DS12C887

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DS12C887

IC RTC CLK/CALENDAR PAR 24EDIP

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Thông số kỹ thuật

Part Status Obsolete
DigiKey Programmable Not Verified
Type Clock/Calendar
Features Alarm, Daylight Savings, Leap Year, NVSRAM, Square Wave Output
Memory Size 113B
Time Format HH:MM:SS (12/24 hr)
Date Format YY-MM-DD-dd
Interface Parallel
Voltage - Supply 4.5V ~ 5.5V
Voltage - Supply, Battery 2.5V ~ 4V
Current - Timekeeping (Max) 15mA @ 4.5V ~ 5.5V
Operating Temperature 0°C ~ 70°C
Mounting Type Through Hole
Package / Case 24-DIP Module (0.600", 15.24mm)
Supplier Device Package 24-EDIP
Base Product Number DS12C887

Tổng quan

Description

The DS12C887 is a real-time clock (RTC) and calendar chip designed by Dallas Semiconductor (now part of Maxim Integrated). It offers timekeeping functions for embedded systems and is widely used in computers and electronic devices. The DS12C887 operates with a quartz crystal oscillator and maintains accurate timekeeping even during power outages, thanks to its built-in battery backup.
This device provides features like:
- Timekeeping: It tracks hours, minutes, seconds, day, month, and year.
- Alarm Functions: Supports alarms for time-based events.
- Interface: Communicates via a standard two-wire I²C interface, making integration into microcontroller systems straightforward.
- Low Power Consumption: Designed for efficiency, enabling long battery life.
The DS12C887 is commonly used in applications that require precise time data, such as data loggers, industrial machines, and consumer electronics.

Features

The DS12C887 is a real-time clock (RTC) and calendar device designed for use in microprocessor-based systems. Key features include:
1. Real-Time Clock/Calendar: Keeps track of time, date, and day of the week.
2. RTC Accuracy: Typically maintains accuracy within ±2 minutes per month.
3. Battery Backup: Includes a battery backup feature that allows operation even during power loss.
4. Memory: Equipped with 128 bytes of RAM, which is non-volatile and retains data without power.
5. Interface: Communicates via a dual I²C and SPI interface for easy integration with microcontrollers.
6. Operating Voltage: Functions within a voltage range of 3V to 5.5V.
7. Low Power Consumption: Designed for low power usage, making it suitable for battery-operated devices.
8. Alarm Function: Supports programmable alarms for time-based events.
9. Temperature Compensation: Provides temperature-compensated timekeeping for enhanced accuracy.
Overall, the DS12C887 is ideal for applications in embedded systems requiring reliable timing and memory storage.

Package

The DS12C887 is typically available in a 28-pin DIP (Dual In-line Package) and a 28-pin SOIC (Small Outline Integrated Circuit) package type. These packages facilitate easy integration into various electronic circuits and systems.

Pinout

The DS12C887 is a real-time clock (RTC) and non-volatile RAM (NVRAM) chip with a 28-pin Dual In-line Package (DIP).
Pin Count: 28 pins
Functions:
1. Real-Time Clock: It keeps track of time and date, providing accurate timekeeping.
2. NVRAM: It includes 128 bytes of battery-backed RAM for data storage, which retains information even when power is lost.
3. Bus Interface: It uses a multiplexed address/data bus interface for communication, typically compatible with standard microprocessor systems.
4. Control Registers: Contains registers for configuring alarm functions and timekeeping control.
5. Power Management: Equipped with a battery backup feature allowing continuous operation during power outages.
6. Interrupt Output: Provides an interrupt signal for time-related events.
Overall, the DS12C887 is used in applications requiring timekeeping and data storage, such as embedded systems and computer clocks.

Manufacturer

The DS12C887 is manufactured by Maxim Integrated, a company that specializes in designing and producing analog and mixed-signal integrated circuits. Maxim Integrated focuses on developing innovative solutions for various applications, including automotive, industrial, consumer, and communication markets. The company is known for its expertise in power management, signal conditioning, and data conversion, among other areas. In 2021, Maxim Integrated was acquired by Analog Devices, Inc., further expanding its capabilities in the semiconductor industry.

Application

The DS12C887 is a real-time clock (RTC) chip commonly used in embedded systems, personal computers, and industrial applications. Its primary applications include maintaining time and date functions in systems that require accurate timing, such as data loggers, server management, and automation controls. It also features non-volatile memory for storing configuration settings and user data, making it suitable for applications like telecommunications, point-of-sale systems, and any device needing low-power real-time clock functionalities.

Equivalent

The DS12C887 chip is a real-time clock (RTC) with battery backup. Equivalent products include the DS12887, DS12887A, and the N82S100. Alternative RTCs with similar features are the MCP7940N and the PCF85063A. Always verify pin compatibility and specifications before replacement.

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