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DS1307N

Name: DS1307N
Rating: 4.7 (12 reviews)

IC RTC CLK/CALENDAR I2C 8-DIP

製造商
製造商。部分 #DS1307N
包 8-DIP (0.300, 7.62mm)
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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

DS1307N is a low‑power I2C real‑time clock/calendar from Dallas/Maxim. It keeps time (seconds, minutes, hours, day, date, month, year with leap‑year handling) and offers 56 bytes of battery‑backed RAM for data logging.
Key features
- External 32.768 kHz crystal for time base
- 1 Hz square‑wave output (SQW/OUT) or configurable
- I2C interface (SDA, SCL)
- Battery backup with trickle‑charge circuit to maintain time when VCC is off
- 8‑pin package (DIP/SOIC): VCC, GND, VBAT, SDA, SCL, X1, X2, SQW/OUT
How it works
- Read/write time data over I2C; registers use BCD format
- Clock runs from VCC; when VCC fails, VBAT powers the RTC and SRAM
- External crystal required for accurate timekeeping
Applications
- Clocks, data loggers, time‑stamping, embedded systems needing continuity across power cycles
Notes
- DS1307N variants exist; verify pinout and features in the datasheet for your package. Overall, a simple, inexpensive RTC for basic timekeeping.

Features

DS1307N features (concise):
- I2C two-wire serial interface (address 0x68) for communication with microcontrollers
- Real-time clock with 32.768 kHz crystal input; timekeeping registers (seconds, minutes, hours, day, date, month, year) in BCD
- Battery-backed operation with VBAT pin and automatic switchover when VCC is removed
- Trickle-charge circuit for charging a rechargeable battery or supercapacitor
- 56 bytes of general-purpose NV RAM (addresses 0x08–0x3F) for user data
- SQW/OUT output with selectable square-wave or interrupt mode
- Control bits to set square-wave frequency: 1 Hz, 4.096 kHz, 8.192 kHz, 32.768 kHz
- Operating range: typically 4.5–5.5 V supply; wide temperature range (-40°C to +85°C)
- Package options: 8-pin DIP/SO (DS1307N variants)
Optional: Real-time clock with leap-year handling; simple, low-power operation.

Package

DS1307N comes in an 8-pin DIP (DIP-8) package. The N suffix denotes the plastic DIP variant.

Pinout

- Pin count: 8 pins (DIP8/SO8 package).
- Function: An I2C real-time clock with battery-backed SRAM. It keeps time/calendar (seconds, minutes, hours, day, date, month, year), supports 32.768 kHz crystal via X1/X2, and VBAT backup. Features include 56 bytes of NV SRAM, write-protect (WP), and an optional 1 Hz square-wave output. Typical pinout (DIP8/SO8): Pin1 X1, Pin2 X2, Pin3 GND, Pin4 SDA, Pin5 SCL, Pin6 WP, Pin7 VBAT, Pin8 VCC.

Manufacturer

- Manufacturer: Dallas Semiconductor Corporation (DS1307N). Dallas Semiconductor is an American semiconductor company that designs and manufactures integrated circuits and related electronics. It became part of Maxim Integrated (and later Analog Devices).

Application

DS1307N is a low‑power I2C real‑time clock with battery backup. Common applications:
- Timekeeping and calendar in microcontrollers and embedded systems
- Data loggers and event time‑stamping in sensors and DAQ
- Alarms, timers and scheduled wake‑up in consumer electronics
- Battery‑backed memory for state and settings during power loss
- Portable/low‑power devices (wearables, handhelds) needing accurate time with minimal circuitry

Equivalent

Common equivalents to the DS1307N (I2C RTC) are:
- DS3231 (Maxim) — higher accuracy TCXO RTC
- PCF8563 / PCF8563A (NXP) — I2C RTC with 32kHz support
- MCP7940N (Microchip) — I2C RTC with battery backup
- RV-3029-C2 (Micro Crystal) — low‑power I2C RTC
Note: exact pinout, memory, and features vary; choose by footprint, accuracy, and required peripherals.