MC146818A

Name: MC146818A
Rating: 4.5 (10 reviews)

MC146818A is a real-time clock chip used for timekeeping in computer systems.

7,870 Effective Inventory

MC146818A

Effective Inventory7,870

MC146818A is a real-time clock chip used for timekeeping in computer systems.

Manufacturer Part # : MC146818A
Package/Case: PLCC28
Brand: MOTOROLA
Product Categories : Timers or RTCs

Quality Assurance

All parts procured from our supply chain network undergo a rigorous incoming inspection process. This meticulous inspection ensures that the parts received by our customers are authentic and meet the required standards. Additionally, we maintain detailed records of these inspections to ensure transparency and traceability throughout the supply chain.

Certification

We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.

Shipping & Payment

About Shipping

We generally ship orders within a few business days through reliable shipping carriers such as FedEx, SF, UPS, or DHL. We also have support for other shipping methods. If you would like to inquire about specific shipping details or costs, please don't hesitate to reach out to us.

About Payment

We accept various payment methods, including VISA, MasterCard, UnionPay, Western Union, PayPal, and other channels.

If you have a specific payment method in mind or would like to inquire about rates and other details, please feel free to contact us.

WireTransfer

Paypal

CreditCard

WesternUnion

MoneyGram

Service & Packaging

About After Sales Service

All Parts Extended Quality Guarantee

Initiate the application within 90 days from the shipment date.

Confirm the return or exchange with our staff.

Maintain the goods in their original condition as received.

Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]

About packaging

Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.

Example

Tape and Reel

Cut Tape

Tube or Tray

MC146818A DataSheet

Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!

Rapid Quote

Please submit RFQ for MC146818A or email to us: Email: [email protected], we will contact you in 12 hours.

Quantity^*

Contact Person^*

E-mail^*

Company Name

Anything else?

Details

The MC146818A is a real-time clock (RTC) and calendar chip that is commonly used in computer systems to keep track of time and date. It is a 24-pin IC that communicates with the system through a simple interface. The MC146818A features a programmable alarm, periodic interrupt functions, and battery backup to ensure accurate timekeeping even when the computer is turned off.The chip operates on a 32.768 kHz crystal oscillator and has a precision timekeeping capability with an accuracy of ±1 minute per month. It can be used to generate interrupts at regular intervals for scheduling tasks in a computer system. The MC146818A also has a battery backup feature that allows it to retain time and date information in case of power loss.Programming the MC146818A involves setting registers to configure the alarm, periodic interrupt, and other functions. The chip has a set of control registers that allow the user to read and write time and date information, as well as configure the various features of the RTC.

Key Features

Real-time clock (RTC) module
Provides time-keeping, alarm, and timer functions
Contains 114 bytes of NVRAM for data storage
Supports 24-hour format and leap year compensation
Operates at low power consumption
Requires a 32.768 kHz crystal oscillator
Available in a 24-pin DIP package

Application

Real-time clock for computer systems
Timekeeping in embedded systems
Timestamping data in communication systems
Providing time-of-day information in electronic devices
Ensuring accurate timing in industrial automation
Monitoring and controlling time-based processes
Synchronizing devices in distributed systems
Time-stamping data in scientific instruments
Time-based operations in automotive systems
Clock functions in consumer electronics devices

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Manufacturer

Motorola

Product Category !

IC Chips

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification MC146818A PDF Download

FAQs

What is MC146818A?

The MC146818A is a real-time clock (RTC) and calendar chip designed by Motorola. It provides timekeeping functions and a calendar with alarm capabilities, making it suitable for applications requiring accurate timekeeping and date tracking.

How Does MC146818A Work?

The MC146818A operates by keeping track of time and date information using an internal counter and registers. It features a crystal oscillator circuit for accurate timekeeping, along with battery backup support to maintain time during power interruptions. The chip can be interfaced with a microcontroller or computer system for time-related functions.

How Many Pins does MC146818A have and What are the Functions of the Pinout Configuration?

The MC146818A typically comes in a 24-pin DIP (Dual Inline Package) or SOP (Small Outline Package). The pinout configuration includes:

VCC: Power supply pin.
GND: Ground pin.
X1, X2: Crystal oscillator input and output pins.
IRQ: Interrupt request output pin.
AD0-AD7: Address/data pins for communication with the chip.
CS, RD, WR: Control pins for chip select, read, and write operations.
RESET: Reset pin for initialization.

What are the Pros and Cons of MC146818A?

Pros:

Accurate Timekeeping: Provides precise clock and calendar functions for time-sensitive applications.
Battery Backup: Maintains timekeeping during power outages or system shutdowns.
Alarm Functionality: Supports alarm features for event scheduling.
Easy Integration: Can be interfaced with microcontrollers or systems using standard communication protocols.
Reliable Performance: Offers reliable operation for long-term timekeeping needs.

Cons:

Legacy Technology: The MC146818A may have limitations compared to modern RTC solutions.
Limited Features: Some advanced timekeeping features found in newer RTC chips may be lacking.
Package Size: The 24-pin DIP or SOP package may require more PCB space compared to smaller packages.

Are There Any Equivalents/Alternatives to MC146818A for Recommendation?

The DS12887 from Maxim Integrated is a compatible alternative to the MC146818A.
Alternatives to the MC146818A include the PCF8583 from NXP Semiconductors and the DS3231 from Maxim Integrated.

Convenient inquiry

MC146818A

MC146818A

Quality Assurance

Shipping & Payment

Service & Packaging

Rapid Quote