| PartNumber | M48T512Y-70PM1 | M48T512V-85PM1 |
| Description | Real Time Clock 4M (512Kx8) 70ns | Real Time Clock 4 MBIT 512 Kbitx8 TIMEKEEPER |
| Manufacturer | STMicroelectronics | STMicroelectronics |
| Product Category | Real Time Clock | Real Time Clock |
| RoHS | T | Y |
| Mounting Style | Through Hole | Through Hole |
| Package / Case | PMDIP-32 | PMDIP |
| RTC Bus Interface | Parallel | Parallel |
| Time Format | HH:MM:SS | HH:MM:SS |
| Battery Backup Switching | Backup Switching | Backup Switching |
| RTC Memory Size | 4 MB | 524288 B |
| Supply Voltage Max | 5.5 V | 3.6 V |
| Supply Voltage Min | 4.5 V | 3 V |
| Minimum Operating Temperature | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C |
| Packaging | Tube | Tube |
| Function | Calendar, Clock, NV Timekeeping RAM | Calendar, Clock, NV Timekeeping RAM |
| Series | M48T512Y | M48T512V |
| Brand | STMicroelectronics | STMicroelectronics |
| Product Type | Real Time Clocks | Real Time Clocks |
| Factory Pack Quantity | 12 | 12 |
| Subcategory | Clock & Timer ICs | Clock & Timer ICs |