| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | M41T81SM6E | Stmicroelectronics | 32kHz I2C/Surface Mount Real Time Clock IC, 20B RAM, -40°C to 85°C |
 | IS82C54Z | Intersil | 8MHz Real Time Clock, 1 Timer, 5V, PLCC, -40 to 85°C |
No Image | BQ4285EP | Texas Instruments | Clock IC Real Time 114B Parallel Through Hole 0-70°C 4.5-5.5V |
 | BQ3285ESSG4 | Texas Instruments | 1 TIMER(S), REAL TIME CLOCK, PDSO24, 0.150 INCH, GREEN, PLASTIC, SSOP-24 |
 | CY14B256K-SP45XC | Cypress | Real Time Clock, 1 Timer(s), CMOS, PDSO48, ROHS COMPLIANT, SSOP-48 |
No Image | MC14541BCPG | Onsemi | Programmable Timer IC, 3MHz, PDIP, 18V |
 | BQ3285ESTR | Texas Instruments | RTC IC with 242x8 NVSRAM Alarm Wake-up 24-SOIC |
No Image | DS12R885S-5+T&R | Maxim | IC RTC CLK/CALENDAR PAR 24-SOIC |
 | DS1747W-120 | Maxim | Real Time Clock, Non-Volatile, 0 Timer(s), CMOS, EDIP MODULE-32 |
 | BQ3285ESG4 | Texas Instruments | 1 TIMER(S), REAL TIME CLOCK, PDSO24, 0.300 INCH, GREEN, PLASTIC, SOIC-24 |
 | DS32C35-33# | Maxim | MAXIM INTEGRATED PRODUCTS DS32C35-33# IC, RTC, ACCURATE I2C, SMD, SOIC20 |
No Image | DS1685SN-5+T&R | Maxim | IC RTC CLK/CALENDAR PAR 24-SOIC |
No Image | DS1244YP-70+ | Maxim | IC RTC PHANTOM PAR 34-PCM |
No Image | M48T35Y-70MH1E | Stmicroelectronics | 5V RTC SRAM 256Kb 70ns Parallel SOIC |
 | DS1742W-150+ | Maxim | IC RTC CLK/CALENDAR PAR 24-EDIP |
 | CY14B256K-SP35XC | Cypress | Real Time Clock, 1 Timer(s), CMOS, PDSO48, ROHS COMPLIANT, SSOP-48 |
 | DP8570AV | Texas Instruments | Clock IC, 44B, 5V, 85°C, PLCC, Surface Mount |
 | PCF8583T/5,512 | NXP | 6V 2.5V to 6V 240B Real Time Clock I2C/Surface Mount SO |
 | PCF8563T/F4,112 | NXP | 8-Bit Real-Time Clock I2C Interface SOIC-8 Surface Mount |
 | CY14B256K-SP35XI | Cypress | 256Kb Non-Volatile NVSRAM, 8b, 3.3V, 60mA, SSOP-48 |