DS1302N+

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DS1302N+

IC RTC CLK/CALENDAR SER 8-DIP

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規格

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Type Clock/Calendar
Features Alarm, Leap Year
TimeFormat HH:MM:SS (12/24 hr)
DateFormat YY-MM-DD-dd
Interface I²C, 2-Wire Serial
Voltage-Supply 1.3V ~ 5.5V
Current-Timekeeping(Max) 14µA ~ 30µA @ 3V ~ 5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 8-SMD, Flat Lead
MemorySize 1B
Voltage-SupplyBattery 1.6V ~ 3.6V
Series Automotive, AEC-Q200

概述

Description

DS1302N+ is a real‑time clock/calendar IC with on‑chip RAM. Key points:
- RTC + calendar: seconds, minutes, hours, day, date, month, year; supports 12/24-hour modes and leap years.
- RAM: 31 bytes for data storage.
- Interface: simple 3‑wire serial (CE, CLK, IO) for register access (not I2C/SPI).
- Power: operates from main VCC and can run from a VBAT backup supply when power is off.
- Backup charging: optional trickle‑charger to top up a backup battery or supercapacitor from VCC.
- Clock source: requires an external 32 kHz crystal oscillator.
- Packages: available in common IC packages; widely used with microcontrollers (Arduino, ESP, etc.).
- Pros/cons: cheap and easy to integrate; less precise than modern TCX/DS323x devices and relies on external crystal for accuracy.
In short: a compact, inexpensive RTC+RAM with a simple interface, ideal for timekeeping and small data logging in embedded projects.

Features

DS1302N+ Features (concise):
- Real-time clock/calendar: seconds, minutes, hours (12/24h), day, date, month, year; leap-year aware.
- Battery backup: separate VBAT keeps time when VCC is off.
- 32 kHz crystal oscillator input for accurate timekeeping (external crystal/oscillator supported).
- 31-byte nonvolatile RAM accessible via a 3-wire serial interface (CE, CLK, IO).
- Three-wire serial interface (not I2C/SPI) for read/write of time and RAM registers.
- Built-in trickle-charge circuit to recharge a backup source (diode/resistor network) for NiCd/NiMH or supercapacitor.
- Optional 1 Hz square-wave output.
- Low-power operation suitable for long battery-backed runtimes.
- Wide supply range: 2.0–5.5 V; temperature range typically -40°C to +85°C.
- Available in common packages (DIP8/SO8).
Note: DS1302N+ is a variant of the DS1302 RTC with these core capabilities.

Package

DS1302N+ is an 8-pin package in the DIP (DIP-8, N) form factor. Some vendors also offer an 8-pin SOIC/SOP option for surface mounting.

Pinout

- Pin count: 8 pins (DIP-8/SOP-8).
- Function: 8-pin Real-Time Clock (RTC) with calendar, 32.768 kHz crystal interface (X1/X2), a three‑wire serial interface (CE, SCLK, IO), power pins (VCC, GND) plus VBAT for battery backup and a trickle-charge circuit. It also provides 31 bytes of RAM and alarm/square-wave features.

Manufacturer

Dallas Semiconductor. It was a semiconductor company that designs and manufactures integrated circuits and microelectronics. The brand is now part of Maxim Integrated, which is in turn part of Analog Devices.

Application

- Real-time clock/calendar for embedded systems
- Data loggers with time stamps
- Alarms and timers in consumer electronics
- Battery-backed, low-power handhelds and wearables
- Home/industrial automation controllers
- Automotive/industrial data logging and scheduling
- Any MCU project needing a simple, reliable RTC with trickle-charge

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