| Part Number | DS1685S-3 | DS1685Q-3+ | 
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | 
| Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Type | Clock/Calendar | Clock/Calendar | 
| Features | Alarm, NVSRAM, Square Wave Output, Y2K | Alarm, NVSRAM, Square Wave Output, Y2K | 
| Memory Size | 242B | 242B | 
| Time Format | HH:MM:SS (12/24 hr) | HH:MM:SS (12/24 hr) | 
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd | 
| Interface | Parallel | Parallel | 
| Voltage - Supply | 2.7V ~ 3.7V | 2.7V ~ 3.7V | 
| Voltage - Supply, Battery | 2.5V ~ 3.7V | 2.5V ~ 3.7V | 
| Current - Timekeeping (Max) | 2mA @ 3V | 2mA @ 3V | 
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 24-SOIC (0.295", 7.50mm Width) | 28-LCC (J-Lead) | 
| Supplier Device Package | 24-SOIC | 28-PLCC (11.51x11.51) |