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M41T65Q6F

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M41T65Q6F

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Part Number M41T65Q6F
Manufacturer STMicroelectronics
Description IC RTC CLK/CALENDAR I2C 16-QFN
Datasheet M41T65Q6F Datasheet
Package 16-VFQFN Exposed Pad
In Stock 2,626 piece(s)
Unit Price $ 0.7925 *
Lead Time Can Ship Immediately
Estimated Delivery Time Aug 6 - Aug 11 (Choose Expedited Shipping)
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Part Number # M41T65Q6F (Clock/Timing - Real Time Clocks) is manufactured by STMicroelectronics and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

For M41T65Q6F specifications/configurations, quotation, lead time, payment terms of further enquiries please have no hesitation to contact us. To process your RFQ, please add M41T65Q6F with quantity into BOM. Heisener.com does NOT require any registration to request a quote of M41T65Q6F.

M41T65Q6F Specifications

ManufacturerSTMicroelectronics
CategoryIntegrated Circuits (ICs) - Clock/Timing - Real Time Clocks
Datasheet M41T65Q6FDatasheet
Package16-VFQFN Exposed Pad
SeriesTimekeeper?
TypeClock/Calendar
FeaturesAlarm, Leap Year, Watchdog Timer
Memory Size-
Time FormatHH:MM:SS:hh (24 hr)
Date FormatYY-MM-DD-dd
InterfaceI2C, 2-Wire Serial
Voltage - Supply1.3 V ~ 4.4 V
Voltage - Supply, Battery-
Current - Timekeeping (Max)0.7µA ~ 0.95µA @ 1.3V ~ 4.4V
Operating Temperature-40°C ~ 85°C
Mounting TypeSurface Mount
Package / Case16-VFQFN Exposed Pad
Supplier Device Package16-QFN (3x3)

M41T65Q6F Datasheet

Page 1

Page 2

October 2015 DocID10397 Rev 22 1/44 This is information on a product in full production. www.st.com M41T62, M41T64, M41T65 Low-power serial real-time clocks (RTCs) with alarm Datasheet - production data Features • Serial real-time clock (RTC) with alarm functions − 400 kHz I2C serial interface − Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century − Tenths/hundredths of seconds register • 350 nA timekeeping current at 3 V • Timekeeping down to 1.0 V • 1.3 V to 4.4 V I2C bus operating voltage − 4.4 V max VCC suitable for lithium-ion battery operation • Low operating current of 35 µA (at 400 kHz I2C speed) • 32 KHz square wave output is on at power- up. Suitable for driving a microcontroller in low-power mode. Can be disabled. (M41T62/64) • Programmable 1 Hz to 32 KHz square wave output (M41T62/64) • Programmable alarm with interrupt function (M41T62/65) • 32 KHz crystal oscillator integrates crystal load capacitors, works with high series resistance crystals • Oscillator stop detection monitors clock operation • Accurate programmable watchdog − 62.5 ms to 31 min timeout • Software clock calibration. Can adjust timekeeping to within ±2 parts per million (±5 seconds per month) • Automatic leap year compensation • –40 to +85 °C operation • Two package options − Very small 3 x 3 mm, lead-free & halogen-free (ECOPACK2®) 16-lead QFN − Ultra-small 1.5 x 3.2 mm, lead-free & halogen-free (ECOPACK2®) 8-pin ceramic leadless chip carrier with embedded 32 KHz crystal - no external oscillator components required (M41T62)

Page 3

Contents M41T62, M41T64, M41T65 2/44 DocID10397 Rev 22 Contents 1 Description....................................................................................... 6 2 Operation ....................................................................................... 11 2.1 2-wire bus characteristics ................................................................ 11 2.1.1 Bus not busy ..................................................................................... 11 2.1.2 Start data transfer ............................................................................. 11 2.1.3 Stop data transfer ............................................................................. 11 2.1.4 Data valid .......................................................................................... 12 2.1.5 Acknowledge .................................................................................... 12 2.2 READ mode .................................................................................... 13 2.3 WRITE mode ................................................................................... 14 3 Clock operation ............................................................................. 15 3.1 RTC registers .................................................................................. 16 3.2 Calibrating the clock ........................................................................ 21 3.3 Setting alarm clock registers ........................................................... 23 3.4 Watchdog timer ............................................................................... 24 3.5 Watchdog output (???????????????????????? - M41T65 only) ......................................... 24 3.6 Square wave output (M41T62/64) ................................................... 25 3.7 Full-time 32 KHz square wave output (M41T64) ............................. 25 3.8 Century bits ..................................................................................... 26 3.9 Leap year ........................................................................................ 26 3.10 Output driver pin (M41T62/65) ........................................................ 27 3.11 Oscillator stop detection .................................................................. 27 3.12 Initial power-on defaults .................................................................. 27 4 Maximum ratings ........................................................................... 28 5 DC and AC parameters ................................................................. 29 6 Package information ..................................................................... 33 6.1 QFN16 package information ........................................................... 34 6.2 LCC8 package information .............................................................. 37 7 Packing information ...................................................................... 39 7.1 QFN16 carrier tape ......................................................................... 39 7.2 LCC8 carrier tape ............................................................................ 40 7.3 Reel information for QFN16 and LCC8 ........................................... 41

Page 4

M41T62, M41T64, M41T65 Contents DocID10397 Rev 22 3/44 8 Part numbering .............................................................................. 42 9 Revision history ............................................................................ 43

Page 5

List of tables M41T62, M41T64, M41T65 4/44 DocID10397 Rev 22 List of tables Table 1: Device summary ........................................................................................................................... 6 Table 2: Signal names ................................................................................................................................ 8 Table 3: M41T62 register map .................................................................................................................. 18 Table 4: M41T64 register map .................................................................................................................. 19 Table 5: M41T65 register map .................................................................................................................. 20 Table 6: Alarm repeat modes ................................................................................................................... 23 Table 7: Square wave output frequency ................................................................................................... 25 Table 8: Examples using century bits ....................................................................................................... 26 Table 9: Initial power-up values ................................................................................................................ 27 Table 10: Absolute maximum ratings ....................................................................................................... 28 Table 11: Operating and AC measurement conditions ............................................................................. 29 Table 12: Capacitance .............................................................................................................................. 30 Table 13: DC characteristics ..................................................................................................................... 30 Table 14: Crystal electrical characteristics ............................................................................................... 31 Table 15: Crystals suitable for use with M41T6x series RTCs ................................................................. 31 Table 16: Oscillator characteristics ........................................................................................................... 32 Table 17: AC characteristics ..................................................................................................................... 32 Table 18: QFN16 — 16-pin, quad, flat package, no-lead, 3x3 mm, package mechanical data ............... 35 Table 19: LCC8 — 8-pin, 1.5 x 3.2 mm leadless chip carrier package mechanical data ......................... 37 Table 20: Carrier tape dimensions for QFN16 3 x 3 mm package ........................................................... 39 Table 21: Reel dimensions for 12 mm carrier tape - QFN16 and LCC8 packages .................................. 41 Table 22: Ordering information scheme ................................................................................................... 42 Table 23: Document revision history ........................................................................................................ 43

Page 6

M41T62, M41T64, M41T65 List of figures DocID10397 Rev 22 5/44 List of figures Figure 1: M41T62 logic diagram ................................................................................................................. 6 Figure 2: M41T64 logic diagram ................................................................................................................. 7 Figure 3: M41T65 logic diagram ................................................................................................................. 7 Figure 4: M41T62 connections ................................................................................................................... 7 Figure 5: M41T64 connections ................................................................................................................... 8 Figure 6: M41T65 connections ................................................................................................................... 8 Figure 7: M41T62 block diagram ................................................................................................................ 9 Figure 8: M41T64 block diagram ................................................................................................................ 9 Figure 9: M41T65 block diagram ................................................................................................................ 9 Figure 10: Hardware hookup for SuperCap™ backup operation ............................................................. 10 Figure 11: Serial bus data transfer sequence ........................................................................................... 12 Figure 12: Acknowledgement sequence................................................................................................... 13 Figure 13: Slave address location ............................................................................................................ 13 Figure 14: READ mode sequence ............................................................................................................ 14 Figure 15: Alternative READ mode sequence .......................................................................................... 14 Figure 16: WRITE mode sequence .......................................................................................................... 14 Figure 17: Buffer/transfer registers ........................................................................................................... 16 Figure 18: Crystal accuracy across temperature ...................................................................................... 22 Figure 19: Calibration waveform ............................................................................................................... 22 Figure 20: Alarm interrupt reset waveform ............................................................................................... 23 Figure 21: Century bits CB1 and CB0 ...................................................................................................... 26 Figure 22: AC measurement I/O waveform .............................................................................................. 29 Figure 23: Crystal isolation example ......................................................................................................... 29 Figure 24: Bus timing requirements sequence ......................................................................................... 32 Figure 25: QFN16 — 16-pin, quad, flat package, no-lead, 3x3 mm, package outline ............................. 34 Figure 26: QFN16 — 16-pin, quad, flat package, no-lead, 3 x 3 mm recommended footprint ................. 36 Figure 27: LCC8 — 8-pin, 1.5 x 3.2 mm leadless chip carrier package outline ....................................... 37 Figure 28: LCC8 — 8-pin, 1.5 x 3.2 mm leadless chip carrier recommended footprint ........................... 38 Figure 29: Carrier tape for QFN16 3 x 3 mm package ............................................................................. 39 Figure 30: Carrier tape for LCC8 1.5 x 3.2 mm package .......................................................................... 40 Figure 31: Reel schematic ........................................................................................................................ 41

Page 7

Description M41T62, M41T64, M41T65 6/44 DocID10397 Rev 22 1 Description The M41T6x is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator. Eight registers are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional eight registers provide status/control of alarm, 32 KHz output, calibration, and watchdog functions. Addresses and data are transferred serially via a two-line, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. Functions available to the user include a time-of-day clock/calendar, alarm interrupts (M41T62/65), 32 KHz output (M41T62/64), programmable square wave output (M41T62/64), and watchdog output (M41T65). The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months are made automatically. The M41T6x is supplied in two very small packages: a tiny, 3 x 3 mm 16-pin QFN which requires a user-supplied 32 KHz crystal, and an ultra-small 1.5 x 3.2 mm LCC with embedded crystal - no external crystal is required. Table 1: Device summary Device Basic RTC Alarms OSC fail detect Watchdog timer Calibration SQW output ???????????????????????? output ???????????????????????? output F32K output M41T62 ✓ ✓ ✓ ✓ ✓ ✓ ✓ M41T64 ✓ ✓ ✓ ✓ ✓ ✓ ✓ M41T65 ✓ ✓ ✓ ✓ ✓ ✓ ✓ Figure 1: M41T62 logic diagram 1. Open drain. 2. Defaults to 32 KHz on power-up. 3. Not bonded on LCC package. SCL VCC M41T62 VSS SDA IRQ/OUT(1) SQW(2) XI (3) XO (3)

Page 8

M41T62, M41T64, M41T65 Description DocID10397 Rev 22 7/44 Figure 2: M41T64 logic diagram 1. Open drain. 2. Defaults to 32 KHz on power-up. Figure 3: M41T65 logic diagram 1. Open drain. Figure 4: M41T62 connections 1. SQW output defaults to 32 KHz upon power-up. 2. Open drain. SCL VCC M41T64 VSS SDA F32K (2) SQW(1) XI XO SCL VCC M41T65 VSS SDA WDO(1) IRQ/FT/OUT(1) XI XO 1 2 3 4 5 6 7 8 9 10 11 12 13141516 N C N C N C N C N C N C XI XO SQW(1) VSS V S S V C C NC SCL SDA IRQ/OUT(2) 1 2 3 4 5 6 7 8 VSS NC SCLSDA IRQ/OUT(2) NC VCC QFN LCC SQW(1)

Page 9

Description M41T62, M41T64, M41T65 8/44 DocID10397 Rev 22 Figure 5: M41T64 connections 1. Enabled on power-up. 2. Open drain. Figure 6: M41T65 connections 1. Open drain. Table 2: Signal names XI Oscillator input XO Oscillator output SDA Serial data input/output SCL Serial clock input IRQ/OUT Interrupt or OUT output (open drain) IRQ/FT/OUT Interrupt, frequency test, or OUT output (open drain) SQW Programmable square wave - defaults to 32 KHz on power-up (open drain for M41T64 only) F32K Dedicated 32 KHz output (M41T64 only) WDO Watchdog timer output (open drain) VCC Supply voltage VSS Ground 1 2 3 4 5 6 7 8 9 10 11 12 13141516 N C N C N C N C N C N C XI XO F32K (1) VSS V S S V C C NC SCL SDA SQW(2) 1 2 3 4 5 6 7 8 9 10 11 12 13141516 N C N C N C N C N C N C XI XO WDO(1) VSS V S S V C C NC SCL SDA IRQ/FT/OUT(1)

Page 10

M41T62, M41T64, M41T65 Description DocID10397 Rev 22 9/44 Figure 7: M41T62 block diagram 1. Open drain. 2. Defaults to 32 KHz on power-up. 3. Not bonded on embedded crystal (LCC) package. Figure 8: M41T64 block diagram 1. Defaults enabled on power-up. 2. Open drain. Figure 9: M41T65 block diagram 1. Open drain. REAL TIME CLOCK CALENDAR RTC W/ALARM OSCILLATOR FAIL DETECT SQUARE WAVE WATCHDOG IRQ/OUT(1) SQW(2) OFIE SDA SCL AFE SQWE I2C INTERFACE 32KHz OSCILLATOR XTAL (3) (3) REAL TIME CLOCK CALENDAR RTC W/ALARM OSCILLATOR FAIL DETECT SQUARE WAVE WATCHDOG SQW(2) F32K (1)32KE SDA SCL SQWE I2C INTERFACE 32KHz OSCILLATOR XTAL REAL TIME CLOCK CALENDAR RTC W/ALARM OSCILLATOR FAIL DETECT WATCHDOG IRQ/FT/OUT(1) WDO(1) OFIE SDA SCL FT AFE I2C INTERFACE 32KHz OSCILLATORXTAL

M41T65Q6F Reviews

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Reg***** Lara

July 16, 2020

Have never had a problem with my order. Packages arrive on time and in great condition.

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July 11, 2020

To be honest, you're beating your competitor on delivery - sometimes I request 2nd day and you still get it here overnight. Thanks!

Syl***** Das

July 5, 2020

Great deal, immediate response and very quick delivery!

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July 2, 2020

I can count on your provision for BOM of my design in near future

Kai*****n Pal

July 2, 2020

They worked as I expected. I'll definitely purchase again. Thank you!

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June 23, 2020

FAST POSTING TOP CONDITION RECORD HAVE A GREAT CHRISTMAS

Zek*****ora

June 21, 2020

Fast delivery well packed and as described.

Bri*****Chung

June 19, 2020

Worked as advertised and good price. Can you imagine buying these at local store it would cost way to much.

Rom*****Stein

June 17, 2020

Heisener parametric search for specific components is by far better than their competitors.

Alin*****riquez

June 16, 2020

Perfect, functional, arrived a weeks earlier, excellent Seller. Recommended

M41T65Q6F Guarantees

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We provide 90 days warranty.

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