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| PartNumber | M48T37Y-70MH1F | M48T37Y-70MH1 | M48T37Y-70MH1E |
| Description | Real Time Clock 256K (32Kx8) 70ns | Real Time Clock 256K (32Kx8) 70ns | IC RTC CLK/CALENDAR PAR 44-SOH |
| Manufacturer | STMicroelectronics | - | - |
| Product Category | Real Time Clock | - | - |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | SOIC-44 | - | - |
| RTC Bus Interface | Parallel | - | - |
| Time Format | HH:MM:SS | - | - |
| Battery Backup Switching | Backup Switching | - | - |
| RTC Memory Size | 256 kB | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 4.5 V | - | - |
| Minimum Operating Temperature | 0 C | - | - |
| Maximum Operating Temperature | + 70 C | - | - |
| Packaging | Reel | - | - |
| Function | Alarm, Calendar, Clock, NV Timekeeping RAM, Watchdog Timer | - | - |
| Product | Real Time Clocks | - | - |
| Series | M48T37Y | - | - |
| Brand | STMicroelectronics | - | - |
| Moisture Sensitive | Yes | - | - |
| Product Type | Real Time Clock | - | - |
| Factory Pack Quantity | 936 | - | - |
| Subcategory | Clock & Timer ICs | - | - |