Trickle-Charge Timekeeper, Soic-8; Date Format:Day; Date; Month; Year; Clock Format:Hh:Mm:Ss; Clock Ic Type:Timekeeper; Supply Voltage Min:2V; Supply Voltage Max:5.5V; Clock Ic Case Style:Soic; No. Of Pins:8Pins; Product Range:- Rohs Compliant: Yes |Maxim Integrated/analog Devices DS1302Z+

DS1302Z+ – 3-Wire Serial Real-Time Clock with Trickle Charger – Analog Devices

This DS1302Z+ real-time clock (RTC) IC from Analog Devices provides precise timekeeping and calendar functions for embedded systems. Engineered for low-power operation and reliability, it simplifies time-sensitive applications while offering battery backup support via an integrated trickle charger. PCX ensures genuine Analog Devices components with same-day shipping and technical support.

Key Features

• Time & Date Format: HH:MM:SS (12/24 hr) & YY-MM-DD-dd
• Ultra-Low Power: 0.3µA~1µA timekeeping current
• Wide Voltage Range: 2V to 5.5V operation (main & battery)
• Integrated Trickle Charger: Automatic battery maintenance
• Memory: 31B NVSRAM for critical data retention
• Leap Year Compensation: Automatic calendar adjustment

Technical Specifications

This real-time clock IC features a compact 8-SOIC surface-mount package (3.90mm width) with 3-wire serial interface for simple microcontroller integration. Operating within 0°C to 70°C industrial temperature ranges, it maintains accuracy during power loss using an external battery (2V-5.5V). The DS1302 base architecture ensures proven performance in timekeeping applications.

Typical Applications

• IoT devices and smart sensors
• Medical equipment and patient monitors
• POS terminals and kiosk systems
• Industrial automation controllers
• Backup power management systems

About Analog Devices

Analog Devices Inc. (ADI) is a global leader in high-performance semiconductor solutions, renowned for precision analog and mixed-signal technologies. Their acquisition of Maxim Integrated further strengthened expertise in power management and data conversion ICs.

ADI components meet rigorous quality standards for industrial, automotive, and medical applications. Their real-time clock portfolio, including the DS1302 series, delivers industry-leading accuracy and reliability backed by decades of engineering innovation.

About Real-Time Clocks

Real-time clocks (RTCs) are critical components that maintain accurate time and calendar functions independently of main system power. They enable timestamping, scheduling, and event logging in electronic systems where time awareness is essential.

Modern RTC ICs like the DS1302Z+ incorporate battery backup, non-volatile memory, and ultra-low power operation to ensure continuous timekeeping during power outages. These features make them indispensable for data loggers, embedded controllers, and any application requiring precise time synchronization without constant CPU intervention.

Packaging Options

Available in manufacturer-sealed tubes for automated assembly. Contact PCX for reel packaging customization options.

Frequently Asked Questions

Q: Does this IC require an external crystal?
A: Yes, it requires a standard 32.768kHz watch crystal (not included).

Q: Can the trickle charger work with Li-ion batteries?
A: Yes, it supports NiCd, NiMH, or Li-ion batteries up to 5.5V when properly configured via internal registers.

Q: Is the memory retained during power loss?
A: Yes, the 31-byte NVSRAM preserves data using the backup battery.

Q: What communication protocol does it use?
A: It utilizes a simple 3-wire serial interface (CE, I/O, SCLK) compatible with most microcontrollers.

Q: How accurate is the timekeeping function?
A: Accuracy depends on the crystal (±20ppm typical), yielding ±1 minute/month under stable conditions.

Q: Can this RTC operate without a battery?
A: Yes, but calendar/time data will be lost during main power interruptions without backup power.

Product images are representational. Refer to datasheet for exact dimensions and specifications.
Datasheet: Download from PCXCo.com

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