| PartNumber | PCF2123BS/1,518 | PCF2123TS/1,112 | PCF2123BS/1,512 |
| Description | Real Time Clock SPI Real time RTC IC | Real Time Clock ultra-low power RTC | IC RTC CLK/CALENDAR SPI 16-HVQFN |
| Manufacturer | NXP | NXP Semiconductors | NXP Semiconductors |
| Product Category | Real Time Clock | Clock/Timing - Real Time Clocks | IC Chips |
| RoHS | Y | - | - |
| Packaging | Reel | Tube Alternate Packaging | Tube Alternate Packaging |
| Brand | NXP Semiconductors | - | - |
| Moisture Sensitive | Yes | - | - |
| Product Type | Real Time Clock | - | - |
| Factory Pack Quantity | 6000 | - | - |
| Subcategory | Clock & Timer ICs | - | - |
| Part # Aliases | 935286382518 | - | - |
| Unit Weight | 0.000776 oz | - | - |
| Series | - | - | - |
| Type | - | Clock/Calendar | Clock/Calendar |
| Package Case | - | 14-TSSOP (0.173", 4.40mm Width) | 16-VFQFN Exposed Pad |
| Operating Temperature | - | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | - | Surface Mount | Surface Mount |
| Features | - | Alarm, Leap Year, Square Wave Output, Watchdog Timer | Alarm, Leap Year, Square Wave Output, Watchdog Timer |
| Interface | - | SPI | SPI |
| Voltage Supply | - | 1.6 V ~ 5.5 V | 1.6 V ~ 5.5 V |
| Supplier Device Package | - | 14-TSSOP | 16-HVQFN (3x3) |
| Memory Size | - | - | - |
| Time Format | - | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) |
| Date Format | - | YY-MM-DD-dd | YY-MM-DD-dd |
| Voltage Supply Battery | - | - | - |
| Current Timekeeping Max | - | 0.33μA ~ 0.38μA @ 2V ~ 5V | 0.33μA ~ 0.38μA @ 2V ~ 5V |