| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
No Image | PT7C4337PE | Diodes | 8-Pin DIP Real Time Clock IC, 1.8V to 5.5V, -40°C to 85°C |
 | DS3231MZ/V+T | Maxim | DS3231MZ Real-Time Clock IC, 3.3V, SOIC, -40°C to 85°C |
 | PCF8564ACX9/B/1 | NXP | Real Time Clock Serial Clock/Calendar/Alarm/Timer/Interrupt Die |
 | PCF8564ACX9/1 | NXP | Real Time Clock Serial Clock/Calendar/Alarm/Timer/Interrupt Die |
 | DS1339C-3 | Maxim | Real Time Clock, 1 Timer(s), CMOS, PDSO16, 0.300 INCH, SOP-16 |
No Image | M48T248Y-70PM1 | Stmicroelectronics | Real Time Clock IC, 1024 KB, 5V, Through Hole, 0°C to 70°C, RoHS Compliant |
 | DS1338C-3 | Maxim | Real-Time Clock IC, 3.3V/2.7V, 0.300 INCH SOIC-16 Package |
 | ISL12024IBZ | Intersil | Clock IC 400kHz 3.3V SOIC Surface Mount |
 | DS1339C-2# | Maxim | IC RTC CLK/CALENDAR I2C 16-SOIC |
 | BQ4845YS-A4G4 | Texas Instruments | IC RTC CLK/CALENDAR PAR 28-SOIC |
 | DS1305EN+T&R/C01 | Maxim | 96B Real-Time Clock IC, 12/24hr Time Format, TSSOP Package |
No Image | ISL1220IUZ-T | Intersil | Real Time Clock IC, MSOP, -40°C to 85°C, 5.5V |
 | BQ4822YMA-70 | Texas Instruments | Real Time Clock IC, 5V, 4.5V to 5.5V, PDIP-14, Through Hole |
 | DS9034PCX | Maxim | Real Time Clock Module, 0°C to 70°C, Surface Mount |
 | PCF8564AU/5BD/1,01 | NXP | Unpackaged Real-Time Clock IC, 1.8-5.5V, -40-85°C, Die |
 | CY14B256K-SP25XC | Cypress | 256Kb NVSRAM IC, 25ns Access Time, 0-70°C, RoHS Compliant |
 | PCF8564AU/5GE/1,01 | NXP | Unpackaged Die Clock/Calendar/Alarm/Timer IC 1.8V to 5.5V -40°C to 85°C |
 | PCF8564AU/10AA/1,0 | NXP | Unpackaged Die Clock/Calendar/Alarm/Timer IC 1.8V to 5.5V -40°C to 85°C |
 | BQ3287EAMT | Texas Instruments | Clock IC, Real Time, 242B, 5V, 0-70°C, PDIP, Through Hole |
No Image | ISL12026IVZ-T | Intersil | TSSOP Clock IC, 2.7V to 5.5V, 3.3V Operating, -40°C to 85°C |