DP8570AVX vs DS1743-85+
| Part Number |
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| Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
| Manufacturer | Texas Instruments | Maxim Integrated |
| Description | IC RTC TCP PAR 28-PLCC | IC RTC CLK/CALENDAR PAR 28-EDIP |
| Package | Tape & Reel (TR) | Tube |
| Series | - | - |
| Type | Timer Clock Peripheral (TCP) | Clock/Calendar |
| Features | Alarm, Leap Year | Leap Year, NVSRAM, Y2K |
| Time Format | HH:MM:SS:hh (12/24 hr) | HH:MM:SS (24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | Parallel | Parallel |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Current - Timekeeping (Max) | 1µA @ 5V | 3mA @ 5V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | 28-LCC (J-Lead) | 28-DIP Module (0.600\", 15.24mm) |
| Supplier Device Package | 28-PLCC (11.51x11.51) | 28-EDIP |
| Memory Size | 44B | 8KB |
| Voltage - Supply, Battery | 2.2V ~ 5.1V | - |
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1. What is Real Time Clock (RTC)?
Real time clock is an integrated circuit (IC) that can provide the current date and time, and can maintain time updates even after the device is powered off. It is commonly used in embedded systems, computers, handheld devices, etc.
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2. How does a real-time clock work?
RTC is usually driven by a low-power oscillator (such as a quartz crystal oscillator) and powered by an independent power source (such as a battery), which can continuously time even when the main power supply is off.
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3. How does RTC maintain time even when the device is powered off?
RTC is usually equipped with an independent small battery (such as a button battery) to ensure that it continues to run for time when the device's main power is turned off, until the battery is depleted or re powered.
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4. Can real-time clocks be used to set timers or alarms?
Yes, many RTC chips have built-in alarm functions that can trigger interrupts at set times to perform specific tasks or wake up the system.
