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M41T00M6E
+BOMIC RTC CLK/CALENDAR I2C 8-SOIC
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ManufacturerSTMicroelectronics
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Mfr. Part #M41T00M6E
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Datasheet M41T00M6E DataSheet
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Package 8-SOIC (0.154, 3.90mm Width)
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In Stock6304
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Specifications
| Attribute | Value |
| Supplier | STMicroelectronics |
| Package | Tube |
| ProductStatus | Obsolete |
| Type | Clock/Calendar |
| Features | Leap Year |
| TimeFormat | HH:MM:SS |
| DateFormat | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial |
| Voltage-Supply | 2V ~ 5.5V |
| Voltage-SupplyBattery | 2.5V ~ 3.5V |
| Current-Timekeeping(Max) | 70µA @ 2V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
Overview
Description
- The M41T00M6E is part of STMicroelectronics’ M41T00 family: a low‑power I2C real‑time clock/calendar (RTC) IC.
- It keeps accurate time (seconds, minutes, hours, day/date, month, year; often with day‑of‑week and leap‑year handling) using a 32.768 kHz time base and battery backup to run when main power is off.
- Interface and power: two‑wire I2C serial interface; broad supply range (typical 2.7–5.5 V); optimized for low sleep/current consumption.
- Accessories: may include small SRAM and alarm/timer features depending on variant; M6E denotes a specific package/temperature/footprint revision.
- Applications: embedded systems, data loggers, portable devices, and other electronics needing accurate timekeeping and timestamping, even during power loss.
Equivalent
- Maxim DS1307
- Maxim DS3231
- NXP PCF8563
- Microchip MCP7940N / MCP7941 / MCP7942
- Intersil ISL1208
Note: none are direct pin-for-pin drops; check datasheets for voltage, package, RAM, crystal/oscillator requirements, and I2C timing before substituting.
Features
- I2C (two-wire) serial real-time clock with calendar
- Battery-backed operation for continuous timekeeping on power loss
- Timekeeping: seconds, minutes, hours (24-hour), day of week, date, month, year; leap-year aware
- 32.768 kHz oscillator input (external crystal) for accurate time
- Programmable alarms and periodic timer
- On-chip battery-backed RAM/NVRAM for small data storage
- Power-fail detect and automatic reset support
- Low-power operation suitable for sleep/low-power applications
- Small footprint in M6E package (8-pin variant)
Note: exact RAM size, alarm/timer specifics, and voltage ranges are datasheet-dependent.
Pinout
- Function: I2C serial real-time clock/calendar with embedded non-volatile RAM (NVSRAM) for time/date storage and small user data. Requires an external 32.768 kHz crystal (connections on X1/X2). Pins include Vcc, GND, SDA, SCL, WP, X1, X2.
Manufacturer
- Company type: A multinational electronics and semiconductor company (IC design and manufacture), headquartered in Geneva, Switzerland, producing a broad range of devices such as RTCs, sensors, microcontrollers, and power ICs.
Application
- Data logging: timestamping sensor readings and metering data
- Power-loss resilience: battery-backed RTC for timekeeping during outages
- Scheduling and alarms: timers in consumer, industrial, and automotive electronics
- Networking gear: log timestamps, time-based events, and synchronization
- IoT/wearables: low-power timekeeping with wake-up control for sensors and radios
