| Image | Part Number | Manufacturer | Description |
|---|---|---|---|
 | DS17285E-5 | Maxim | Real Time Clock IC, 2KB, 4.5V to 5.5V, 0°C to 70°C, Surface Mount TSOP |
 | DS1557WP-120IND | Maxim | 512KB Real Time Clock IC, Parallel Interface, 85°C, Surface Mount |
 | ISL1218IUZ-T | Renesas | Low Power RTC with Battery Backed SRAM |
 | DS1685S-5 | Maxim | 5V Real-Time Clock IC, 242B Memory, SOIC-24, 0-70°C |
No Image | DS1375 | Maxim | 6-Pin Industrial Real-Time Clock Timer IC, 3.3V, 0.032 MHz, R-XDSO-N6 |
No Image | MCP7940MT-I/MS | Microchip | 8-Pin Industrial-Grade Real-Time Clock Timer IC, 1.8V to 5.5V, MSOP-8 |
 | DS1338Z-33 | Maxim | Real Time Clock I2C/SPI, 56B Memory, 3V/5.5V, -40°C/85°C, SOIC |
No Image | PT7C4339WEX | Diodes | 8-Pin SOIC Industrial-Grade Real-Time Clock Timer IC |
 | DS1747WP-120IND | Maxim | 512KB Real-Time Clock IC, Parallel Interface, Surface Mount, -40°C to 85°C |
No Image | PCF2129AT | NXP | 20-Pin Industrial-Grade Real-Time Clock IC, 1.8V to 4.2V, -40°C to 85°C |
No Image | MCP7940MT-I/ST | Microchip | 8-Pin TSSOP-8 Industrial Real-Time Clock Timer IC |
 | PCF2127AT/1,518 | NXP | 20-Pin SO Surface Mount Real Time Clock IC with 512 User RAM |
No Image | PCF2127AT | NXP | 20-Pin Dual-In-Line Industrial Temperature Real-Time Clock IC |
 | DS17885-3 | Maxim | 8KB Parallel Clock IC, 0°C to 70°C, Through Hole, PDIP |
 | DS1556WP-120 | Maxim | 128KB Real Time Clock IC, Module, 0°C to 70°C, 2.97V to 3.63V |
No Image | PCF85063ATL | NXP | 10-Pin HVSON Real-Time Clock Timer IC, Industrial Temperature, 3.3V Supply |
 | DS1338U-33/T&R | Maxim | 56B Real-Time Clock IC, 3.3V, UMAX Package, -40°C to 85°C |
 | DS1501YSN | Maxim | Clock IC Real-Time 256B 4.5V-5.5V -40°C-85°C Surface Mount SOIC |
 | RX-8581SA:B | Epson | Surface Mount Clock IC, SOP, 1.8V to 5.5V, -40°C to 85°C |
 | DS1501WS+T&R | Maxim | Real Time Clock 256B 0-70°C 3-3.6V SOIC Surface Mount |