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DS1302+
+BOMIC RTC CLK/CALENDAR SER 8DIP
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Nhà sản xuấtAnalog Devices Inc./Maxim tích hợp
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Ông. Phần #DS1302+
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Có sẵn4168
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Thông số kỹ thuật
| thuộc tính | Giá trị |
| Part Status | Active |
| Base Product Number | DS1302 |
| Digi Key Programmable | Not Verified |
| Type | Clock/Calendar |
| Features | Leap Year, NVSRAM, Trickle-Charger |
| Memory Size | 31B |
| Time Format | HH:MM:SS (12/24 hr) |
| Date Format | YY-MM-DD-dd |
| Interface | 3-Wire Serial |
| Voltage - Supply | 2V ~ 5.5V |
| Voltage - Supply, Battery | 2V ~ 5.5V |
| Current - Timekeeping (Max) | 0.3µA ~ 1µA @ 2V ~ 5V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-PDIP |
| Packaging | Tube |
Tổng quan
Description
### Key Features:
- Battery Backup: Works with an external battery (3V coin cell) to retain timekeeping during power loss.
- Low Power Consumption: Ideal for battery-operated devices.
- Simple Interface: Uses a 3-wire (CE, I/O, SCLK) serial protocol.
- Wide Voltage Range: Operates from 2V to 5.5V.
- 31 x 8 RAM: Stores additional user data.
### Common Applications:
- Digital clocks
- Data loggers
- Embedded systems
### Limitations:
- No built-in temperature compensation (may drift slightly over time).
- Basic functionality compared to newer RTCs (e.g., DS3231).
For simple timekeeping needs, the DS1302+ is a cost-effective choice.
Equivalent
- DS1307 (I²C interface, lower accuracy)
- DS3231 (Higher accuracy, I²C, temperature-compensated)
- PCF8563 (I²C, low power)
- MCP7940N (I²C, battery backup, SRAM)
- RX-8025T (I²C, high precision)
These alternatives vary in interface (SPI/I²C), accuracy, and features but serve similar RTC functions. Choose based on your project's needs.
Pinout
1. VCC1 – Backup power (battery) input.
2. VCC2 – Primary power supply (main power).
3. X1, X2 – Connections for a 32.768kHz crystal oscillator.
4. GND – Ground.
5. CE (Chip Enable) – Activates communication when high.
6. I/O – Serial data input/output.
7. SCLK – Serial clock input for synchronization.
The DS1302+ provides seconds, minutes, hours, date, month, day, and year data with trickle-charge capability for backup power. It communicates via a 3-wire serial interface (CE, I/O, SCLK).
Manufacturer
The DS1302+ is a low-power RTC with trickle-charge capabilities, commonly used in embedded systems for timekeeping. Maxim Integrated (now part of ADI) focused on precision, reliability, and innovation in data conversion, power management, and sensor technologies.
Key Points:
- Manufacturer: Maxim Integrated (now Analog Devices).
- Product Type: Real-time clock (RTC) IC.
- Company Profile: Semiconductor leader in analog/mixed-signal solutions.
Package
Frequently Asked Questions
Q: What is the typical timekeeping current for the DS1302+?
A: It typically draws 0.3μA to 1μA at 2V to 5V supply, making it highly efficient for battery-backed RTC designs.
Q: Does the DS1302+ support leap year compensation?
A: Yes, it includes leap year validation, automatically adjusting dates for years up to 2100.
Q: What interface does this RTC use for communication?
A: It uses a 3-wire serial interface, compatible with standard SPI-like protocols for simple microcontroller integration.
Q: Can the DS1302+ operate with a backup battery?
A: Yes, it features a dedicated battery input (Vbat) with a trickle-charge circuit for maintaining time when main power is lost.
Q: What is the operating temperature range of the DS1302+?
A: It operates from 0°C to 70°C, suitable for commercial and industrial indoor applications.
Q: How much NVSRAM is available for data storage?
A: It provides 31 bytes of non-volatile static RAM (NVSRAM) for storing user configuration or logging data.
Q: Does the DS1302+ support both 12-hour and 24-hour time formats?
A: Yes, it supports 12-hour (with AM/PM) and 24-hour modes, selectable via the 3-wire interface.
