DS1302ZN+

Trickle-Charge Timekeeg Chip, 85Deg C; Ic Function:Trickle-Charge Timekeeping Chip; Supply Voltage Min:2V; Supply Voltage Max:5.5V; Ic Package Type:Soic; No. Of Pins:8Pins; Operating Temperature Min:-40°C; Product Range:- Rohs Compliant: Yes |Analog Devices DS1302ZN+

DS1302ZN+ – 3-Wire Serial Trickle-Charge Timekeeping IC – Analog Devices
Maintain precise timekeeping with minimal power consumption using the Analog Devices DS1302ZN+ real-time clock (RTC) IC. This surface-mount solution delivers calendar functionality and battery backup support for embedded systems requiring reliable time tracking. Ideal for low-power designs, it features integrated NVSRAM and trickle-charging capabilities.

Key Features

Type: Clock/Calendar with date & time tracking
Interface: Simple 3-Wire Serial communication
Voltage Range: 2V to 5.5V primary/battery supply
Ultra-Low Power: Only 0.3µA to 1µA timekeeping current
Temperature Range: -40°C to +85°C operation
Memory: 31B NVSRAM for critical data retention
Formats: HH:MM:SS (12/24hr) time & YY-MM-DD-dd date

Technical Specifications
Housed in an 8-SOIC package (3.90mm width), this RTC provides leap-year compensation and continuous timekeeping during power loss via battery backup (2V-5.5V). The trickle-charger circuit maintains coin-cell batteries, while the serial interface minimizes microcontroller connections. Robust performance across industrial temperature ranges ensures reliability in harsh environments.

Typical Applications

Industrial automation controllers
Medical monitoring devices
Smart meters and utility equipment
POS terminals and kiosks
Automotive data loggers

About Analog Devices
Analog Devices Inc. (ADI) stands at the forefront of high-performance semiconductor solutions, with decades of expertise in precision signal processing and power management technologies. Their components are renowned for exceptional quality and innovation across aerospace, industrial, and communications sectors.
ADI maintains rigorous manufacturing standards, ensuring each DS1302ZN+ meets exacting specifications for long-term reliability. As a leader in analog and mixed-signal ICs, their commitment to technological advancement makes them a trusted partner for mission-critical designs worldwide.

About Real-Time Clocks (RTCs)
Real-Time Clocks are essential components that maintain accurate time/date information independently of main system power. They serve as the chronological backbone for devices requiring event logging, scheduled operations, or time-stamped data acquisition. Without RTCs, systems would lose time tracking during power cycles or reboots.
Modern RTCs like the DS1302ZN+ integrate battery backup, non-volatile memory, and ultra-low power architectures. These features make them indispensable for IoT devices, embedded controllers, and portable electronics where energy efficiency and data integrity are paramount.

Packaging
Available in protective Tube packaging for automated assembly processes. Please inquire about reel options for high-volume requirements.

Frequently Asked Questions
Q: How does the trickle-charger extend battery life?
A: It intelligently maintains backup batteries by delivering micro-current pulses, preventing overcharging while compensating for natural discharge.

Q: Is this RTC compatible with 3V and 5V systems?
A: Yes, its 2V-5.5V operating range supports both voltage levels without external level shifters.

Q: What happens to timekeeping during power failures?
A: The IC automatically switches to battery backup, maintaining accuracy with less than 1µA current draw.

Q: Can I use the 31B NVSRAM for custom data?
A: Absolutely – this non-volatile storage retains user data like calibration settings or event logs during power loss.

Q: Does it automatically adjust for leap years?
A: Yes, the built-in calendar accounts for leap years through 2100.

Q: What’s the typical accuracy of this RTC?
A: Accuracy depends on the external crystal, but typically achieves ±2ppm (about 1 minute/year) with proper 32.768kHz tuning.

❗ Product images are representational. Refer to datasheet for exact specifications. Download Datasheet