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| Part Number | M41T81SM6E | M41T81SM6F | M41T81SMY6E | M41T82SM6E | M41T81M6E |
|---|---|---|---|---|---|
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Status | Obsolete | Active | Obsolete | Obsolete | Obsolete |
| Type | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar | Clock/Calendar |
| Features | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Alarm, Leap Year, SRAM, Watchdog Timer | Alarm, Leap Year, Square Wave Output, Watchdog Timer |
| Memory Size | - | - | - | 7B | - |
| Time Format | HH:MM:SS:hh (24 hr) | HH:MM:SS:hh (24 hr) | HH:MM:SS:hh (24 hr) | HH:MM:SS:hh (24 hr) | HH:MM:SS:hh (24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial | I²C, 2-Wire Serial |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 3V ~ 5.5V | 2V ~ 5.5V |
| Voltage - Supply, Battery | 2V ~ 3.5V | 2V ~ 3.5V | 2V ~ 3.5V | 2V ~ 5.5V | 2.5V ~ 3.5V |
| Current - Timekeeping (Max) | 100µA @ 2.7V ~ 5.5V | 100µA @ 2.7V ~ 5.5V | 100µA @ 2.7V ~ 5.5V | 10µA @ 5.5V | 100µA @ 2V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 18-SOX, 18-SOIC with Crystal (7.5mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 18-SOX | 8-SOIC | 8-SOIC |
