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8 Terminations5V 8 Pin M41T81 Real Time ClocksTimer or RTC SubcategoryAlarm, Leap Year, Square Wave Output, Watchdog Timer 0.032MHz
- Manufacturer: STMicroelectronics
- NO: 761-M41T81M6E
- Package: 8-SOIC (0.154, 3.90mm Width)
- Datasheet:
- Stock: 8900
- Description: 8 Terminations5V 8 Pin M41T81 Real Time ClocksTimer or RTC SubcategoryAlarm, Leap Year, Square Wave Output, Watchdog Timer 0.032MHz (Kg)
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| Parameters | |
|---|---|
| Mount | Surface Mount |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154, 3.90mm Width) |
| Number of Pins | 8 |
| Operating Temperature | -40°C~85°C |
| Packaging | Tube |
| JESD-609 Code | e4 |
| Feature | Alarm, Leap Year, Square Wave Output, Watchdog Timer |
| Part Status | Discontinued |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Number of Terminations | 8 |
| ECCN Code | EAR99 |
| Type | Clock/Calendar |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Subcategory | Timer or RTC |
| Technology | CMOS |
| Voltage - Supply | 2V~5.5V |
| Terminal Position | DUAL |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage | 5V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Base Part Number | M41T81 |
| Pin Count | 8 |
| Number of Outputs | 1 |
| Power Supplies | 2.5/5V |
| Interface | I2C, 2-Wire Serial |
| Memory Size | 64B |
| RAM Size | 20B |
| Clock Frequency | 0.032MHz |
| Logic Function | Clock |
| Number of Timers | 1 |
| Time Format | HH:MM:SS:hh (24 hr) |
| Date Format | YY-MM-DD-dd |
| Current - Timekeeping (Max) | 100μA @ 2V~5.5V |
| Interrupt Capability | Y |
| Voltage - Supply, Battery | 2.5V~3.5V |
| Volatile | YES |
| Information Access Method | I2C |
| Height | 1.25mm |
| Length | 4.9mm |
| Width | 3.9mm |
| Radiation Hardening | No |
| REACH SVHC | No SVHC |
| RoHS Status | ROHS3 Compliant |
| Lead Free | Lead Free |
M41T81M6E Description
The M41T81M6E is a low-power serial RTC with a built-in 32.768 kHz oscillator (external crystal controlled). Eight bytes of the SRAM are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format.
M41T81M6E Features
For all new designs use M41T81S
Counters for tenths/hundredths of seconds, seconds, minutes, hours, days, dates, months, years, and century
32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
Serial interface supports I2C bus (400 kHz protocol)
Ultra-low battery supply current of 0.6 ΜA (typ at 3 V)
2.0 to 5.5 V clock operating voltage
Automatic switchover and deselect circuitry (for 3 V application select M41T81S datasheet)
Power-down time stamp (HT bit) allows determination of time elapsed in battery backup
Programmable alarm and interrupt function (valid even during battery backup mode) Accurate programmable watchdog timer (from 62.5 ms to 128 s)
Software clock calibration to compensate for crystal deviation due to temperature
Operating temperature of –40 to 85 °C
ECOPACK® package available
M41T81M6E Applications
Industrial
General Uses
