IC Phoenix
 
Home ›  MM10 > M41T93RQA6F-M41T93ZQA6F,Serial SPI bus real-time clock (RTC) with battery switchover
M41T93RQA6F-M41T93ZQA6F Fast Delivery,Good Price
Part Number:
If you need More Quantity or Better Price,Welcom Any inquiry.
We available via phone +865332716050 Email
Partno Mfg Dc Qty AvailableDescript
M41T93RQA6FSTN/a1avaiSerial SPI bus real-time clock (RTC) with battery switchover
M41T93ZQA6FSTMN/a22avaiSerial SPI bus real-time clock (RTC) with battery switchover


M41T93ZQA6F ,Serial SPI bus real-time clock (RTC) with battery switchoverFeatures Ultra-low battery supply current of 365 nA Factory calibrated accuracy ±5 ppm typical af ..
M41T94MH6 ,512 Bit (64 bit X8) Serial RTC (SPI) SRAMfeatures include a Power-On Reset as well as twoTape & Reel form. For the 28-lead SOIC, the bat-add ..
M41T94MH6E ,512 Bit (64 bit X8) Serial RTC (SPI) SRAMElectrical Characteristics (Externally Supplied) . . 24Figure 19.Power Down/Up Mode AC Waveforms ..
M41T94MH6TR ,512 Bit (64 bit X8) Serial RTC (SPI) SRAMBlock Diagram . . 6Figure 7. Hardware Hookup . . . . . . . 6Table 2. Function Table ..
M41T94MQ6 ,512 Bit (64 bit X8) Serial RTC (SPI) SRAMFEATURES SUMMARY■ 2.7 TO 5.5V OPERATING VOLTAGE Figure 1. 16-pin SOIC Package■ SERIAL PERIPHERAL IN ..
M41T94MQ6E ,512 Bit (64 bit X8) Serial RTC (SPI) SRAMFEATURES SUMMARY . . . . . 1Figure 1. 16-pin SOIC Package . . . . 1Figure 2. 28-pin SO ..
M5M5V408BFP-85HI , 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
M5M5V408BKV-85H , 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
M5M5V408BTP-85H , 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
M5M5V408BTP-85H , 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
M5M5V408BTP-85HI , 4194304-BIT (524288-WORD BY 8-BIT) CMOS STATIC RAM
M5M5V416BTP-70H , 4194304-BIT (262144-WORD BY 16-BIT) CMOS STATIC RAM


M41T93RQA6F-M41T93ZQA6F
Serial SPI bus real-time clock (RTC) with battery switchover
November 2013 DocID12615 Rev 8 1/56
M41T93

Serial SPI bus real-time clock (RTC) with battery switchover
Datasheet - production data
Features
Ultra-low battery supply current of 365 nA Factory calibrated accuracy ±5 ppm typical
after 2 reflows (SOX18) (much better
accuracies are achievable using built-in
programmable analog and digital calibration
circuits) 2.0 V to 5.5 V clock operating voltage Counters for tenths/hundredths of seconds,
seconds, minutes, hours, day, date, month,
year, and century Automatic switchover and reset output circuitry
(fixed reference):
M41T93S: VCC = 3.0 V to 5.5 V;
M41T93R: VCC = 2.7 V to 5.5 V;
M41T93Z: VCC = 2.38 V to 5.50 V Compatible with SPI bus serial interface
(supports SPI mode 0 [CPOL = 0, CPHA = 0]) Programmable alarm with interrupt function
(valid even during battery backup mode) Optional 2nd programmable alarm available Square wave output (defaults to 32 KHz on
power-up) RESET (RST) output Watchdog timer Programmable 8-bit counter/timer 7 bytes of battery-backed user SRAM Battery low flag Low operating current of 80 μA Oscillator stop detection Battery or supercapacitor backup Operating temperature of –40 °C to +85 °C Package options include a 16-lead QFN and an
18-lead embedded crystal SOIC
Contents M41T93
2/56 DocID12615 Rev 8
Contents Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 SPI signal description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1.1 Serial data output (SDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1.2 Serial data input (SDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1.3 Serial clock (SCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1.4 Chip enable (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1 SPI bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 READ and WRITE cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.3 Data retention and battery switchover (VSO = V RST ) . . . . . . . . . . . . . . . . 15
2.4 Power-on reset (trec ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Clock operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1 Clock data coherency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1.1 Example of incoherency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.1.2 Accessing the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.2 Halt bit (HT) operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.1 Power-down time stamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3 Real-time clock accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.4 Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.4.1 Digital calibration (periodic counter correction) . . . . . . . . . . . . . . . . . . .22
3.4.2 Analog calibration (programmable load capacitance) . . . . . . . . . . . . . .25
3.4.3 Pre-programmed calibration value . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.5 Setting the alarm clock registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.6 Optional second programmable alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.7 Watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.8 8-bit (countdown) timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.8.1 Timer interrupt/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
3.8.2 Timer flag (TF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.8.3 Timer interrupt enable (TIE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.8.4 Timer enable (TE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.8.5 TD1/0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
DocID12615 Rev 8 3/56
M41T93 Contents

3.9 Square wave output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.10 Battery low warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.11 Century bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.12 Oscillator fail detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.13 Oscillator fail interrupt enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.14 IRQ/FT/OUT pin, frequency test, interrupts and the OUT bit . . . . . . . . . . 38
3.14.1 Active mode operation on VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
3.14.2 Backup mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
3.15 Initial power-on defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.16 OTP bit operation (SOX18 package only) . . . . . . . . . . . . . . . . . . . . . . . . 42 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
List of tables M41T93
4/56 DocID12615 Rev 8
List of tables

Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 2. Function table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 3. Clock/control register map (32 bytes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Table 4. Digital calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Table 5. Analog calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 6. Alarm repeat modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table 7. Timer control register map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Table 8. Timer interrupt operation in free-running mode (with TI/TP = 1). . . . . . . . . . . . . . . . . . . . .33
Table 9. Timer source clock frequency selection (244.1 μs to 4.25 hrs) . . . . . . . . . . . . . . . . . . . . .34
Table 10. Square wave output frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Table 11. Priority for IRQ/FT/OUT pin when operating on VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Table 12. Priority for IRQ/FT/OUT pin when operating in backup mode . . . . . . . . . . . . . . . . . . . . . .41
Table 13. Initial power-on default values (part 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Table 14. Initial power-up default values (part 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Table 15. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Table 16. Operating and AC measurement conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Table 17. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Table 18. DC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Table 19. Crystal electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Table 20. Oscillator characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Table 21. Power down/up trip points DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Table 22. AC characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Table 23. QFN16 – 16-lead, quad, flat package, no lead, 4 x 4 mm body, mech. data . . . . . . . . . . .51
Table 24. SOX18 – 18-lead plastic SO, 300 mils, embedded crystal, pkg. mech. data . . . . . . . . . . .53
Table 25. Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Table 26. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
DocID12615 Rev 8 5/56
M41T93 List of figures
List of figures

Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 2. QFN16 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 3. SOX18 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 4. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 5. Hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Figure 6. Data and clock timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Figure 7. READ mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 8. WRITE mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Figure 9. Clock data coherency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 10. Internal load capacitance adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 11. Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 12. Clock accuracy vs. on-chip load capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 13. Clock divider chain and calibration circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Figure 14. Crystal isolation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 15. Backup mode alarm waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Figure 16. Timer output waveform in free-running mode (with TI/TP = 1) . . . . . . . . . . . . . . . . . . . . . .33
Figure 17. Battery check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Figure 18. Two-bit binary counter (century bits CB1:CB0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Figure 19. IRQ/FT/OUT output pin circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Figure 20. Measurement AC I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 21. ICC2 vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Figure 22. Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 23. Input timing requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Figure 24. Output timing requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Figure 25. QFN16 – 16-lead, quad, flat package, no lead, 4 x 4 mm body size, outline . . . . . . . . . . .51
Figure 26. QFN16 – 16-lead, quad, flat, no lead, 4 x 4 mm, recommended footprint . . . . . . . . . . . . .52
Figure 27. 32 KHz crystal + QFN16 vs. VSOJ20 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Figure 28. SOX18 – 18-lead plastic small outline, 300 mils, embedded crystal . . . . . . . . . . . . . . . . .53
ic,good price


TEL:86-533-2716050      FAX:86-533-2716790
   

©2020 IC PHOENIX CO.,LIMITED