The part number "DS1307Z+T&R" refers to a Real-Time Clock (RTC) IC manufactured by Maxim Integrated (now part of Analog Devices). It is a widely used RTC module with a standard 8-pin Dual In-Line Package (DIP) or Surface Mount (SOIC) configuration.
Key Specifications
Package Type: Typically 8-pin DIP or SOIC. Application: Real-Time Clock and calendar for embedded systems.Pin Function Specifications
Below is a detailed explanation of the DS1307Z+T&R pin functions, as well as a list of the specific pinouts for this chip in its 8-pin package.
Pin Number Pin Name Pin Function Description 1 VCC Positive Power supply (typically +5V). The operating voltage range is 4.5V to 5.5V. 2 SCL Serial Clock Line for I2C Communication . This pin is used to clock data in and out of the chip via I2C protocol. 3 SDA Serial Data Line for I2C communication. This pin is used to transfer data in and out of the chip. 4 SQW/OUT Square Wave Output. This pin outputs a square wave (typically 1 Hz or 32.768 kHz) for timing applications. 5 RST Reset Pin. This pin is used to reset the RTC when needed. It is active low. 6 32KHz/OUT Output pin for a 32.768 kHz square wave (for precise timing). This can also be used for external clock sources. 7 VSS Ground (0V) pin. This is the reference ground for the chip. 8 NC No Connect. This pin is not internally connected to anything and should be left unconnected.Pinout Summary:
Total Pins: 8 Power Supply: Pin 1 (VCC) for +5V, Pin 7 (VSS) for ground. Communication: Pins 2 (SCL) and 3 (SDA) are used for I2C communication. Output Signals: Pins 4 (SQW/OUT) and 6 (32KHz/OUT) for frequency outputs. Reset: Pin 5 (RST) for reset functionality.Frequently Asked Questions (FAQ)
Q: What is the purpose of the DS1307Z+T&R RTC chip? A: The DS1307Z+T&R is a real-time clock (RTC) that keeps track of the current time and date. It uses I2C communication to interact with external microcontrollers or systems. Q: How do I communicate with the DS1307Z+T&R? A: The DS1307Z+T&R uses the I2C protocol for communication. You send and receive data via the SCL (serial clock line) and SDA (serial data line). Q: What is the voltage range for the DS1307Z+T&R? A: The DS1307Z+T&R operates with a voltage range of 4.5V to 5.5V, typically powered by a +5V source. Q: How do I reset the DS1307Z+T&R? A: The DS1307Z+T&R can be reset by pulling the RST pin low. Q: What is the square wave output frequency from the SQW/OUT pin? A: The SQW/OUT pin can output a square wave at either 1Hz or 32.768 kHz, depending on the configuration. Q: What is the function of the 32KHz/OUT pin? A: The 32KHz/OUT pin provides a 32.768 kHz clock signal, typically used for time-keeping in precision applications. Q: How do I power the DS1307Z+T&R? A: Power the DS1307Z+T&R by connecting +5V to the VCC pin (pin 1) and ground to the VSS pin (pin 7). Q: Can I use the DS1307Z+T&R with 3.3V systems? A: The DS1307Z+T&R is designed to operate with a +5V supply, but it can sometimes work with 3.3V systems with careful voltage considerations for communication. Q: Is the DS1307Z+T&R RTC battery-backed? A: Yes, the DS1307Z+T&R has an onboard battery backup feature that allows it to retain time data during power outages.Q: How accurate is the DS1307Z+T&R RTC?
A: The DS1307Z+T&R typically has an accuracy of ±2 minutes per month at 25°C.Q: Can the DS1307Z+T&R output a 1Hz signal?
A: Yes, the DS1307Z+T&R can output a 1Hz square wave from the SQW/OUT pin for timing purposes.Q: What does the NC pin mean?
A: The NC pin (pin 8) is a "No Connect" pin, meaning it has no internal connection and can be left unconnected.Q: How do I configure the frequency output on the DS1307Z+T&R?
A: The frequency output from the SQW/OUT pin is configured via the I2C interface by setting the appropriate bits in the control register.Q: What is the maximum I2C clock speed for the DS1307Z+T&R?
A: The DS1307Z+T&R supports I2C clock speeds up to 400 kHz in Fast Mode.Q: Can the DS1307Z+T&R be used for applications other than timekeeping?
A: While primarily designed for timekeeping, the square wave outputs (1Hz and 32.768kHz) can be used for other timing applications.Q: What is the typical power consumption of the DS1307Z+T&R?
A: The DS1307Z+T&R typically consumes around 1µA in battery backup mode and about 500µA when operating with a +5V supply.Q: How do I set the time on the DS1307Z+T&R?
A: The time is set by writing the appropriate values to the RTC registers via the I2C interface.Q: Does the DS1307Z+T&R have an alarm feature?
A: No, the DS1307Z+T&R does not have a built-in alarm feature, but external components can be added to trigger events.Q: How long does the DS1307Z+T&R retain time when the power is off?
A: The DS1307Z+T&R retains time for up to 7 years on a fresh coin cell battery.Q: Can the DS1307Z+T&R be used in low-power applications?
A: Yes, the DS1307Z+T&R is ideal for low-power applications due to its low current consumption, especially when operating in battery-backup mode.Conclusion
The DS1307Z+T&R is a versatile and commonly used Real-Time Clock IC, with an 8-pin package configuration. The detailed pinout functions and FAQ should provide a complete understanding of its capabilities and how to use it effectively in your projects.
