DS1302Z+T&R/C07

Overview

The DS1302Z+T&R/C07 is a trickle-charge real-time clock (RTC) integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It provides timekeeping functions including seconds, minutes, hours, date, month, day of the week, and year with leap-year compensation valid up to the year 2100. The device includes 31 bytes of battery-backed static RAM for general-purpose data storage. Communication with a microprocessor occurs via a simple synchronous 3-wire serial interface consisting of CE, I/O, and SCLK lines. It operates on a supply voltage range of 2V to 5.5V and consumes less than 300nA at 2.0V during timekeeping. The component is housed in an 8-pin SOIC package.

Feature Summary

• Real-time clock/calendar with automatic end-of-month adjustment and leap-year correction through 2100
• 31-byte battery-backed static RAM for user data storage
• Simple 3-wire synchronous serial interface compatible with most microcontrollers
• Programmable trickle charger for charging backup batteries or super capacitors

Applications

• Clock and timing systems requiring low power consumption
• Portable instruments and handheld devices
• Telecommunications equipment
• Faxes and printers
• Battery-powered embedded systems

Procurement Notes

Verify that the C07 suffix corresponds to the specific tape and reel packaging configuration required for automated assembly processes. Confirm the commercial temperature grade (0°C to +70°C) aligns with the operational environment requirements. Ensure the lead-free/RoHS-compliant status meets regulatory standards for the target market. Check current availability as distribution status may vary.

Selection Notes

Select this component when a low-pin-count RTC solution is needed without I2C or SPI complexity. The dual VCC pin architecture allows flexible primary and backup power management. Consider the trickle charger capabilities if direct battery charging from the main supply is desired. Verify that the 3-wire interface matches the available GPIO resources on the host microcontroller.

Part Context

The DS1302 series serves as a successor to the DS1202, offering enhanced features such as dual power pins and programmable trickle charging. The 'Z' designation indicates the 8-pin SOIC package with 150 mil width. The '+' suffix denotes a lead-free and RoHS-compliant manufacturing process. This part belongs to the broader family of Maxim Integrated timekeeping chips designed for cost-sensitive applications.

Replacement Considerations

Direct replacements within the same package and feature set include the DS1302ZN+ for industrial temperature ranges (-40°C to +85°C). Other variants like DS1302S+ offer different SOIC widths. Cross-referencing with newer low-power RTCs may be necessary if lower standby currents are required.