| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | BQ4845YS-A4NTR | Texas Instruments | 5V Real Time Clock IC, SOIC-28 Package, -40°C to 85°C |
 | DS1500WEN+ | Maxim | Clock IC Real-Time 256B 3.3V TSOP Surface Mount -40°C to 85°C |
 | TC8521AM(TP1) | Toshiba | Real Time Clock Parallel 26byte Clock/Calendar/Alarm/Battery Backup 20-Pin SOP T/R |
No Image | DS1374U-33+ | Maxim | I2C RTC, 32.768kHz, 3.3V, UMAX, Counter, Watchdog |
 | DS1742-100+ | Maxim | IC RTC CLK/CALENDAR PAR 24-EDIP |
 | ISL12027IV27Z-T | Intersil | Real Time Clock/Calendar with EEPROM; SOIC8, TSSOP8; Temp Range: -40° to 85°C |
 | ISL12029IB27Z-T | Intersil | Real Time Clock/Calendar with I<sup>2</sup>C Bus™ and EEPROM; SOIC14, TSSOP14; Temp Range: -40° to 85°C |
 | DS1501WE+ | Maxim | IC RTC CLK/CALENDAR PAR 28-TSOP |
No Image | DS1685SN-5+ | Maxim | IC RTC CLK/CALENDAR PAR 24-SOIC |
 | DS17285SN-5+ | Maxim | IC RTC CLK/CALENDAR PAR 24-SOIC |
No Image | M48T37Y-70MH1F | Stmicroelectronics | 5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM |
 | DS1251W-120IND | Maxim | Real Time Clock, Non-Volatile, CMOS, PDIP32, 0.740 INCH, ENCAPSULATED, DIP-32 |
 | BQ3285ESS | Texas Instruments | IC RTC CLK/CALENDAR PAR 24-QSOP |
 | ISL12026IBZ-T7A | Intersil | Industrial Real-Time Clock IC, 6V, 3.3V, TSSOP, -40°C to 85°C |
 | TC8521AM(AS,EL) | Toshiba | 20-Pin SOP Real-Time Clock IC, 5.5V, -40 to 85°C, Surface Mount |
No Image | MCP79401-I/ST | Microchip | REAL TIME CLOCK, PDSO8, 4.40 MM, ROHS COMPLIANT, PLASTIC, TSSOP-8 |
 | DS1286+ | Maxim | MAXIM INTEGRATED PRODUCTS DS1286+ WATCHDOG TIMEKEEPER, 1286, DIP28 |
No Image | DS1556P-70IND+ | Maxim | IC RTC RAM Y2K 5V 70NS 34-PCM |
 | DS1307 | Maxim | Real Time Clock, Volatile, 1 Timer(s), CMOS, PDIP8, 0.300 INCH, PLASTIC, DIP-8 |
 | M48T59Y-70PC1 | Stmicroelectronics | 0 TIMER(S), REAL TIME CLOCK, PDIP28, 0.600 INCH, CAPHAT, PLASTIC, DIP-28 |