0 First Issue 12/23/99 1.1 SOH28 package added 03/21/00 1.2 Series Resistance Max Value Changed (Table 8) 11/30/00 1.3 Added PSDIP8 package 01/25/01 1.4 Corrected graphic, measurements of ...
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... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...