BQ3285P - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

BQ3285P
Manufacturer

TI
ChipWorker Part#

CW355919858
RoHS

Lead free / RoHS Compliant
Description

Real Time Clock Multiplexed 114Byte 24Pin PDIP
Documentation

Datasheet

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BQ3285P Specifications

Attribute	Attribute Value

Part Number	BQ3285P
Manufacturer	TI
ChipWorker Part#	CW355919858
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	24 Pin
Case/Package	PDIP
	expand all
Product Lifecycle Status	Unknown
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

General Description
The CMOS bq3285 is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. Other features in clude three maskable interrupt sources, square wave output, and 114 bytes of general nonvolatile storage.
The bq3285 write-protects the clock, calendar, and storage registers during power failure. A backup battery then maintains data and operates the clock and calendar.
The bq3285 is a fully compatible real-time clock for IBM AT compatible computers and other applications. The only external components are a 32.768kHz crystal and a backup battery
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
➤ 160ns cycle time allows fast bus operation
➤ Selectable Intel or Motorola bus timing
➤ Less than 0.5µA load under battery operation
➤ 14 bytes for clock/calendar and control
➤ BCD or binary format for clock and calendar data
➤ 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
➤ Programmable square wave output
➤ Three individually maskable in terrupt event flags:
- Periodic rates from 122µs to 500ms
- Time-of-day alarm once per second to once per day
- End-of-clock update cycle
➤ 24-pin plastic DIP or SOIC

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Ordering Information

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- Carefully tested and packaged by ChipWorker
- Vacuum packed
- Anti-static packaging
- Anti-vibration foam
- Income quality control (IQC), 800+ qualified distributors.
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- Decapsulation control
- X-ray inspection
- XRF inspection
- Electrical testing
- Surface testing

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