Datasheet
Table Of Contents
- Table 1. Device summary
- 1 Description
- Figure 1. M41T62 logic diagram
- Figure 2. M41T63 logic diagram
- Figure 3. M41T64 logic diagram
- Figure 4. M41T65 logic diagram
- Figure 5. M41T62 connections
- Figure 6. M41T63 connections
- Figure 7. M41T64 connections
- Figure 8. M41T65 connections
- Table 2. Signal names
- Figure 9. M41T62 block diagram
- Figure 10. M41T63 block diagram
- Figure 11. M41T64 block diagram
- Figure 12. M41T65 block diagram
- Figure 13. Hardware hookup for SuperCap™ backup operation
- 2 Operation
- 3 Clock operation
- 3.1 RTC registers
- 3.2 Calibrating the clock
- 3.3 Setting alarm clock registers
- 3.4 Watchdog timer
- 3.5 Watchdog output (WDO - M41T63/65 only)
- 3.6 Square wave output (M41T62/63/64)
- 3.7 Full-time 32 KHz square wave output (M41T64)
- 3.8 Century bits
- 3.9 Leap year
- 3.10 Output driver pin (M41T62/65)
- 3.11 Oscillator stop detection
- 3.12 Initial power-on defaults
- 4 Maximum ratings
- 5 DC and AC parameters
- Table 12. Operating and AC measurement conditions
- Figure 25. AC measurement I/O waveform
- Figure 26. Crystal isolation example
- Table 13. Capacitance
- Table 14. DC characteristics
- Table 15. Crystal electrical characteristics
- Table 16. Crystals suitable for use with M41T6x series RTCs
- Table 17. Oscillator characteristics
- Figure 27. Bus timing requirements sequence
- Table 18. AC characteristics
- 6 Package mechanical information
- Figure 28. QFN16 - 16-pin, quad, flat package, no-lead, 3 mm x 3 mm body size, outline
- Table 19. QFN16 - 16-pin, quad, flat package, no-lead, 3 mm x 3 mm body size, mechanical data
- Figure 29. QFN16 - 16-pin, quad, flat package, no-lead, 3 x 3 mm, recommended footprint
- Figure 30. LCC8 - 8-pin, 1.5 mm x 3.2 mm leadless chip carrier, outline
- Table 20. LCC8 - 8-pin, 1.5 mm x 3.2 mm leadless chip carrier, mechanical data
- Figure 31. LCC8 - 8-pin, 1.5 mm x 3.2 mm leadless chip carrier, recommended footprint
- Figure 32. Carrier tape for QFN16 3 mm x 3 mm package
- Table 21. Carrier tape dimensions for QFN16 3 mm x 3 mm package
- Figure 33. Carrier tape for LCC8 1.5 mm x 3.2 mm package
- Figure 34. Reel schematic
- Table 22. Reel dimensions for 12 mm carrier tape - QFN16 and LCC8 packages
- 7 Part numbering
- 8 Revision history
DocID10397 Rev 20 37/44
M41T62, M41T63, M41T64, M41T65 Package mechanical information
Figure 28. QFN16 – 16-pin, quad, flat package, no-lead, 3 mm x 3 mm body size, outline
Note: Drawing is not to scale.
Table 19. QFN16 – 16-pin, quad, flat package, no-lead, 3 mm x 3 mm body size,
mechanical data
A3
A
A1
e
K
K
b
Ch
D2
E2
L
E
D
1
2
ddd
3
QFN16-A
C
Symb
mm inches
Typ Min Max Typ Min Max
A 0.90 0.80 1.00 0.035 0.032 0.039
A1 0.02 0.00 0.05 0.001 0.000 0.002
A3 0.20 – – 0.008 – –
b 0.25 0.18 0.30 0.010 0.007 0.012
D 3.00 2.90 3.10 0.118 0.114 0.122
D2 1.70 1.55 1.80 0.067 0.061 0.071
E 3.00 2.90 3.10 0.118 0.114 0.122
E2 1.70 1.55 1.80 0.067 0.061 0.071
e0.50– –0.020– –
K0.20– –0.008– –
L 0.40 0.30 0.50 0.016 0.012 0.020
ddd – 0.08 – – 0.003 –
Ch – 0.33 – – 0.013 –
N16 16