| PartNumber | M41T56M6F | M41T56MH6E | M41T56M6E |
| Description | Real Time Clock Serial 512 (64x8) | Real Time Clock Serial 512 (64x8) | IC RTC CLK/CALENDAR I2C 8-SOIC |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Category | Real Time Clock | Real Time Clock | Clock/Timing - Real Time Clocks |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | SOIC-8 | SO-28 | - |
| RTC Bus Interface | Serial, I2C | Serial | - |
| Date Format | DW:DM:M:Y | - | YY-MM-DD-dd |
| Time Format | HH:MM:SS | HH:MM:SS | HH:MM:SS (24 hr) |
| Battery Backup Switching | Backup Switching | Backup Switching | - |
| RTC Memory Size | 64 B | 64 B | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Reel | Tube | Tube Alternate Packaging |
| Function | Calendar, Clock | Calendar, Clock | - |
| Product | Real Time Clocks | - | - |
| Series | M41T56 | M41T56 | - |
| Brand | STMicroelectronics | STMicroelectronics | - |
| Product Type | Real Time Clock | Real Time Clocks | - |
| Factory Pack Quantity | 2500 | 28 | - |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs | - |
| Unit Weight | 0.019048 oz | - | - |
| Moisture Sensitive | - | Yes | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | - | - | -40°C ~ 85°C |
| Mounting Type | - | - | Surface Mount |
| Features | - | - | Leap Year, NVSRAM |
| Interface | - | - | I2C, 2-Wire Serial |
| Voltage Supply | - | - | 4.5 V ~ 5.5 V |
| Supplier Device Package | - | - | 8-SO |
| Memory Size | - | - | 56B |
| Voltage Supply Battery | - | - | 2.5 V ~ 3.5 V |
| Current Timekeeping Max | - | - | 100μA (Typ) @ 4.5V ~ 5.5V |