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| PartNumber | BQ4845YP-A4E3 | BQ4845YP | BQ4845YP-A4 |
| Description | Real Time Clock w/NVSRAM Control Watchdog Timer | IC RTC CLK/CALENDAR PAR 28-DIP | |
| Manufacturer | Texas Instruments | TI | Texas Instruments |
| Product Category | Real Time Clock | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
| Mounting Style | Through Hole | - | - |
| Package / Case | PDIP-28 | - | - |
| RTC Bus Interface | Parallel | - | - |
| Time Format | HH:MM:SS | - | HH:MM:SS (12/24 hr) |
| RTC Memory Size | 16 B | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 4.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tube | - | Tube |
| Function | Alarm, Calendar, Clock, Timer Interrupt | - | - |
| Brand | Texas Instruments | - | - |
| Product Type | Real Time Clocks | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Clock & Timer ICs | - | - |
| Unit Weight | 0.147798 oz | - | - |
| Series | - | - | - |
| Type | - | - | Clock/Calendar |
| Package Case | - | - | 28-DIP (0.600", 15.24mm) |
| Operating Temperature | - | - | 0°C ~ 70°C |
| Mounting Type | - | - | Through Hole |
| Features | - | - | Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer |
| Interface | - | - | Parallel |
| Voltage Supply | - | - | 4.5 V ~ 5.5 V |
| Supplier Device Package | - | - | 28-PDIP |
| Memory Size | - | - | - |
| Date Format | - | - | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | 2.3 V ~ 4 V |
| Current Timekeeping Max | - | - | 1.5mA (Typ) @ 4.5 V ~ 5.5 V |