| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | DS17485-5 | Maxim | MAXIM INTEGRATED PRODUCTS DS17485-5 IC, RTC, 17485, DIP24 |
 | CP82C54-10Z | Renesas | CMOS Programmable Timer IC, 10MHz, 5V, 24-Pin DIP |
 | BQ4845S-A4NG4 | Texas Instruments | RTC IC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning 28-SOIC -40 to 85 |
 | DS1315EN-33/T&R | Maxim | IC RTC PHANTOM PAR 20-TSSOP |
 | STK17TA8-RF45 | Cypress | Programmable Timer, Non-Volatile, 1 Timer(s), CMOS, PDSO48, 0.300 INCH, ROHS COMPLIANT, PLASTIC, SSOP-48 |
 | DS1643P-100+ | Maxim | IC RTC CLK/CALENDAR PAR 34-PCM |
 | BQ3285LDSSTRG4 | Texas Instruments | ACPI Compliant RTC IC W 242x8 NVSRAM Alarm Wake-up Dedicated 32kHz Output 3V Op on L Version 24-SSOP 0 to 70 |
 | M41T93SMY6E | Stmicroelectronics | Serial SPI bus real-time clock (RTC) with battery switchover |
 | CP82C54-10 | Intersil | CP82C54-10 6-Channel Real Time Clock IC, 10MHz, 5V, PDIP-24 |
No Image | DS17885-3+ | Maxim | IC RTC CLK/CALENDAR PAR 24-DIP |
No Image | Z84C3010VEG | Zilog | 44-Pin Industrial Quad Timer IC, 8-Bit, 5V, 50mA, S-PQCC-J44 Package |
 | ISL12029IB27AZ | Intersil | Real Time Clock/Calendar with I<sup>2</sup>C Bus™ and EEPROM; SOIC14, TSSOP14; Temp Range: -40° to 85°C |
| BQ4847YMT | Texas Instruments | 0 TIMER(S), REAL TIME CLOCK, DMA28, ROHS COMPLIANT, MODULE, DIP-28 | |
 | BQ4845S-A4NTRG4 | Texas Instruments | 5V Real-Time Clock IC, SOIC-28 Package, Surface Mount |
 | BQ3285S-SB2G4 | Texas Instruments | 5V Real-Time Clock IC, 114B Memory, SOIC-24 Package, 0°C to 70°C |
 | BQ4802LYDWG4 | Texas Instruments | Real Time Clock IC, 3.3V, 0°C to 70°C, SOIC-28 |
 | BQ4845S-A4NTR | Texas Instruments | 5V Clock IC, 4.75V to 5.5V, 85°C, Surface Mount, SOIC |
 | CDP68HC68T1M2Z | Intersil | Clock IC Dual 4MHz SPI SOIC-14 |
 | PT7C43390WEX | Diodes | I2C Serial 2-Wire Real Time Clock IC, SOIC Surface Mount, -40°C to 85°C |
 | BQ4845YS-A4 | Texas Instruments | 5V Real-Time Clock IC, SOIC-28 Package, Surface Mount |