Overview
The DS1302Z+T&R/C07 is a real-time clock (RTC) and calendar chip produced by Analog Devices Inc./Maxim Integrated. This component is designed to manage all timekeeping functions, including counting seconds, minutes, hours, date of the month, and the month itself. It features a 3-wire serial interface and is packaged in an 8-SOIC (Small Outline Integrated Circuit) with a width of 0.154 inches (3.90 mm). The DS1302Z+T&R/C07 is particularly useful for applications requiring accurate timekeeping and low power consumption.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Supply Voltage | VCC1, VCC2 | 2.0 | 3.3 | 5.5 | V | |
| Logic 1 Input | VIH | VCC + 0.3 | 2.0 | V | ||
| Logic 0 Input | VIL | VCC = 2.0V | -0.3 | 0.3 | V | |
| Active Supply Current (Oscillator Enabled) | ICC2A | VCC2 = 2.0V, CH = 0 | 0.425 | 1.28 | mA | |
| Timekeeping Current (Oscillator Enabled) | ICC2T | VCC2 = 2.0V, CH = 0 | 25.3 | 81 | µA | |
| Standby Current (Oscillator Disabled) | ICC2S | VCC2 = 2.0V, CH = 1 | 25 | 80 | µA | |
| Input Capacitance | CI | 10 | pF | |||
| I/O Capacitance | CI/O | 15 | pF |
Key Features
- Real-Time Clock and Calendar: Manages all timekeeping functions, including seconds, minutes, hours, date of the month, and the month.
- 3-Wire Serial Interface: Simplifies communication with the host system.
- Trickle-Charge Capability: Allows for battery backup using a trickle charger.
- Low Power Consumption: Active supply current as low as 0.425 mA and standby current as low as 25 µA.
- 12/24 Hour Mode: Supports both 12-hour and 24-hour time formats.
- Clock Halt Flag: Allows the clock oscillator to be stopped and the device to enter a low-power standby mode.
- Write-Protect Bit: Prevents accidental writes to the clock or RAM registers.
Applications
- Embedded Systems: Ideal for use in microcontrollers and other embedded systems requiring accurate timekeeping.
- Industrial Automation: Used in various industrial automation applications where precise timing is crucial.
- Consumer Electronics: Found in consumer devices such as set-top boxes, DVD players, and other electronic appliances.
- Medical Devices: Used in medical equipment where accurate timekeeping is essential.
Q & A
- What is the primary function of the DS1302Z+T&R/C07?
The primary function is to manage all timekeeping functions, including real-time clock and calendar operations. - What is the supply voltage range for the DS1302Z+T&R/C07?
The supply voltage range is from 2.0V to 5.5V. - How does the trickle-charge feature work?
The trickle-charge feature allows for battery backup using a specific pattern of bits to enable the trickle charger, and it can be configured to use one or two diodes. - What are the power consumption characteristics of the DS1302Z+T&R/C07?
The active supply current is as low as 0.425 mA, and the standby current is as low as 25 µA. - Can the DS1302Z+T&R/C07 operate in both 12-hour and 24-hour modes?
Yes, it supports both 12-hour and 24-hour time formats. - How does the clock halt flag work?
The clock halt flag allows the clock oscillator to be stopped, placing the device into a low-power standby mode. - What is the purpose of the write-protect bit?
The write-protect bit prevents accidental writes to the clock or RAM registers by setting it high. - What is the typical input capacitance of the DS1302Z+T&R/C07?
The typical input capacitance is 10 pF. - In what package is the DS1302Z+T&R/C07 available?
The DS1302Z+T&R/C07 is available in an 8-SOIC package. - Where can the DS1302Z+T&R/C07 be used?
It can be used in embedded systems, industrial automation, consumer electronics, and medical devices.
