Time

NE555N Datasheet – General-purpose Timer ( PDF )

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Part Number: NE555N

Function: General-purpose Single Bipolar Timer

Package:  DIP 8 Pin Type

Manufacturer: STMicroelectronics

Images

NE555N Timer IC

Description

The NE555, NE555N, SA555, and SE555 monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200 mA. […]

Pinout

NE555N datasheet pinout

Features

1. Low turn-off time
2. Maximum operating frequency greater than 500 kHz
3. Timing from microseconds to hours
4. Operates in both astable and monostable modes
5. Output can source or sink up to 200 mA
6. Adjustable duty cycle
7. TTL compatible
8. Temperature stability of 0.005% per °C

NE555N ordering information

NE555N Datasheet

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DS1307 Datasheet – 64 x 8, Serial, Real-Time Clock – Maxim

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Part Number: DS1307

Function: 64 x 8, Serial, I2C Real-Time Clock

Package: 8-Pin DIP, 8-Pin SO Type

Manufacturer: Maxim Integrated

Image

ds1307-real-time-clock
GENERAL Description

The DS1307 serial real-time clock (RTC) is a low power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus.

The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply.

Timekeeping operation continues while the part operates from the backup supply.

 

Pinouts:

DS1307 datasheet

 

Features

1. Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the week, and Year with Leap-Year Compensation Valid Up to 2100
2. 56-Byte, Battery-Backed, General-Purpose RAM with Unlimited Writes
3. I2C Serial Interface
4. Programmable Square-Wave Output Signal 
5. Automatic Power-Fail Detect and Switch Circuitry
6. Consumes Less than 500nA in Battery-Backup Mode with Oscillator Running
7. Optional Industrial Temperature Range: -40°C to +85°C
8. Available in 8-Pin Plastic DIP or SO
9. Underwriters Laboratories (UL) Recognized

 

Official HomePage : https://www.maximintegrated.com/en/products/digital/real-time-clocks/DS1307.html

 

DS1307 Datasheet

DS1307 pdf

Other data sheets are available within the file: DS1307+, DS1307N+, DS1307Z+, DS1307Z+T&R

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