DS1302 Real-Time Clock IC (Precision Through-Hole Timekeeping Semiconductor)

Introduce continuous, uninterrupted timekeeping, scheduling matrices, and calendar tracking into your hardware designs with the premium DS1302 Real-Time Clock IC. Formatted in a highly popular, prototype-friendly 8-pin dual-inline through-hole package, this specialized semiconductor acts as an independent electronic timekeeper that continuously updates time and date information completely separate from your main microcontroller processing loops.

Programming software-based millisecond timing loops directly inside your main code to track real-world hours and days causes massive timing drift whenever the processor encounters complex code blocks, resets, or loses power. This IC resolves that limitation by running on its own dedicated low-power clock loop, keeping time moving accurately even if your primary system crashes or shuts down. It serves as the definitive timekeeping choice for automated data loggers, industrial scheduling panels, smart digital dashboard clocks, and multi-channel relay sequence timers.

Key Features

• Complete Real-Time Calendar Telemetry: Tracks seconds, minutes, hours, day of the week, date of the month, month of the year, and active year data automatically with built-in leap-year compensation valid up to the year 2100.

• Streamlined Three-Wire Serial Interface: Communicates over a highly efficient, low-pin-count synchronous serial bus requiring only three digital input-output lines (Reset, I/O Data, and Serial Clock) from your microcontroller.

• Integrated Battery Backup Trickle Charger: Features dedicated secondary power input lines that switch over instantly to a tiny backup coin cell or capacitor during primary power failure, with software-programmable charging paths to keep the backup cell topped off safely.

• Onboard Non-Volatile Scratchpad Memory: Packed with 31 bytes of static random-access memory (SRAM) to store critical system state variables, custom user settings, or relay schedule parameters securely.

• Ultra-Low Battery Current Consumption: Engineered with advanced low-power processing architecture, drawing minimal nano-ampere current during standalone backup operations to extend battery life for years.

• Standard Through-Hole DIP-8 Structure: Housed in a durable 8-pin plastic dual-inline package that drops perfectly into standard prototype breadboards, vocational testing sockets, and custom through-hole circuit designs.

• Seamless Customization Support: Built on an exceptionally versatile semiconductor blueprint. If your commercial production run, vocational engineering kit, or automated panel build requires pre-matched crystal oscillators, bulk plastic tube packaging, or dedicated IC sockets, we can easily source and bundle the hardware to match your exact business blueprint specifications.

Technical Specifications

Pinout Configuration & Mapping Blueprint

The DS1302 utilizes a space-saving 8-pin arrangement to manage all clock inputs, serial data channels, and dual power references cleanly:

• Pin 1 (VCC2 - Primary Power Input): Connect to your system's main positive direct-current power supply rail (Typically 3.3V or 5V) to power standard data communications.

• Pin 2 (X1 - Crystal Input 1): Connect to the first leg of a standard 32.768 Kilohertz tuning-fork crystal oscillator to drive the internal clock beats.

• Pin 3 (X2 - Crystal Input 2): Connect to the second leg of the 32.768 Kilohertz crystal oscillator.

• Pin 4 (GND - Common Ground): Connect straight to the common negative power reference or grounding track of your circuit grid.

• Pin 5 (CE / RST - Chip Enable / Reset): The bus activation pin. Drive this line high to initialize a serial data transfer cycle with your microcontroller.

• Pin 6 (I/O - Serial Data Line): The bidirectional data pathway. Transfers time, date, and register bytes back and forth between the clock chip and your processor.

• Pin 7 (SCLK - Serial Clock Input): Synchronizes data bit movements along the I/O line, driven entirely by your microcontroller's clock pulses.

• Pin 8 (VCC1 - Backup Power Input): Connect to the positive terminal of a 3V lithium battery or farad storage capacitor to keep the clock updating accurately when VCC2 drops to zero.

Common Applications

• Industrial Scheduling Automation: Provide real-time data logging and precision time-stamping to track exactly when 1-channel, 2-channel, and 4-channel industrial grade relay modules switch power loads.

• Automated Agricultural Drip Irrigation: Bridge with microcontrollers to trigger water pump arrays at specific, pre-programmed hours of the day or night to minimize evaporation waste.

• Smart Attendance Tracking Systems: Act as the primary time reference inside numeric keypad or biometric access doors to securely log employee arrival and departure times.

• Educational Academic Innovation Laboratories: An exceptional instructional semiconductor asset for introducing electronics students to synchronous serial communications, register byte arrays, and battery backup power mapping.

Package Includes:

• 1 x IC DS1302 RTC Real Time Clock