BQ4845S-A4TR - Brand New Texas Instruments Real-time Clocks (RTC)
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Description
The BQ4845S-A4TR is a real-time clock (RTC) electronic component. It is a low-power microprocessor peripheral that provides a time-of-day clock and a 100-year calendar with alarm features. It is designed for use in IBM® AT-compatible computers and other applications.
Specifications and features
- Direct clock/calendar replacement for IBM® AT-compatible computers and other applications
- Functionally compatible with the DS1285
- Closely matches MC146818A pin configuration
- 114 bytes of general nonvolatile storage
- Automatic backup and writeprotect control to external SRAM
- 160 ns cycle time allows fast bus operation
- Selectable Intel or Motorola bus timing (PLCC), Intel bus timing (DIP and SOIC)
- Less than 0.5 µA load under battery operation
- 14 bytes for clock/calendar and control
- Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment
- Time of day in seconds, minutes, and hours - 12- or 24-hour format - Optional daylight saving adjustment
- BCD or binary format for clock and calendar data
- Programmable square wave output
- Three individually maskable interrupt event flags: - Periodic rates from 122 µs to 500 ms
- Time-of-day alarm once per second to once per day
- End-of-clock update cycle
- 24-pin plastic DIP or SOIC
Application Scenarios
The BQ4845S-A4TR can be used in various applications, including but not limited to:
- Real-time clock replacement in IBM® AT-compatible computers
- Electronic devices requiring accurate timekeeping
Comparison
The BQ4845S-A4TR has the following advantages:- Direct replacement for IBM® AT-compatible computers- Closely matches MC146818A pin configuration- Multiple interrupt event flags for flexible programmingThe BQ4845S-A4TR has the following disadvantage:- Limited general nonvolatile storage (114 bytes) -
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
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- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
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Popular parts of the same kind
- Datasheet: Download BQ4845S-A4TR
- Chipdatas Part: CD93-BQ4845S-A4TR
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/12 21:59 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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We recommend to use bank transfer for large orders to save on handling fees.
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DHL(www.dhl.com)
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Free shipping without minimum order.
