Position: Home  > All Categories> Integrated Circuits (ICs) > bq4285E

bq4285E

Features: *Direct clock/calendar replace-ment for IBM AT-compatible computers and other applications *114 bytes of general nonvolatile storage *Enhanced features include: - System wake-up capability-alarm interrupt output active in battery-backup mode - 2.73.6V operation (bq4285L);4.55.5V operatio...

product image

bq4285E Picture
See larger image
SeekIC No. : 004301328 Detail

bq4285E: Features: *Direct clock/calendar replace-ment for IBM AT-compatible computers and other applications *114 bytes of general nonvolatile storage *Enhanced features include: - System wake-up capability...

bq4285E Data Sheet

floor Price/Ceiling Price

Get Latest Price
Part Number:
bq4285E
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

SeekIC Buyer Protection PLUS - newly updated for 2013!

  • Escrow Protection.
  • Guaranteed refunds.
  • Secure payments.
  • Learn more >>

Month Sales

268 Transactions

Rating

evaluate  (4.8 stars)

Upload time: 2024/6/7

add to my favourite

Payment Methods

All payment methods are secure and covered by SeekIC Buyer Protection PLUS.

Notice: When you place an order, your payment is made to SeekIC and not to your seller. SeekIC only pays the seller after confirming you have received your order. We will also never share your payment details with your seller.
Product Details

Description



Features:

*Direct clock/calendar replace-ment for IBM AT-compatible computers and other applications
*114 bytes of general nonvolatile storage
*Enhanced features include:
   - System wake-up capability-alarm interrupt output active in battery-backup mode
   - 2.73.6V operation (bq4285L);4.55.5V operation (bq4285E)
   - 32kHz output for power management
*Automatic backup and write-protect control to external SRAM
*Functionally compatible with the DS1285
*Less than 0.5A load under bat-tery operation
*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 interrupt event flags:
   -Periodic rates from 122s to 500ms
   - Time-of-day alarm once per second to once per day
*End-of-clock update cycle
   - 24-pin plastic DIP or SOIC


Pinout

Connection Diagram


Specifications

Symbol Parameter Value Unit Notes
VCC VCC relative to VSS -0.3 to 7.0 V
VT DC voltage applied on any pin ex-
cluding VCC relative to VSS 		 -0.3 to 7.0 V  VT VCC + 0.3
TOPR Operating ambient temperature 0 to +70 °C Commercial
-40 to +85 °C Industrial "N"
TSTG Storage temperature -55 to +125 °C  
TBIAS Temperature under bias -40 to +85 °C  
TSOLDER Soldering temperature  260 °C For10seconds



Description

The CMOS bq4285E/L is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calen-dar with alarm features and battery operation. Other features include three maskable interrupt sources, square wave output,and 114 bytes of generalnonvolatilestorage.


A 32.768kHz output of bq4285E is available for sustaining power-management activi-ties. Wake-up capability is provided by an alarm interrupt, which is active in battery-backupmode.


The bq4285E/L write-protects the clock, calendar, and storage registers during power failure. A backup battery then maintains data and operatestheclockandcalendar.


The bq4285E/L 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 backupbattery.


The bq4285E/L integrates a battery-backupcontrollertomakea.




Customers Who Bought This Item Also Bought

Margin,quality,low-cost products with low minimum orders. Secure your online payments with SeekIC Buyer Protection.
You may also be interested in :
Soldering, Desoldering, Rework Products
TGK-900M-B
TGK-900M-1.6D
Switches
US32DMRJ
HBGQ22P-11ET
Memory Cards, Modules
WT32
VTL5C7
Potentiometers, Variable Resistors
RV24YN
WXD4-23-3W
Cables, Wires
821-0814-a
415-0100-150
Discrete Semiconductor Products
T508N12TOF
MUR20040
View more